Fernando Diefenthaeler

Universidade Federal de Santa Catarina | UFSC · Departamento de Educação Física

Background The rate of torque development (RTD) has been associated with sports performance and can be improved during the biological maturation process of young soccer players. The aim of this study was to compare the effects of maturity status on the knee extensors’ RTD of soccer players after appropriate normalization. Methods Twenty-seven youn...

The study aimed to compare measurements of fascicle length (FL), muscle thickness (MT), and pennation angle (PA) of the vastus lateralis (VL) and rectus femoris (RF) muscles of cyclists, runners, triathletes, and physically active individuals (control group). Forty volunteers (10 cyclists, 10 runners, 10 triathletes, and 10 physically active indivi...

Bicycle set-up dimensions and cycling kinematic data are important components of bicycle fitting and cyclist testing protocols. However, there are no guidelines on how bicycles should be measured and how kinematic data should be collected to increase the reliability of outcomes. This article proposes a consensus regarding bicycle set-up dimensions...

We investigated the effects of binge drinking on maximal strength, time to exhaustion during a high-intensity isometric fatigue protocol, and neuromuscular responses of the elbow flexor muscles. Ten young male participants were randomized in two conditions: (1) alcohol consumption (ALC) or (2) placebo consumption (PLA). In each condition, volunteer...

The study investigated musculotendinous adaptations in high and low performance triathletes compared to a control group, using ultrasonography to analyze the Achilles tendon and triceps surae muscles. Only the pennation angle of the medial gastrocnemius muscle showed statistically significant differences between the groups (p = 0.002), with higher...

Purpose: Neural and peripheral effects of induced muscle pain on explosive force production were investigated. Methods: Nine participants performed two maximal, six explosive, and six electrical stimulations induced (twitches and octets) isometric knee extensions before and after (15 min of rest) receiving an intramuscular injection of hypertonic s...

To examine the effects of 7-days juçara powder (JP) intake on oxidative stress biomarkers and endurance and sprint cycling performances. In a randomized, placebo-controlled, crossover, and triple-blind study, 20 male trained cyclists were assigned to intake 10 g of JP (240 mg anthocyanins) or placebo (PLA) for 7 days and performed a cycling time-to...

Objective. To investigate the effects of Manual Ischemic Compression (MIC) and Instrumental Ischemic Compression (ICG) and Pressure Algometer (ICA), in the treatment of women with MPS in descending trapezius. Patients and Methods. This is a double-blinded, randomized, placebo-controlled trial. Patients were randomized into 3 groups: MIC, ICG, and I...

The objective of the study was to compare measurements of length, thickness, and cross-section area (CSA) of the patellar tendon (PT) among cyclists, runners, triathletes, and physically active individuals (control group). Forty healthy individuals (10 cyclists, 10 runners, 10 triathletes, and 10 physically active individuals) aged between 18 and 4...

Background: The rate of torque development (RTD) has been associated with sports performance and can be improved during the biological maturation process of young soccer players. The aim of this study was to compare the effects of maturity status on the knee extensors’ RTD of soccer players after appropriate normalization. Methods: Twenty-seven yo...

Background Mobile Applications (App) have reshaped approaches to the intervention and monitoring of physical training. The Safe Runner App is an example. However, evidence of the reliability of the Safe Runner App to obtain aerobic parameters still needs to be investigated. Aims The present study aimed to analyze the accuracy and reproducibility o...

The goal of this study was to investigate the effects of photobiomodulation therapy (PBMT) on performance, oxygen uptake (VO2) kinetics, and lower limb muscle oxygenation during three successive time-to-exhaustions (TTEs) in cyclists. This was a double-blind, randomized, crossover, placebo-controlled trial study. Sixteen cyclists (~23 years) with a...

Objective This study aimed to investigate the effects of an 8-week face-to-face rehabilitation program on subjects with persistent symptoms of COVID-19 compared to a remote monitoring group. Design Clinical, non-randomized, controlled, and open study. The face-to-face supervised rehabilitation lasted eight consecutive weeks, twice a week. The remo...

New technologies have amplified the possibilities for processing and incorporating data and scientific methods in algorithms through the integration of the use of mobile technology and a wide range of wearables that allow acquisition metrics in real-time. These technologies arise as a possible alternative to supply market demand and to present prac...

The objective of this study was to evaluate the intra-and inter-rater reliability and agreement between conditions with and without a special device (SD) in the evaluation of the patellar tendon (PT) cross-sectional area (CSA). Forty trained adult volunteers participated in the study. With the knee positioned at 90°, the ultrasound probe was placed...

This study aimed to analyse unilateral countermovement jumps (CMJ) performance and muscle soreness in lower limbs, as well as to compare lower limb asymmetry over 48 h after a stretch-shortening cycle (SSC) fatigue protocol. Fourteen judo athletes performed unilateral CMJ on each leg before, and after the 5th and 10th sets over 24 h and 48 h of an...

Contextualização: O Taekwondo é um esporte de combate no qual as ações de alta intensidade são determinantes em competições. Atletas dessa modalidade devem tomar decisões rápidas entre situações de ataque e defesa. Portanto, testes de tempo de reação específicos no Taekwondo são importantes para avaliar o desempenho e auxiliar a preparação física d...

Contextualização: O ciclismo é uma atividade praticada no mundo inteiro. Por esse motivo, suas técnicas e características são amplamente estudadas e bem definidas na literatura. As principais informações utilizadas para a organização técnica desta modalidade são as forças aplicadas no pedal durante o movimento de pedalada, sendo um importante fator...

The aim of this study was to determine if quadriceps morphology [muscle volume (MV); cross-sectional area (CSA)], vastus lateralis (VL) muscle architecture, and muscle quality [echo intensity (ECHO)] can explain differences in knee extensor maximal voluntary isometric contraction (MVIC), crank torque (CT) and time‒to‒exhaustion (TTE) in trained cyc...

In combat sports, strikes or counter-strikes response time (RT) can be related to performance and sporting success. Moreover, training sessions are usually highly fatiguing, which is expected to impair basic skills, such as RT. Thus, this study aimed to investigate the effect of fatigue on punches and kicks RT of karate practitioners. Twelve indivi...

Endurance performance is a multifactorial phenomenon. Physiologically, endurance performance depends on high maximal oxygen uptake, anaerobic thresholds, and movement economy. The precise mechanisms mediating these factors with respect to metabolic/muscular efficiency (mitochondrial amount, muscle capillarization, and others) are still unclear. Reg...

The sequelae of coronavirus disease-2019 (COVID-19) are another socio-economic problem of the pandemic. Fatigue and dyspnea are the most prevalent symptoms. It is not known whether exercise can be used to treat long COVID-19. This study aimed to investigate the effects of an 8-week face-to-face rehabilitation program on COVID-19 compared to a remot...

The sequelae of coronavirus disease-2019 (COVID-19) are another socioeconomic problem of the pandemic. Fatigue and dyspnea are the most prevalent symptoms. It is not known whether exercise can be used to treat long COVID-19. This study aimed to investigate the effects of an 8-week face-to-face rehabilitation program on COVID-19 compared to a remote...

Introdução: Em esportes de combate, principalmente no caratê, o tempo de reação frente a um determinado estímulo é de extrema importância durante ataques, contra-ataques e defesas. Evidências sugerem que, assim como a idade (i.e. jovens vs. idosos), a experiência de treinamento pode influenciar nas respostas neuromusculares, em especial no tempo de...

Introdução: De acordo com estudos anteriores, a característica da modalidade praticada pode alterar a relação força-comprimento do músculo reto femoral. Apesar da corrida, do ciclismo e do triatlo serem todos esportes cíclicos de resistência, as características biomecânicas (i.e., comprimento muscular) das modalidades são diferentes. Corredores tre...

Introdução: A prática esportiva produz adaptações no controle neuromuscular que são dependentes da carga mecânica e do gesto motor de cada modalidade. Apesar da corrida, do ciclismo e do triatlo serem esportes cíclicos de resistência, as características biomecânicas difere entre as modalidades e podem proporcionar diferentes adaptações neuromuscula...

The study aimed to assess the effect of different front crawl stroke rates (SR) in the oxygen uptake (V̇O2) kinetics and V̇O2 peak, the total time to exhaustion (TTE), and blood lactate concentration ([La]) at 95% of the 400-m front crawl test (T400) mean speed (S400). Twelve endurance swimmers performed a T400 and four trials at 95% of the S400: (...

O fruto juçara é proveniente da palmeira Euterpe edulis Martius, uma espécie da Mata Atlântica brasileira, similar ao açaí. Este fruto pode proporcionar benefícios à saúde, em parte, devido à sua elevada atividade antioxidante, conferida principalmente pela presença de antocianinas. O consumo de alimentos ricos em antocianinas, como o fruto juçara,...

Dez anos se passaram desde daquele 5 de novembro de 2009 - o sonho de criar um laboratório que pudesse estudar afundo as interações do exercício em contexto de aumento de rendimento humano e recuperação deste pudesse proporcionar aos estudantes de graduação em educação física e fisioterapia - não só da Universidade Federal do Amazonas - mas de toda...

Purpose The objective of this study was to evaluate a plyometric conditioning activity (3 sets of 5 countermovement jumps, [CA]) for twitch properties and voluntary knee extension. Methods After a familiarization session, fourteen highly-trained sprint athletes, 12 men (23.25 ± 7.17 years) and 2 women (23.0 ± 2.8 years) performed 2 experiments, ea...

Purpose The generalized joint hypermobility (GJH) syndrome is a condition characterized by a connective tissue disorder that may negatively affect the muscle function and muscle balance in the lower limbs. The aim of study was to compare isometric and dynamic maximal strength, total work, active optimum angle, electromyographic activity strategy, a...

Purpose: Verify the acute responses of static stretching (SS) on the rectus femoris (RF), vastus medialis (VM), and vastus lateralis (VL) elasticity and knee/hip range of motion (ROM). Additionally, to investigate if there are consistency among quadriceps muscle elasticity after SS. Methods: Acute effect of SS on pre-post-intervention design. Th...

The study aimed to compare the activity of low and fast-twitch muscle fibers of the prime mover muscles used in cycling between recreational cyclists with different training levels during a high-intensity exercise. Twelve male cyclists performed, on distinct days, a graded exercise test and two bouts of cycling at severe-intensity. The first bout w...

This study aimed to investigate the validity of a boxing-specific test to predict anaerobic threshold (AT) using the heart rate deflection point (HRDP) in boxing athletes with mobile technology. Ten male boxing athletes performed the boxing-specific incremental test (TBOX). Maximal heart rate (HR MAX), HRDP, pace, maximal punch frequency (FP MAX),...

Purpose To investigate and compare the effects of therapeutic exercise, therapeutic ultrasound and photobiomodulation on pain, functionality and recruitment pattern of motor units, after a rehabilitation protocol for seamstresses with neck pain. Materials and methods All 36 female, randomly divided into three groups; i)exercise control group, ii)e...

Table 1

Previous evidence has shown that the consumption of fruit-derived anthocyanins may have exercise benefits. This review aimed to summarize the effects of fruit-derived anthocyanins on cycling-induced responses and cycling performance. Medline, Science Direct, Cochrane Library, and SPORTDiscus online databases were searched. Nineteen articles met the...

A obra intitulada “Avanços dos estudos científicos na área das ciências exatas vol.01”, publicada pela Brazilian Journals, apresenta um conjunto de vinte e um capítulos que visam abordar assuntos relacionados com a área das ciências exatas. A seguir são apresentados os trabalhos que compõem o livro. Logo, os artigos apresentados neste volume aborda...

The addition of manual pressure on the electrode during neuromuscular electrical stimulation (NMES) has been used to reduce current intensity and perceived discomfort. In this study we aimed to test i) whether this approach affect the reliability of commonly made torque output measurements and ii) whether subcutaneous-fat thickness influence the ef...

Mat Pilates has become an attractive alternative exercise among older women, however, despite knowing the importance of regular exercise, interrupting training is a common issue in this population. The aim of the current study was to evaluate the effects of 6-weeks of detraining after a period of 12-weeks of training with Mat Pilates on the functio...

Introduction The present study aimed to analyze the acute effects of a myofascial release session (MFR) with a portable electric massager (PEM) at different frequencies (25 Hz and 52 Hz) on the superficial and deep fascial motion. Methods The limbs of fourteen participants (12 men and 2 women, age = 34 ± 10 years; height = 1.74 ± 0.09 m; weight =...

Background Echo intensity (EI) can be useful to check muscle quality and has been widely used to identify tissue damage. In the clinical and sports context, it has been used to identify metabolic disorders and training muscle performance.Objective To determine whether subcutaneous adipose thickness (SAT) influences the inter-session EI reliability...

This study aimed to verify the effect of a pace training session at an intensity corresponding to the kick frequency at the anaerobic threshold (KFAT) on the internal load response and motor response performance of the roundhouse kick. Twelve black belt taekwondo athletes underwent two evaluation sessions: (1) performed the progressive specific tes...

To verify the combined and isolated effects of alcohol consumption and one night of sleep deprivation on maximal strength, muscle endurance and aerobic performance. Also, to verify the association between perceived fatigue and exercise performance. Ten male participants were randomized into four conditions: (1) placebo consumption + normal sleep (P...

Cessation of resistance training could result in loss of the gains acquired. Therefore, the aim of the current study was to verify the effect of 1-year of detraining following resistance training on body composition, functional capacity, handgrip strength, localized muscular endurance, and countermovement jump performance (CMJ) in older adults. Fif...

Introdução: A intensidade do eco (IE) pode ser obtida por meio da ultrassonografia a partir de reflexões de ondas ecográficas do tecido. Este parâmetro tem despertado a atenção de pesquisadores por ser representativo da composição muscular, e indicador da qualidade muscular. Dessa forma, tem sido amplamente utilizado para identificar danos nos teci...

Introdução: A análise da intensidade do eco (IE) pode ser obtida por meio da ultrassonografia a partir de reflexões de ondas ecográficas do tecido e vem sendo amplamente utilizada para identificar danos nos tecidos no contexto clínico e desportivo. As mulheres podem ter mais tecido adiposo que homens, o que pode refletir em maior infiltração de gor...

Background: Different periodization models have been widely used to improve maximum and rapid force in aging adults. However, it is unclear if some specific model can influence the remarkable heterogeneity of responsiveness to rapid torque improvements following resistance training. Aims: Compare the effects of mixed session periodization (MSP) and...

Abstract: Background Diferent periodization models have been widely used to improve maximum and rapid force in aging adults. However, it is unclear if some specifc model can infuence the remarkable heterogeneity of responsiveness to rapid torque improvements following resistance training. Aims: Compare the efects of mixed session periodization (M...

Objective: High-intensity intermittent exercise (HIIE) may enhance the anti-inflammatory status. The juçara fruit juice (JFJ) has well-established antioxidant and anti-inflammatory properties. In this study, the effect of juçara fruit juice (JFJ) consumption on the inflammatory response to HIIE in physically active subjects was investigated. Method...

Aims: By using different series of linear mixed models we investigated the influence of muscle strength gains on functional capacity (FC) improvements in older adults following resistance training (RT). Methods: Eleven healthy older adults performed a 12-week non-linear periodization leg press RT program. Leg press one-repetition maximum (1-RM), qu...

New devices with clinical applicability are needed to provide fast and precise diagnostics. In this way, the aim of this study was to verify the reliability of the portable electrical impedance myograph (PEIM) Skulpt® for morphological measures of the vastus lateralis (VL). MATERIALS AND METHODS: A cross-sectional evaluation was designed on an inde...

RESUMO O objetivo foi analisar o perfil das teses e seus artigos em relação às áreas de concentração do PPGEF/UFSC. Analisaram-se 103 teses e 196 artigos (2009-2019), das áreas: Biodinâmica do Desempenho Humano (BDH), Teoria e Prática Pedagógica (TPP) e Atividade Física e Saúde (AFS). Dentre as teses defendidas, predominaram as temáticas relacionad...

Background: The effects of interventions with muscle power training on balance and functionality in individuals with T2DM are still poorly investigated. We evaluated the efficacy of a twelve-week power training program in the functional capacity, balance and lower limb muscle power and strength of elderly with T2DM. Methods: Twenty-one subjects...

Background The performance of Brazilian jiu-jitsu (BJJ) fighters is dependent on rapid and maximal elbow strength actions. Appropriate strength balance between elbow flexors (F) and extensors (E) across the full joint range of motion may be required to decrease risk of injuries. Aim: To compare rapid and maximal elbow F/E strength balance through f...

The present study aimed to compare the activation of the lower lumbar erector spinae, gluteus maximus, biceps femoris, and rectus femoris in two trunk positioning (straight, and inclined) during three lunge exercises (static, step-forwarding, and walking) in trained young women. Twelve women (24 ± 3 years) were selected and then performed, in a ran...

The linear tapering method duration can be determinant for sport performance. Objective.-The objective of this study was to analyze the effect of linear tapering duration method on anaerobic power and capacity in road cyclists. Materials and methods.-Seventeen male road cyclists, aged between 18 and 30 years were randomly selected within the study...

Objective The purpose of this study was to assess whether dry needling (DN) added to photobiomodulation (PBM) has effects on the treatment of active myofascial trigger points in the upper trapezius. Methods This study was a randomized clinical trial, with 43 participants divided into 3 groups: DN and PBM (DNP), DN, and DN outside of the trigger po...

Purpose Given the increasing research interest in ultrasound plantar aponeurosis (PA) thickness measurements, we aimed to analyze the inter and intra-rater reliability of independent sonograms and to identify the error related to the image analysis procedure. Methods Twenty-one healthy men participated in this study. Imaging of PA consisted of two...

Cycling ergometer protocols are commonly integrated with a virtual reality environment (VRE), especially because of its static position that also allows multiple exercise experiments. Concerning VRE scenarios, visually delayed situations like the ones produced at excessive low update rates can also affect the sense of presence and physiological res...

Background and purpose Unusual eccentric exercise (EE) may affect muscle ability to produce rapid force. Previous study suggested that short-term mate tea (MT) consumption may enhance muscle strength recovery from EE, but MT benefits on the rate of torque development (RTD) are unknown. This study investigated the effect of MT on RTD and muscle dama...

This study compared the differences in neural and muscular mechanisms related to explosive torque in chronically strength‐trained young and older men (>5 years). Fifty‐four participants were allocated into four groups according to age and strength training level: older untrained (n=14; 65.6±2.9 years), older trained (n=12; 63.6±3.8 years), young un...

Purpose This study compared sex-related affective responses during resistance training performed to concentric failure. Methods The study was a non-randomized trial (quasi-experimental study). Well-trained young participants were allocated into two groups according to sex (Women, n=7, 21.1±6.0 years, 57.6±5.0 kg; and Men, n=7, 28.3±5.7 years, 88.3...

O objetivo da presente investigação foi analisar o efeito de dois diferentes tipos de periodização (ondulatória e linear) sobre o desempenho de nadadores. Trinta e nove jovens nadadores do sexo masculino foram selecionados de forma não probabilística e divididos proporcionalmente e randomicamente em dois grupos: periodização ondulatória (PO, n=19)...

Purpose This study aimed to verify the relationship between bilateral lower limb asymmetry and performance in the Special Judo Fitness Test (SJFT). Methods Twelve male judo athletes (23.0 ± 3.9 years) participated in this study. Athletes irst performed ultrasonography assessments and unilateral countermovement jumps (CMJ), and 48 h after they perfo...

PurposeThis study investigated the relationship between habitual nutritional intake and the responsiveness of elderly individuals to resistance training.Methods Nineteen participants (66.0 ± 4.5 years) completed body composition (dual-energy X-ray absorptiometry), functional capacity (timed-up-and-go, stair ascent, and stair descent), and neuromusc...

Background The current literature indicates that functional capacity is associated with physical performance and body composition measurements in older adults. However, it is not clear which tests can best explain the functional capacity in this population. This study aimed to investigate the physical performance and body composition determinants o...

O objetivo da presente investigação foi analisar o efeito de dois diferentes tipos de periodização (ondulatória e linear) sobre o desempenho de nadadores. Trinta e nove jovens nadadores do sexo masculino foram selecionados de forma não probabilística e divididos proporcionalmente e randomicamente em dois grupos: periodização ondulatória (PO, n=19)...

Walking is often utilized as an exercise method to improve cardiorespiratory fitness. Although critical speed (CS) has been recognized as a practical marker of training intensity, biomechanical and energetic responses in different percentages of CS on walking are poorly explored. The aim of the present study was to compare oxygen consumption (VO2),...

Introdução: O fruto juçara provém da palmeira Euterpe edulis Martius, uma espécie da Mata Atlântica brasileira. Devido à sua elevada atividade antioxidante, conferida especialmente pela presença de antocianinas, o fruto juçara pode oferecer proteção antioxidante durante o exercício. Objetivo: Avaliar o efeito do consumo agudo do suco de juçara (Eut...

Objective: The aim of this study was identifying the best energy dose of photobiomodulation therapy (PBMT) able to improve muscle performance and reduce fatigue during a multiple-set knee extension exercise. Methods: Eighteen physically active men participate in this study. Each participant performed an isokinetic exercise protocol (5 sets of 10 kn...

Objective: The aims of the present study were to verify the effects of photobiomodulation therapy (PBMT) on time trial run performance over 1,500-m, as well as on individual responsiveness of recreative runners. Methods: Nineteen recreationally-trained runners participated in a randomized, crossover, double-blind, placebo-controlled trial. The stud...

This study aimed to evaluate the effects of juçara juice on oxidative stress biomarkers and fatigue in a high-intensity interval training (HIIT) session. Fifteen physically active men were assigned to drink 250 mL of juçara juice or water (control) 1 h before exercise. Blood samples were collected 1 h prior to exercise, immediately post exercise, a...