ArticlePDF Available

The Affect of Grip Width on Bench Press Performance and Risk of Injury

Authors:

Abstract and Figures

summary: Bodybuilders, athletes, and recreational lifters select a grip width during the bench press that they believe will produce a greater force output. Research has demonstrated that a wide grip (> 1.5 biacromial width) may increase the risk of shoulder injury, including anterior shoulder instability, atraumatic osteolysis of distal clavicle, and pectoralis major rupture. Reducing grip width to <=1.5 biacromial width appears to reduce this risk and does not affect muscle recruitment patterns, only resulting in a +/-5% difference in one repetition maximum. (C) 2007 National Strength and Conditioning Association
Content may be subject to copyright.
The Affect of Grip Width on Bench Press
Performance and Risk of Injury
Carly M.Green,CSCS
Sports Injury Specialist Clinic, Gidea Park,Romford, United Kingdom
Paul Comfort,MSc,CSCS
London Sports Institute,Middlesex University,Queensway, Enfield, London, United Kingdom
© National Strength and Conditioning Association
Volume 29,Number 5, pages 10–14
Keywords: bench press; injury; performance; glenohumeral joint;
pectorialis major
Weight training, as an increas-
ingly popular culture, was es-
timated to attract more than
40 million Americans in 1998 (18), with
an increase in the number of athletes
and coaches using resistance training to
supplement their sport-specific training
regime and regular gym users training
for aesthetic purposes. The bench press
is a very popular exercise, especially for
individuals seeking aesthetic improve-
ments. However, due to incorrect tech-
nique, individuals are at risk from acute
shoulder injuries involving a sudden
traumatic episode, such as a rupture of
the pectoralis major, during the bench
press (4, 20).
The musculoskeletal system of the
glenohumeral joint has to provide a
base of support for the motion of the
barbell during the bench press. The
performance of the bench press may
place the glenohumeral joint in a posi-
tion approaching 90° of abduction, and
the position may include some external
rotation. Ninety degrees of abduction
combined with end-range external ro-
tation (Figure 1) has been defined as
the “at-risk position” that may increase
the risk of shoulder injuries (10). It has
been reported that a hand spacing of 2
biacromial width (shoulder width as
defined by the distance between
acromion processes) increases shoulder
abduction above 75°, whereas hand
spacing <1.5 biacromial width main-
tains shoulder abduction below 45° (8).
However, the level of external rotation
is minimal during the flat bench press,
but increases in proportion to the angle
of inclination during the incline bench
press.
Acute injuries (rupture of pectorialis
major) and chronic over-use injuries
(anterior instability and atraumatic os-
teolysis of the distal clavicle) are com-
mon. The risk of both acute and chronic
shoulder injury may be increased by
repetitive movements performed with
the shoulder close to the 90° of abduc-
tion, as seen during the bench press
when performed with a grip >1.5 times
bi-acromial width (10, 19, 20). This risk
may be increased with a greater level of
external rotation, leading to the at-risk
position.
Mechanism of Injury
During the bench press extension of
the shoulder on the descent phase caus-
es increased traction to the acromio-
clavicular. Technique performance er-
rors (10, 16, 18) increase the risk of
anterior instability, atraumatic osteoly-
sis of distal clavicle, and pectoralis
major rupture (10, 19, 20). Exercises
reported to produce pain include wide-
summary
Bodybuilders, athletes, and recre-
ational lifters select a grip width
during the bench press that they be-
lieve will produce a greater force
output. Research has demonstrated
that a wide grip (>1.5 biacromial
width) may increase the risk of
shoulder injury, including anterior
shoulder instability, atraumatic os-
teolysis of distal clavicle, and pec-
toralis major rupture. Reducing grip
width to 1.5 biacromial width ap-
pears to reduce this risk and does
not affect muscle recruitment pat-
terns, only resulting in a ±5% differ-
ence in one repetition maximum.
10 October 2007 Strength and Conditioning Journal
grip bench press, incline flys, and be-
hind-the-neck military press, all of
which position the humerus into ab-
duction and external rotation (10, 16,
18).
The loads, repetitions, and sets per-
formed in weight lifting encourage
over-use, chronic-type injuries as ath-
letes will perform 1–12 repetitions
with loads of 80–100% of the one-rep-
etition maximum (17). A variety of
techniques, such as super sets and com-
pound sets, eccentric contractions, and
forced repetitions to muscle failure, are
used by athletes (7, 18) combined with
a number of different exercises (varia-
tions of shoulder press, pec-dec, pec-
toral flys), leading to muscular fatigue
(10). The use of forced repetitions and
eccentric repetitions increase the load-
ing on the skeletal and musculo-tendi-
nous structures and further increase
the risk of injury, especially if used reg-
ularly. Case studies have indicated that
ruptures of the pectoralis major may
occur during the eccentric loading
phase when the musculo-tendinous
junction is at its highest point of
stretch; therefore, regular use of eccen-
tric repetitions may increase the risk of
this injury (4).
The repetitive nature and use of heavy
loads in weight training may provide a
fertile environment for chronic injuries
(18), and it is normal for athletes to
push themselves to the highest weight
limit possible in spite of pain (16),
thereby increasing the risk of injury.
A grip of more than 1.5 biacromial
width increases shoulder torque by 1.5
times that of a narrow grip (8), thus
increasing the risk of injury. Research
has also demonstrated that altering
grip width from 100% biacromial
width up to 190% does not signifi-
cantly (p> 0.05) affect recruitment of
the pectorialis major or the anterior
deltoid; however, the narrower the
grip, the greater the activation of the
triceps brachii (6).
It is the general consensus that the use
of a narrow grip during the bench press
produces less stress for the acromio-
clavicular joint, the inferior gleno-
humeral ligament, and the pectoralis
major (8, 11). By adjusting hand spac-
ing to no more than 1.5 biacromial
width, the component angles of abduc-
tion can be decreased. This in turn will
decrease the peak torque and stress oc-
curring at the shoulder joint (8, 11),
thereby potentially decreasing the risk
of injuries to these structures. It is in-
teresting to note that one article de-
tailed that the narrow grip caused pain
for patients with osteolysis of the distal
clavicle (2); however, as this was not
noted in any other research and because
the exact distance of the grip was not
expressed, it is possible that the nar-
rower grip was still greater than 1.5 bi-
acromial width.
The major mechanisms of injury sug-
gested within the literature are:
Hand spacing >1.5 ×biacromial
width (1, 8, 13).
High or intolerable exercise dose or
repetitive strain (2, 5, 10, 18).
Altered proprioception (postinjury)
(8, 15).
Common Injuries
Anterior Glenohumeral Instability
Anterior glenohumeral instability, de-
fined as the inability to maintain the
humeral head centred in the glenoid
fossa, appears to be the most common
shoulder injury experienced by competi-
tive weight lifters (19). Anterior shoul-
der stability is largely dependant on the
inferior glenohumeral ligament (IGHL).
The IGHL is found attached to the ante-
rior inferior aspect of the humeral head
and to the anterior glenoid and labrum.
The IGHL is responsible for restraining
anterior translation at 90° of abduction;
if the IGHL is damaged, the shoulder be-
comes more susceptible to anterior insta-
bility (19).
Anterior instability is considered a
chronic condition that may occur in
individuals who regularly perform
weight-training exercises with the
11
October 2007 Strength and Conditioning Journal
Figure 1. At-risk position.
shoulder approaching 90° abduction
and may be increased with external ro-
tation (10). However, losing control of
a heavy load during a lifting exercise is
the most common mechanism for
acute subluxation or dislocation and
concurrent instability (16).
Atraumatic Osteolysis of the
Distal Clavicle
A stress-failure syndrome of the distal
clavicle is a pathologic process of bone
destruction to the subchondral bone
of the distal clavicle (2). The injury
appears to be a chronic condition
mostly caused by repetitive weight-
training exercises, as seen in body-
builders and powerlifters (20). The
weakness of the clavicles makes this
area of the shoulder girdle highly sus-
ceptible to trauma (11). The extension
mechanism of the shoulder during the
eccentric phase of the bench press ex-
cessively stresses the acromioclavicular
joint and is thought to contribute to
osteolysis of the distal clavicle (18)
caused by repetitive microtrauma dur-
ing weight lifting (20).
Atraumatic osteolysis of the distal clavi-
cle appears to be caused by repetitive
movements performed with the shoul-
der at 90° abduction, which is ap-
proached during the bench press when
performed with a grip >1.5 times biacro-
mial width (10, 20) and worsened if ex-
ternal rotation also occurs, as seen in the
inline bench press and behind neck
press.
The incidence of osteolysis mimics the
increase in the number of athletes using
strength training, although large num-
bers of weight-lifting subjects with oste-
olysis do not seem to exist (2).
Pectoralis Major Rupture
A rupture of the pectoralis muscle oc-
curs mainly during strength training
and especially during the bench press
(11). It is characterized by a sudden
acute injury often occurring during the
eccentric loading phase when the mus-
culo-tendinous junction is at its highest
point of stretch (4). Due to the twisting
orientation of the inferior pectorialis
fibers that converge onto the proximal
aspect of the humerus, the inferior fibers
of the pectoralis major are at a higher
risk of trauma (11). The injury occurs
during the concentric phase after the ec-
centric lowering that stresses the inferior
pectorialis fibers as the humerus con-
trols the barbell up to finish the press
(1). When the glenohumeral joint is in
extension during the descent phase
where the bar touches the chest, the pec-
toralis muscle is stretched and contract-
ed and it is the load in this position that
forces the inferior pectorialis fibers to
tear. The inferior fibers are lengthened
disproportionately during the final 30°
of humeral extension, creating a me-
chanical disadvantage during the eccen-
tric phase, resulting in an increased risk
of injury (21).
Ruptures occur commonly at the tendi-
nous insertion on the humerus after ex-
cessive weight is applied to a maximally
contracted muscle (5). Prior research
noted that 24 out of 33 subjects suffered
a pectoralis rupture during power lifting
and bodybuilding with a bench-pressing
mechanism (1).
Bench Press Performance
The bench press should be performed
with a grip <1.5 biacromial width,
lowering the bar in a slow, smooth,
controlled manner to the lower por-
tion of the pectorals (Figure 2) to re-
duce the level of abduction and rota-
tion at the shoulder. The bar should
move through the same plane of mo-
tion during the lifting phase, but
should be more rapid.
The action of the bench press has a var-
ied kinematics pattern (13). The more
experienced lifter will control the bar to
and from the chest following a path that
keeps the lever arm closer to its center of
gravity (using a narrow grip <1.5 biacro-
mial width, lowering the bar to the
lower portion of the pectorals), which is
created by the support base of the gleno-
humeral joint. The experienced lifter
will also take longer to complete the ex-
ercise, therefore resulting in a decrease
12 October 2007 Strength and Conditioning Journal
Figure 2. Mid-range bar position.
in force exerted on the musculo-tendi-
nous junction (13).
Research has demonstrated a nonsignifi-
cant difference ±5% (p> 0.05) in one
repetition maximum with a grip width of
100% and 200% biacromial width, (3,
12). Electromyographic results showed
that grip width did not significantly af-
fect activity of the sternocostal head of
the pectorialis major (p> 0.05). Howev-
er, the narrow grip significantly in-
creased the activity of the clavicular head
(p< 0.01) and the activity of the triceps
brachii (p< 0.05) compared to the wide
grip (3, 12). Therefore, this demonstrat-
ed that force is not dramatically reduced
and neither is there a reduction in the
contribution of the pectoral muscles
when grip width is reduced.
It may also be advisable to avoid incline
variations of the bench press, unless the
angle is specific for sports performance,
as this will lead to a greater level of exter-
nal rotation and possibly an increase in
the risk of injury. Research has also
demonstrated that the level of inclina-
tion does not alter activation of the clav-
icular (upper) portion of the pectorals,
but does decrease activation of the ster-
nal portion, resulting in a reduction in
force (9).
Recommendations
To potentially minimize the risk of in-
jury, the bench press should be per-
formed with a grip 1.5 biacromial
width to maintain shoulder abduction
within 45° (8, 10). It has been suggested
that the descent phase should finish 4–6
cm above the chest (11), and the nar-
rower grip width could potentially re-
duce the risk of injury by reducing the
level of stretch on the inferior pectorialis
fibers. However, this would only be ap-
plicable to the recreational lifter, as
competitive power lifters must lower the
bar and touch the chest prior to the lift-
ing phase. The adjustments to the grip
width will decrease the angle of abduc-
tion and possibly external rotation at the
shoulder, in turn potentially reducing
the risk of shoulder injury without alter-
ing the benefits or performance of the
exercise (3, 6, 12).
It is also essential that altering technique
loads are reduced to allow increased lev-
els of proprioception and perfection of
the new technique (10), especially if re-
habilitating postinjury, as this can result
in reduced proprioception, and the coac-
tivation of rotator cuff muscles can be al-
tered greatly, leading to an increased risk
of recurrent instability (15).
References
1. A
ARIMAA
, V., J. R
ANTANEN
, J. H
EIKKI
-
LA
, L. H
ELTTULA
,
AND
S. O
RAVA
. Rup-
ture of the pectoralis major muscle.
Am. J. Sports Med. 32:1256–1262.
2004.
2. A
UGE
, W.K.,
AND
R.A. F
ISCHER
.
Arthroscopic distal clavicle resection
for isolated atraumatic osteolysis in
weight lifters. Am. J. Sports Med.
26:189–192. 1998.
3. B
ARNETT
, C., V. K
IPPERS
,
AND
P.
T
URNER
. Effects of variations of the
bench press exercise on EMG activity
of five shoulder muscles. J. Strength
Cond. Res. 9:222–227. 1995.
4. B
UTCHER
, J.D., A. S
IEKANOWICZ
,
AND
F. P
ETTRONE
. Pectoralis major rupture:
Ensuring accurate diagnosis and effec-
tive rehabilitation. Phys. Sportsmed.
24(3):37–42. 1996.
5. C
AREK
, P.J.,
AND
A. H
AWKINS
. Rup-
ture of pectoralis major during parallel
bar dips: Case report and review. Med.
Sci. Sports Exer. 30:335–338. 1998.
6. C
LEMENS
, J.M.,
AND
C. A
ARON
. Effect
of grip width on myoelectric activity of
the prime movers in the bench press. J.
Strength Cond. Res. 11:82–87. 1997.
7. E
SENKAYA
, I., H. T
UYGUN
,
AND
M.
To
RKMEN
. Bilateral anterior shoulder
dislocation in a weight lifter. Phys.
Sportsmed. 28(3):93–100. 2000.
8. F
EES
, M., T. D
ECKER
, L. S
NYDER
-
M
ACKLER
,
AND
M.J. A
XE
. Upper ex-
tremity weight-training modifications
for the injured athlete: A clinical per-
spective. Am. J. Sports. Med. 26:732–
742. 1998.
9. G
LASS
, S.C.,
AND
T. A
RMSTRONG
.
Electromyographical activation of the
pectorialis muscle during incline and
decline bench press. J Strength Cond.
Res. 11:163–167. 1997.
10. G
ROSS
, M.L., S.L. B
RENNER
, I. E
S
-
FORMES
,
AND
J.J. S
ONZOGNI
. Anterior
shoulder instability in weight lifters.
Am. J. Sports Med. 21:599–603.
1993.
11. H
AUPT
, H.A. Upper extremity injuries
associated with strength training. Clin
Sports Med. 20:481–491. 2001.
12. L
EHMAN
, G.J. The influence of grip
width and forearm pronation/supina-
tion on upper-body myoelectrical ac-
tivity during the flat bench press. J.
Strength Cond. Res. 19:587–591. 2005.
13. M
ADSEN
, N.,
AND
T. M
C
L
AUGHLIN
.
Kinematic factors influencing perfor-
mance and injury risk in the bench
press exercise. Med. Sci. Sports Exer.
16:376–381. 1984.
14. M
C
C
ANN
, P.D., M.E. W
OOTTEN
,
M.P. K
ADABA
,
AND
L.U. B
IGLIANI
. A
kinematic and electromyographic
study of shoulder rehabilitation exer-
cises. Clin. Orthop. Related. Res.
288:179–188. 1993.
15. M
YERS
, J.B., Y.Y. J
U
, J.H. H
WANG
, P.J.
M
C
M
AHON
, M.W. R
ODOSKY
,
AND
S.M. L
EPHART
. Reflective muscle acti-
vation alterations in shoulders with an-
terior glenohumeral instability. Am. J.
Sports Med. 32:1013–1021. 2004.
16. N
EVIASER
, T.J. Weight lifting: Risks
and injuries to the shoulder. Clin.
Sports. Med. 10:615–621. 1991.
17. R
ASKE
, %.,
AND
R. N
ORLIN
. Injury in-
cidence and prevalence amoung elite
weight and power lifters. Am. J. Sports
Med. 30:248–256. 2002.
18. R
EEVES
, R.K., E.R. L
AWKOWSKI
,
AND
J. S
MITH
. Weight training injuries: Part
2: Diagnosing and managing chronic
conditions. Phys. Sportsmed. 26(3):55–
63. 1998.
19. S
PEER
, K.P. Anatomy and pathome-
chanics of shoulder instability. Clin
Sports Med. 14:751–760. 1995.
20. S
TEPHENS
, M., P.M. W
OLIN
, J.A. T
AR
-
BET
,
AND
M. A
LKHAYARIN
. Osteolysis
of the distal clavicle; readily detected
13
October 2007 Strength and Conditioning Journal
and treated shoulder pain. Phys.
Sportsmed. 28(12):35–44. 2000.
21. W
OLFE
, S.W., T.J. W
ICKIEWICZ
,
AND
J.T. C
AVANAUGH
. Ruptures of the pec-
toralis major muscle. An anatomical
and clinical analysis. Am. J. Sports Med.
20:587–93. 1992.
Carly M. Green is a Graduate Sports Re-
habilitator, Strength and Conditioning
Coach, and the Founder and Director of
Sports Injury Specialist Clinic (SISC).
Paul Comfort is a Senior Lecturer and
Strength and Conditioning Coach, Lon-
don Sports Institute, Middlesex Univer-
sity.
14 October 2007 Strength and Conditioning Journal
Green
Comfort
... Unfortunately, musculoskeletal pain and injuries associated with the bench press exercise are a common problem among elite and recreational lifters, especially at the shoulder complex (Bengtsson et al., 2018). Specific bench press-related injuries that have been reported include Distal Clavicular Osteolysis (DCO), pectoralis major rupture, glenohumeral (GH) instability and rotator cuff injury (Durall et al., 2001;Green and Comfort, 2007;Bengtsson et al., 2018). Although high quality data regarding specific bench press injuries are lacking, one study estimated the prevalence of DCO in competitive weightlifters to be 27% (Scavenius and Iversen, 1992). ...
... Despite the reported injuries, there appears to be a lack of understanding about bench press technique as a risk factor for injury. The available literature mainly consists of clinical expert opinions (Fees et al., 1998;Durall et al., 2001;Green and Comfort, 2007), which provide theories of injury mechanisms without biomechanical evidence. Multiple theories regarding potential bench press injury mechanisms have been developed, for instance, clinical experts argue that shoulder abduction angles larger than 45°and wide grips of 2 bi-acromial widths during the bench press could theoretically lead to high compression forces in the acromioclavicular (AC) joint (Fees et al., 1998;Green and Comfort, 2007). ...
... The available literature mainly consists of clinical expert opinions (Fees et al., 1998;Durall et al., 2001;Green and Comfort, 2007), which provide theories of injury mechanisms without biomechanical evidence. Multiple theories regarding potential bench press injury mechanisms have been developed, for instance, clinical experts argue that shoulder abduction angles larger than 45°and wide grips of 2 bi-acromial widths during the bench press could theoretically lead to high compression forces in the acromioclavicular (AC) joint (Fees et al., 1998;Green and Comfort, 2007). It is hypothesized that these high forces, especially when applied repetitive, may lead to microtrauma at the subchondral bone of the distal clavicular head, which may increase the risk for DCO (Fees et al., 1998;Green and Comfort, 2007;Schwarzkopf et al., 2008). ...
Article
Full-text available
While shoulder injuries resulting from the bench press exercise are commonly reported, no biomechanical evidence for lowering injury risk is currently available. Therefore, the aim of the present study was to compare musculoskeletal shoulder loads and potential injury risk during several bench press variations. Ten experienced strength athletes performed 21 technical variations of the barbell bench press, including variations in grip width of 1,1.5 and 2 bi-acromial widths (BAW), shoulder abduction angles of 45°, 70° and 90°, and scapula poses including neutral, retracted, and released conditions. Motions and forces were recorded by an opto-electronic measurement system and an instrumented barbell. An OpenSim musculoskeletal shoulder model was employed to estimate joint reaction forces in the glenohumeral and acromioclavicular joints. Time-series of joint reaction forces were compared between techniques by statistical non-parametric mapping. Results showed that narrower grip widths of < 1.5 BAW decreased acromioclavicular compression (p < 0.05), which may decrease the risk for distal clavicular osteolysis. Moreover, scapula retraction, as well as a grip width of < 1.5 BAW (p < 0.05), decreased glenohumeral posterior shear force components and rotator cuff activity and may decrease the risk for glenohumeral instability and rotator cuff injuries. Furthermore, results showed that mediolaterally exerted barbell force components varied considerably between athletes and largely affected shoulder reaction forces. It can be concluded that the grip width, scapula pose and mediolateral exerted barbell forces during the bench press influence musculoskeletal shoulder loads and the potential injury risk. Results of this study can contribute to safer bench press training guidelines.
... • Bench Press: While primarily an upper body exercise, the bench press can affect the thoracic and cer vical spine due to the arching technique used to re duce the range of motion and lift heavier weights. Excessive arching can lead to thoracic spine hyper extension and associated pain [16]. ...
... • Wyciskanie na ławce płaskiej: Chociaż wyciskanie na ławce jest ćwiczeniem głównie górnej części ciała, może mieć wpływ na kręgosłup piersiowy i szyjny ze względu na technikę mostkowania stosowaną w celu zmniejszenia zakresu ruchu i podnoszenia większych ciężarów. Nadmierne mostkowanie może prowadzić do przeprostu kręgosłupa piersiowego i związanego z tym bólu [16]. ...
Article
Full-text available
Key word: lower back injuries, powerlifting, spine injuries Słowa kluczowe: urazy dolnego odcinka pleców, trójbój siłowy, urazy kręgosłupa Summary Background. Powerlifting is a non-Olympic sport consisting of three main lifts: squat, bench press, and deadlift. Powerlifting involves repetitive heavy loading and extreme exertion, which can cause injuries to the spine, especially to the lower back. Such injuries can be anything from minor sprains and strains to more significant problems like fractures or herniated discs. This article reviews the scientific research on back injuries and how po-werlifting is related to them. The aim was to report on the incidence of lower back injuries and their proportion in powerlifting-related injuries among powerlifters. Materials and methods. A thorough search of major electronic databases, such as Embase and MEDLINE/Pubmed, was conducted. The data concerning powerlifting-related injuries, especially those involving lower back, was extracted. Statistical analysis was performed with MetaXL (version 5.3) software. Results. This meta-analysis included 9 studies, comprising a total of 799 patients. 565 injuries were reported, 200 of them involved pain of the lower back. Statistical analysis revealed that lower back pain occurred approximately in every fourth powerlifter (Pooled prevalence estimate (PPE) = 25.6% (95% CI: 15.8%-38.7%)) and over one third of all powerlifting-related injuries entailed pain of the lower back (PPE = 35.4% (95%CI: 26.2%-45.8%)). Conclusions. Lower back injuries are a prevalent and significant issue in powerlifting, affecting a substantial proportion of athletes. For the purpose of creating efficient preventative and management plans, it is imperative to comprehend the biomechanical, training-related, and individual aspects that contribute to these injuries.
... Em essa perspectiva, as evidências científicas atuais nos dizem que existem múltiplos fatores relacionados ao maior rendimento esportivo como a predisposição genética (Figueira et al., 2012), a suplementação nutricional (Close, Hamilton, Philp, Burke & Morton, 2016;Lanhers et al., 2017), a execução técnica (Green & Comfort, 2007;Wagner, Evans, Weir, Housh & Johnson, 1992), os métodos de recuperação com o objetivo de manter e melhorar o desempenho competitivo (Dupuy, Douzi, Theurot, Bosquet & Dugué, 2018), a qualidade do sono (Dattilo et al., 2011;Durán Agüero et al., 2015). Embora esses fatores tenham sido relacionados ao maior rendimento esportivo, nem sempre isso ocorre, pois a preparação esportiva é um conjunto de sistemas que, de forma integrada, facilitam a preparação do atleta e que podem ser influenciados por múltiplos fatores (ambientais, biológico, cultural) (Reverdito, Scaglia & Montagner, 2013). ...
... Além disso, foi sugerido anteriormente que uma amplitude de preensão > 1,5 biacromial aumentaria o risco de lesão aumentando o torque na articulação do ombro em até 1,5 (Green & Comfort, 2007 Na segunda e terceira semana, os atletas treinaram com o método 5x5, ou seja, cinco séries de cinco repetições com elásticos ou resistência fixa. Antes e após o treinamento, a força isométrica máxima (MIF) foi avaliada com a medição do pico de torque (PT), a taxa de desenvolvimento de força (TFD), o índice de fadiga (FI) e o tempo na força isométrica máxima foram avaliados. ...
Article
Full-text available
RESUMO O objetivo desta pesquisa é apontar os estudos que descrevem variáveis que se associam a um impacto positivo no desempenho competitivo em atletas de para powerlifting. Para desenvolver o estudo foi utilizada as diretrizes Preferred Reporting Items for Systematic Reviews e Meta-Analyses Extension for Scoping Reviews (PRISMA-ScR) e os estudos foram extraídos de bases de dados eletrônicas como Web of Science, PubMed, Scopus, ScienceDirect e EBSCO. Foi realizado um processo de seleção por título, resumo e texto completo, de acordo com os critérios de inclusão e exclusão. Inicialmente foram identificados 154 estudos que após a eliminação de duplicatas e aplicação dos critérios de inclusão, foram selecionados 8 artigos originais para análise qualitativa. Os resultados indicam que existem fatores fisiológicos e biomecânicos relacionados ao desempenho esportivo. A ingestão de placebo, uso de monohidrato de creatina, percentual de massa magra, predisposição genética e diversos métodos de recuperação de curto e médio prazo, como agulhamento seco e imersão em água fria, são fatores fisiológicos relacionados ao desempenho. Em relação aos fatores biomecânicos, foi evidenciado que a mensuração da preensão da barra se relaciona com maior produção de força e velocidade propulsora média.
... 26 Powerlifters often use a wider grip when performing the bench press, which might pose a high risk due to the shoulder joint's abducted and externally rotated position, as Green et al described. 39 It is worth noting that weightlifters use an even wider grip when executing the snatch, which may contradict this explanation. The authors of the previous systematic review on injuries among weightlifters and powerlifters 4 also pointed out that the weights used in the bench press are typically much heavier than those used in the snatch relative to body weight, thus placing higher forces on the shoulders at extreme positions. ...
Article
Full-text available
Objective To systematically review the literature on the incidence, prevalence, anatomical injury localisation and risk factors in Olympic weightlifting and powerlifting. Design Updated systematic review, PROSPERO registration (CRD42022382364). Data sources Four databases (PubMed, Embase, SPORTDiscus and Web of Science) were searched on 19 February 2024. Eligibility Reports assessing injury incidence and prevalence in Olympic weightlifting and powerlifting, published between January 2015 and February 2024, were included in addition to reports from a previous systematic review. The ‘Quality Assessment Tool for Observational Cohort and Cross-sectional Studies’ was used to assess methodological quality. Results Of 1765 screened records, eight new reports were found, resulting in 17 reports in the review. 12 reports covered weightlifting and seven covered powerlifting, with two of the reports included in both categories as they addressed both sports. In weightlifting, the period prevalence of injuries during competitions was 10.7%–68%, the incidence was 2.4–3.3 injuries/1000 hours of training, and the most common injury sites were the knee, lower back, shoulder and hands/fingers. In powerlifting, one report showed a point prevalence of 70%. Injury incidence was 1.0–4.4 injuries/1000 hours of training, and the most common injury sites were the lower back/pelvis, shoulder and elbow/upper arm. Both sports showed a high prevalence of pelvic floor dysfunction (eg, urinary incontinence) among females (50%) compared with males (9.3%). Conclusions This updated systematic review supports the conclusions of previous reviews and shows new findings that pelvic floor dysfunction is very common in both sports. Due to the distinctly different study designs and settings, further direct comparisons between sports were difficult. In weightlifting, reports mainly focused on injuries during competitions. In powerlifting, injury incidence was low, but injury prevalence was high when defining injury as a painful condition that impairs training/competition.
... For BP, participants laid flat on the bench with their knees bent and their feet flat on the floor. The hand placement on the barbell was at a width that was 1.5 times the width of the shoulders [18]. A research assistant was designated as a spotter and positioned behind the bench to assist if the subject struggled to lift the weight. ...
Article
Full-text available
Purpose This study aims to fill a significant gap in sports science research by examining the underexplored effects of asymmetric load training on the deep stabilisation system (DSS), strength, and maximal power in female softball players. Methods Fourteen participants were divided into two groups: a control group (CON), which exercised with a symmetrically weighted bar, and an experimental group (EXP), which used a bar with asymmetrically distributed weight. The asymmetric load with a distribution of weight that was gradually increased during the 8-week intervention program. The assessment included a 1 repetition maximum (1RM) test for deadlift, flat bench press, front squat, and 4RM tests for single-leg leg press for both legs, along with evaluations of DSS and strength/performance, before and after a resistance training program. A two-way ANOVA was used to compare pre- and post-intervention performance on the DSS and 1RM strength tests. Results The results showed significant improvements in all 1RM and 4RM tests for both groups in all exercises (p > 0.001), with no significant differences between the groups (p < 0.05). However, a dependent t-test in the EXP group revealed significant improvements in DSS strength/performance from pre- to post-measurements in all tests, with large effect sizes. In contrast, the CON group showed significant improvements only in trunk extension, side plank, and prone tests. Conclusions These findings indicate that asymmetric training may provide superior benefits in strengthening the DSS, while still achieving comparable gains in maximal strength.
... A reference for bench press is the biacromial width, the distance between acromion processes [26]. The bench press grip width changes the glenohumeral joint angles, > 2 acromial width increases shoulder abduction above 75 °, and 1.5 acromial width decreases the angle of shoulder abduction, below 45 ° [26,27]. Moreover, there are no significant differences in 1RM between three different grip widths [28]; instead, the appropriate grip width improves the velocity for 30 % of 1RM [6] and better muscle activation [3]. ...
Article
This research aimed to conduct a systematic review of para powerlifting strength performance. The searches were conducted in three electronic databases: PubMed, Scopus, and SPORTDiscus. Intervention studies related to para powerlifting performance were included. The main information was extracted systematically, based on criteria established by the authors. The data on study design, sample size, participant’s characteristics (e. g. type of disability, sex, age, body weight, and height), training experience, assessment tools, physical performance criteria, and force-related outcomes were extracted and analyzed. The studies (n=9) describe factors related to biomechanics and performance. Outcomes revealed that the one-repetition maximum test is used as load prescription and that para powerlifting should work at high speeds and higher loads. Regarding technique, grip width with 1.5 biacromial distance provides a good lift and partial amplitude training as an alternative to training. There are no differences in total load and movement quality in the lumbar arched technique compared with the flat technique. As a monitoring method, repetitions in reserve scale was used for submaximal loads. Finally, our outcomes and discussion indicated strategies and techniques that can be used by para powerlifting coaches.
... Therefore, electromyographic evaluation of these muscles could provide more information on the involvement of these muscles in the bench press and seated chest press exercises with their grip variations. Moreover, some authors have reported that when, in the bench press exercise, the hand spacing is > 200% of the biacromial distance, the shoulder position puts the athlete at a high risk of injury (Gross et al., 1993); therefore, the grip should not exceed 150% of the biacromial distance (Green and Comfort, 2007). Saeterbakken et al. (2017) compared the sEMG activity in the bench press exercise in the style of competition with either the +25° inclined and −25° declined bench position (wide grip) or using a narrow and medium grip (flat bench). ...
Article
Full-text available
This study aims to compare muscle activity in the pectoralis major, anterior deltoid, and triceps brachii in the horizontal bench press exercise with a prone grip at 150% and 50% of the biacromial width and the seated chest press exercise with two types of grips (a neutral grip at ~150% of the biacromial width and a prone grip at ~200% of the biacromial width). Twenty physically active adults performed a set of 8 repetitions at 60% of the one repetition maximum. The results showed that the clavicular portion of the pectoralis major had significantly greater muscle activity in the seated chest press exercise with a neutral grip (~30% of the maximal voluntary isometric contraction (MVIC)) than in the lying bench press exercise with a prone grip at 150% of the biacromial width (~25% MVIC). The muscle activity of the anterior deltoid was not significantly different across any exercise or grip evaluated (~24% MVIC). The muscle activity of the triceps brachii was significantly higher in the lying bench press exercise with a grip at 50% biacromial width (~16% MVIC) than at 150% of the biacromial width (~12% MVIC). In conclusion, all exercises and grips showed similar muscle activity, and the selection of these exercises should not be based exclusively on the grounds of muscle activation but rather on the load capacity lifted, the level of technique of the participant, and/or the transference to the specific sporting discipline or event.
... They performed a single repetition, without pausing, with a constant tempo of the eccentric phase of the movement (2 s) and a volitional tempo of the concentric phase of the lift (Wilk et al., 2020). Hand positioning on the bar was similar throughout each trial and was placed at 150% of the participant's biacromial distance (Green and Comfort, 2007). The test consisted of three to five attempts. ...
Article
Full-text available
The objective of this study was to compare the impact of cambered and standard barbells used during the bench press exercise on the number of performed repetitions and mean velocity during a bench press training session that included 5 sets performed to volitional failure at 70% of one-repetition maximum (1RM) (for each barbell type). An additional objective was to determine whether there would be any difference in neuromuscular fatigue assessed by peak velocity changes during bench press throws performed 1 and 24 hours after the cessation of each session. The research participants included 12 healthy resistance-trained men. Participants performed 5 sets of the bench press exercise to volitional failure against 70% of 1RM with the cambered or standard barbell. The Friedman’s test showed an overall trend of a significant decrease in the mean velocity (p < 0.001) and a number of performed repetitions (p < 0.001) from the first to the fifth set (p < 0.006 and p < 0.02, respectively for all) under both conditions, yet neither bar showed significant differences between the corresponding sets. Two-way ANOVA indicated a significant main effect of time (p < 0.001) for peak velocity during the bench press throw. The post-hoc comparisons showed significantly lower peak velocity during the bench press throw one hour after the bench press compared to pre (p = 0.003) and 24-hour post intervention (p = 0.007). Both barbells caused a similar decrease in peak barbell velocity during the bench press throw performed one hour after the bench press training session, with values returning to baseline 24 hours later. This indicates that bench press workouts with either a standard or a cambered barbell present the same training demands.
Article
Full-text available
Existen diferentes tipos de agarre que pueden utilizarse en el remo horizontal en máquina de polea baja. El objetivo de este estudio fue realizar un análisis electromiográfico de la activación muscular de los músculos dorsal ancho, bíceps braquial, deltoides posterior y parte transversa del trapecio, para diferentes agarres bilaterales y anchuras. La muestra estuvo formada por 12 participantes varones sanos. Se midió el nivel de activación muscular, expresado como porcentaje de una contracción voluntaria máxima. Los resultados mostraron una diferencia significativa (ρ≤0,05) en el bíceps braquial, siendo el agarre estrecho neutro el que más lo activaba. Por otro lado, el deltoides posterior se activó más con los agarres más anchos, siendo el agarre neutro ancho el que más lo activó. Hubo diferencias significativas en el trapecio, que se activó más con el agarre neutro de anchura media. En el caso del músculo dorsal ancho, aunque no de forma significativa, fue el agarre supino ancho. Concluimos que, aunque no se encontraron diferencias en el músculo dorsal ancho, el trapecio parece ser el músculo que más se activa con este ejercicio, siendo el agarre neutro estrecho el que muestra una mayor activación en el bíceps braquial. Palabras clave: Activación muscular, agarres, electromiografía, contracción máxima voluntaria, remo horizontal de polea baja Abstract. There are different types of grip that can be used in horizontal row on a low pulley machine. The aim of this study was to carry out an electromyographic analysis of the muscle activation of latissimus dorsi muscle, biceps brachii, posterior deltoid and transverse part of trapezius, for different bilateral grips and widths. The sample consisted of 12 healthy male participants. The level of muscle activation, expressed as a percentage of a maximum voluntary contraction, was measured. The results showed that a significant difference (ρ≤0.05) was obtained in the biceps brachii, with the narrow neutral grip activating it the most. On the other hand, the posterior deltoid was more activated with the wider grips, with the wide neutral grip activating it the most. There were significant differences in the trapezius, which was activated the most with the medium width neutral grip. In the case of the latissimus dorsi muscle, although not significantly, it was the wide supine grip. We concluded that, although no differences were found in the latissimus dorsi muscle, the trapezius seems to be the muscle that is most activated with this exercise, with the narrow neutral grip showing the highest activation in the biceps brachii. Keywords: muscle activation, grips, electromyography, voluntary maximum contraction, low pulley horizontal rowing
Article
Weightlifting associated shoulder injuries have seen a dramatic rise in the last 20 years. Distal clavicular osteolysis, coined weightlifter's shoulder, is one such condition caused by repetitive microtrauma to the distal clavicle with subsequent, painful development of bony erosions and resorption of the distal clavicle. Diagnosis, treatment, and prevention of this condition can be challenging. In this article, we highlight evidence-based clinical recommendations for the diagnosis and management of distal clavicular osteolysis, including specific considerations for atraumatic and posttraumatic etiologies, to help clinicians better care for their patients. Activity modification and rehabilitation are the mainstays of the initial treatment. Adjuvant treatments, such as injections or surgery, may be required in refractory cases or in certain patient populations. Early recognition and treatment of weightlifter's shoulder is essential to prevent progression to acromioclavicular joint pathology or instability and to allow for continued participation in sport-specific activities.
Article
Full-text available
This experiment investigated the effects of varying bench inclination and hand spacing on the EMG activity of five muscles acting at the shoulder joint. Six male weight trainers performed presses under four conditions of trunk inclination and two of hand spacing at 80% of their predetermined max. Preamplified surface EMG electrodes were placed over the five muscles in question. The EMG signals during the 2-sec lift indicated some significant effects of trunk inclination and hand spacing. The sternocostal head of the pectoralis major was more active during the press from a horizontal bench than from a decline bench. Also, the clavicular head of the pectoralis major was no more active during the incline bench press than during the horizontal one, but it was less active during the decline bench press. The clavicular head of the pectoralis major was more active with a narrow hand spacing. Anterior deltoid activity tended to increase as trunk inclination increased. The long head of the triceps brachii was more active during the decline and flat bench presses than the other two conditions, and was also more active with a narrow hand spacing. Latissimus dorsi exhibited low activity in all conditions. (C) 1995 National Strength and Conditioning Association
Article
Full-text available
The purpose of this study was to determine the effect of grip width on myoelectric activity of the pectoralis major, anterior deltoid, triceps brachii, and biceps brachii during a 1-RM bench press. Grip widths of 100,130,165, and 190% (G1, 2, 3, 4, respectively) of biacromial breadth were used. Mean integrated myoelectric activity for each muscle and at each grip width was determined for the concentric portion of each 1-RM and normalized to percentages of max volitional isometric contractions (%MVIC). Data analysis employed a one-factor (grip width) univariate repeated measures ANOVA. Results indicated significant main effects for both grip width (p = 0.022) and muscles (p = 0.0001). Contrast analyses were conducted on both main effects. Significant differences (p <= 0.05) were found between grip widths G4 and both Gl and G2 relative to %MVIC. Significant %MVIC differences on the muscles main effect were also found. All prime movers registered significantly greater %MVICs than the biceps and, in addition, the triceps %MVIC was greater than the pectoralis major. (C) 1997 National Strength and Conditioning Association
Article
Background: Patients with glenohumeral instability have proprioceptive deficits that are suggested to contribute to muscle activation alterations. Hypothesis: Muscle activation alterations will be present in shoulders with anterior glenohumeral instability. Study Design: Posttest-only control group design. Methods: Eleven patients diagnosed with anterior glenohumeral instability were matched with 11 control subjects. Each subject received an external humeral rotation apprehension perturbation while reflexive muscle activation characteristics were measured with indwelling electromyography and surface electromyography. Results: Patients with instability demonstrated suppressed pectoralis major and biceps brachii mean activation; increased peak activation of the subscapularis, supraspinatus, and infraspinatus; and a significantly slower biceps brachii reflex latency. Supraspinatus-subscapularis coactivation was significantly suppressed in the patients with instability as well. Conclusions and Clinical Relevance: In addition to the capsuloligamentous deficiency and proprioceptive deficits present in anterior glenohumeral instability, muscle activation alterations are also present. The suppressed rotator cuff coactivation, slower biceps brachii activation, and decreased pectoralis major and biceps brachii mean activation may contribute to the recurrent instability episodes seen in this patient group. Clinicians can implement therapeutic exercises that address the suppressed muscles in patients opting for conservative management or rehabilitation before and after capsulorraphy procedures.
Article
The purpose of this study was to determine the relationship between motor unit recruitment within two areas of the pectoralis major and two forms of bench press exercise. Fifteen young men experienced in weight lifting completed 6 repetitions of the bench press at incline and decline angles of +30 and -15[degrees] from horizontal, respectively. Electrodes were placed over the pectoralis major at the 2nd and 5th intercostal spaces, midclavicular line. Surface electromyography was recorded and integrated during the concentric (Con) and eccentric (Ecc) phases of each repetition. Reliability of IEMG across repetitions was r = 0.87. Dependent means t-tests were used to examine motor unit activation for the lower (incline vs. decline) and upper pectoral muscles. Results showed significantly greater lower pectoral Con activation during decline bench press. The same result was seen during the Ecc phase. No significant differences were seen in upper pectoral activation between incline and decline bench press. It is concluded there are variations in the activation of the lower pectoralis major with regard to the angle of bench press, while the upper pectoral portion is unchanged. (C) 1997 National Strength and Conditioning Association
Article
Ten consecutive patients with isolated atraumatic osteolysis of the distal clavicle who had failed results with conservative treatment were treated with arthroscopic resection of the involved distal clavicle (average, 4.5 mm). All patients were men with an average age of 30.4 years, had unilateral involvement, and were considered aggressive amateur to elite weight lifters or bodybuilders. Postoperative symptoms consisted of pain at the incision and discomfort from extravasation of the irrigation fluid. At an average followup of 18.7 months, all patients had returned to their sport (average, 3.2 days) and to their preoperative weight training program (average, 9.1 days). They continued to be asymptomatic throughout the follow-up period and were able to increase both their training volume and strength from preoperative levels. Limited arthroscopic resection of the distal clavicle for isolated atraumatic osteolysis is a viable alternative for the weight lifter or bodybuilder. The ability to continue training without significant interruption as well as a more acceptable cosmetic appearance are benefits for these patients. Limited arthroscopic resection of the distal clavicle may be sufficient for this entity in this patient population, rather than the 1 to 2 cm previously reported. A sport-specific functional outcome questionnaire has been developed for this patient population.
Article
Rupture of the pectoralis major muscle is an uncommon athletic injury that can result in both functional and cosmetic deficiency. To date, most ruptures occurring in athletes have occurred while performing bench press or overhead lifting maneuvers. We describe a case of a pectoralis major rupture occurring while performing weighted parallel bar dips. Despite the popularity of this exercise, injuries associated with this exercise are infrequently reported. This injury can be easily detected by having the patient perform specific maneuvers on physical examination to accentuate any defect that may be present. In most cases, this injury is surgically repaired, although conservative treatment can be a successful option. Treatment options are discussed and recommendations given. A partial or complete tear of the pectoralis major muscle is a rare event and is often not easily detected on physical examination. Surgical repair is currently recommended to restore previous levels of strength and to correct the resulting cosmetic defect. Repair is rarely necessary to perform the normal activities of daily living.
Article
Rupture of the pectoralis major muscle and tendon, which occurs most frequently among weight lifters but has been reported in many sports, can most often be diagnosed based on the history and physical exam. Surgical intervention for complete ruptures has a clear advantage over conservative therapy. Athletes of all levels can be expected to return to near preinjury levels of participation following surgery and a well-constructed, supervised rehabilitation program. This should involve immobilization followed by range-of-motion exercises and strength training of gradually increasing resistance.
Article
The repetitive nature of weight training and the often heavy loads involved provide fertile ground for chronic injuries. Common chronic injuries include rotator cuff tendinopathy and stress injuries to the vertebrae, clavicles, and upper extremities. In addition, muscle hypertrophy, poor technique, or overuse can contribute to nerve injuries such as thoracic outlet syndrome or suprascapular neuropathy. Chronic medical conditions that are known to occur in weight trainers include vascular stenosis and weight lifter's cephalgia. Management of chronic problems will vary by condition, but relative rest and correction of poor technique are important for many.
Article
A young man experienced bilateral anterior dislocation of the shoulders while doing seated behind-the-neck military presses. When improperly performed, military presses can cause injury because the shoulder muscles may be unable to support the weight being lifted. To improve form, avoid injury, and maximize gain from workouts, beginning weight lifters and those with shoulder instability should be counseled to use safer alternative techniques such as frontal military presses that do not allow movement posterior to the plane of the body.