Fernando Diefenthaeler

Fernando Diefenthaeler
Federal University of Santa Catarina | UFSC · Departamento de Educação Física

PhD
Associate Professor at Universidade Federal de Santa Catarina

About

336
Publications
86,945
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Introduction
I received my PhD degree in Human Movement Sciences from Federal University of Rio Grande do Sul. I am an associate professor at Center of Sports and Postgraduate Program in Physical Education of the Federal University of Santa Catarina. My research over the last ten years has focused on cycling biomechanics and fatigue during human movement.
Additional affiliations
December 2015 - March 2017
The University of Calgary
Position
  • Professor
March 2010 - present
Federal University of Santa Catarina
Position
  • Professor (Associate)
April 2007 - November 2007
University of Texas at Austin
Position
  • Laboratory technician
Description
  • Laboratory technician for a project involving fatigue (EMG and pedal forces)
Education
March 2006 - June 2009
Universidade Federal do Rio Grande do Sul
Field of study
  • Human Movement Sciences
March 2002 - October 2004
Universidade Federal do Rio Grande do Sul
Field of study
  • Human Movement Science
March 2000 - March 2001
Universidade Federal do Rio Grande do Sul
Field of study
  • Exercise Physiology

Publications

Publications (336)
Chapter
Full-text available
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...
Article
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...
Article
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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...
Article
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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...
Article
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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...
Article
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),...
Article
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...
Article
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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...
Chapter
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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...
Article
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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...
Article
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...
Article
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 =...
Article
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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...
Article
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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...
Article
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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...
Article
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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...
Conference Paper
Full-text available
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...
Article
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...
Article
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...
Article
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...
Article
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...
Article
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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...
Article
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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...
Article
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...
Article
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...
Article
Full-text available
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...
Article
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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...
Article
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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...
Article
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...
Article
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...
Article
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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...
Article
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...
Article
Full-text available
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...
Article
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...
Article
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...
Article
Full-text available
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)...
Article
Full-text available
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...
Article
Full-text available
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...
Article
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...
Article
Full-text available
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)...
Article
Full-text available
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),...
Conference Paper
Full-text available
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...
Article
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...
Article
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...
Article
Full-text available
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...
Article
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Objective: To discuss the validity of the electromyography threshold identified during an incremental cycle ergometer protocol. Method: Critical review of the main articles in the literature, with additional check for the last references by Pubmed / MEDLINE databases. Results: Surface electromyography showed to be a valid method for determining the...
Article
Objective: To investigate the effects of Photobiomodulation therapy (PBMT) on resistance training volume and discomfort of well-trained adults. Background: PBMT has been used to attenuate fatigue in several physical exercise topics. However, it is unclear if PBMT can increase volume and reduce discomfort in resistance training well-trained individu...
Article
Purpose: The objective of this study was to analyze the effects of a conditioning activity (CA) composed of continuous countermovement jumps on twitch torque production and 30-m sprint times. Methods: A total of 12 sprint athletes, 10 men (23.5 [7.7] y) and 2 women (23.0 [2.8] y), volunteered to participate in this study. The participants were e...
Conference Paper
Full-text available
INTRODUÇÃO Safe Runner Indoor é um APP com baixo custo e fácil aplicação desenvolvido para (1) identificar parâmetros de carga interna e externa durante o teste incremental de corrida, (2) avaliar a capacidade e potência aeróbia e (3) controlar as adaptações aeróbias. No entanto, ainda não foi verificado a validade ecológica do APP. Portanto, este...
Poster
Full-text available
INTRODUÇÃO Safe Runner Indoor é um APP com baixo custo e fácil aplicação desenvolvido para (1) identificar parâmetros de carga interna e externa durante o teste incremental de corrida, (2) avaliar a capacidade e potência aeróbia e (3) controlar as adaptações aeróbias. No entanto, ainda não foi verificado a validade ecológica do APP. Portanto, este...
Conference Paper
Full-text available
Introdução: O chute semicircular é muito usado nas diferentes modalidades de esportes de combate. A performance é associada a parâmetros temporais como tempo de resposta (TRESP), definido como o tempo entre a apresentação do estímulo até o momento que o golpe atinge o alvo. Objetivo: Verificar quais parâmetros determinam o desempenho da resposta mo...
Conference Paper
Introdução: A fadiga neuromuscular durante a taxa de desenvolvimento de torque máxima e submáxima (TDTMAX e TDTSUB) ao realizar treinamento resistido isométrico balístico ou sustentado (TIB e TIS) é desconhecida em idosos. Objetivo: Avaliar a fadiga neuromuscular durante protocolo TIB e TIS com baixa repetição. Métodos: Sete idosos saudáveis volunt...
Article
Full-text available
Purpose This study investigated the effect of 12 weeks of mat Pilates intervention (60 min sessions, three times per week) on lower limb rate of force development (RFD) parameters (absolute and relative values and contractile impulse) in physically active and overweight elderly women. Methods Fourteen elderly women (age 62 ± 3 years) participated...
Conference Paper
Full-text available
This study aimed to determine the breakpoints in superficial electromyography (sEMG) signal during a maximal incremental skating test (IT) and compare them to the first (VT1) and second (VT2) ventilatory threshold. Ten well-trained long track speed skaters performed a maximal incremental skating test on a slide board. sEMG signals from six lower li...
Article
The purpose of the present study was to investigate the volume-dependence of upper-body strength performance improvement; and the retention effects after detraining in aging adults. Eighteen healthy untrained middle-aged volunteers were randomized into two groups: low volume (LV), mean=494 kg, and high volume (HV), mean=686 kg, load. Participants w...
Article
Full-text available
Fatigue and muscle damage negatively affect performance in lower limb exercises involving the stretch-shortening cycle in judo athletes during competition and training sessions. Photobiomodulation therapy has emerged as an effective non-invasive strategy to attenuate fatigue and muscle damage when applied before different types of exercises. Our ob...
Article
Full-text available
PURPOSE: Photobiomodulation therapy (PBMT) has emerged as an effective non-invasive strategy to attenuate fatigue and muscle damage when applied before different types of exercises; however, there is no evidence regarding PBMT effects on fatigue and muscle damage in judo athletes. Thus, the aim of our study was to investigate the PBMT effect on fat...
Conference Paper
Full-text available
Introdução: A força muscular pode ser influenciada por diversos fatores relacionados à qualidade muscular (QM), dentre eles a quantidade de tecido contrátil e adiposo presente na musculatura. Contudo, mesmo com algumas evidências relacionando a força muscular e a QM em idosos, ainda não está claro na literatura esse tipo de associação em indivíduos...
Conference Paper
Full-text available
INTRODUÇÃO: A plantiflexão é amplamente utilizada na Ginástica Rítmica (GR). Essa demanda faz com que ginastas desenvolvam considerável força em comprimentos mais encurtados dos músculos plantiflexores. Contudo, deve-se considerar a ação dos dorsiflexores e a manutenção da estabilidade articular. OBJETIVO: Avaliar a razão EMG/Torque e o Índice de C...
Conference Paper
Full-text available
Introdução: A locomoção em escadas está entre as mais desafiadoras e perigosas tarefas funcionais na vida diária de idosos e constitui aproximadamente 10% dos acidentes fatais nesta população. Objetivo: Correlacionar indicadores de quedas com a distância em que o pé passa do degrau durante a locomoção em escadas em idosos saudáveis. Materiais e mét...
Conference Paper
Full-text available
Introdução: A terapia com fotobiomodulação (TCF) pode induzir mudanças bioquímicas nas células, principalmente na mitocôndria. Apesar disto, pouco se sabe sobre os efeitos ergogênicos da TCF em exercícios aeróbios, especialmente em ambientes não controlados. Objetivo: Verificar os efeitos da TCF no desempenho de corrida de 1500-m e analisar a respo...
Conference Paper
Full-text available
Resumo: A força efetiva (FE) é a componente da força aplicada perpendicularmente ao pedivela que produz torque positivo. A FE representa a efetividade da pedalada e pode ser influenciada por vários fatores, como por exemplo, a cadência de pedalada. Diante disso, o presente estudo teve como objetivo comparar a FE durante testes máximos com diferente...
Conference Paper
Full-text available
Resumo: Durante competições de ciclismo a fadiga provoca reduções na capacidade de gerar força e na técnica de pedalada, podendo assim aumentar a assimetria bilateral. O objetivo deste estudo foi avaliar a assimetria na produção de força dos membros inferiores de ciclistas durante um teste máximo até a exaustão. O estudo foi aprovado pelo Comitê de...
Chapter
The quasi-static elastography is a technique used to generate real-time images of elastic properties of the biological tissue. However, quasi-static mode is operator-dependent, which may generate limitations in its reproducibility and reliability. The purposes of this study were to compare the elasticity index (E) between two different muscle regio...
Preprint
BACKGROUND The TReaction app purposes to determine strike response time with a low cost and easy application in combat sports. However, there is a need to verify the validity and accuracy of the response time obtained by the TReaction app. OBJECTIVE To test the validity and reliability of the TReaction app in measuring the motor response time in c...