Abstract Knee osteoarthritis (OA) is associated with quadriceps atrophy and weakness, so muscle strengthening an important point in the rehabilitation process. Since pain joint stiffness make it often difficult to use conventional strength exercises, neuromuscular electrical stimulation (NMES) may be alternative approach for these patients. This study was aimed at (1) identifying associations of knee OA architecture strength, (2) quantifying effects a NMES training program on parameters. In...

Evidence indicates that low-level laser therapy (LLLT) minimizes fatigue effects on muscle performance. However, the ideal LLLT dosage to improve athletes'performance during sports activities such as cycling is still unclear. Therefore, goal of this study was investigate different dosages cyclists'performance in time-to-exhaustion tests. In addition, frequency content EMG signals assess mechanisms were examined. Twenty male competitive cyclists participated a crossover, randomized,...

Knee peak torque (PT) is associated to jump performance in volleyball players. It not clear whether muscle strength imbalances of the knee joint can influence performance. The purpose study was analyse association between PT and muscular with professional Eleven elite male players (90.3 ± 9.7 kg body mass 1.94 0.06 m height) were evaluated an isokinetic dynamometer at speeds 60, 180 300 deg/s. Muscle obtained through calculation contralateral deficit limbs conventional ratio...

Dellagrana, RA, Rossato, M, Sakugawa, RL, Baroni, BM, and Diefenthaeler, F. Photobiomodulation therapy on physiological performance parameters during running tests: Dose-response effects. J Strength Cond Res 32(10): 2807-2815, 2018-This study was aimed at verifying effects of photobiomodulation (PBMT) with different energy doses (15, 30, 60 per site) tests. Fifteen male recreational runners participated in a crossover, randomized, double-blind, placebo-controlled trial. They performed...

Abstract Rossato, M, Dellagrana, RA, Sakugawa, RL, Lazzari, CD, Baroni, BM, and Diefenthaeler, F. Time response of photobiomodulation therapy on muscular fatigue in humans. J Strength Cond Res 32(11): 3285–3293, 2018—The aim this study was to identify the effects 2 different time responses knee extensor. Sixteen male volunteers (26 ± 6.0 years, 81 12 kg, 181 7.4 cm) participated study. Participants performed same protocol 5 sessions {control, placebo (placebo applied both 6 hours before...

Abstract Both injury history and eccentric knee flexor strength have been associated with risk of football players sustaining hamstring strain (HSI). However, it remains unclear whether who sustained HSIs in the prior season present persistent deficits. Therefore, aim study was to verify professional male without HSI season. This case–control assessed 210 from 10 Brazilian clubs: 182 included control group 28 previously injured group. Players had suffered unilateral We measured flexors peak...

Objective Chronic pain associated with osteoarthritis (OA) often leads to reduced function and engagement in activities of daily living. Current pharmacological treatments remain relatively ineffective. This study investigated the efficacy photobiomodulation therapy (PBMT) on cartilage integrity central biomarkers adult male Wistar rats. Design We evaluated degradation spinal cord sensitization using monoiodoacetate (MIA) model OA following 2 weeks delayed PBMT treatment (i.e., 15 days...

Although previous studies have demonstrated that skeletal muscle adaptations were specific to the types of stimuli, eccentric training presented controversial results concerning strength gains in eccentric, isometric and concentric tests. The

Objective: The aims of this study were to verify the effects photobiomodulation therapy (PBMT) on time trial run performance over 1500 m, as well individual responsiveness recreative runners. Materials and methods: Nineteen recreationally trained runners participated in a randomized, crossover, double-blind placebo-controlled trial. was divided four sessions: (1) incremental maximal running test; (2) m control (without placebo or PBMT); (3, 4) PBMT before run. applied 14 sites per lower limb...

The objective of this study was to evaluate effects photobiomodulation therapy (PBMT) on the 3000 m running performance (primary outcome), economy (RE), metabolic cost and ratings perceived exertion during (secondary outcomes). Twenty male endurance athletes performed 4-min treadmill rectangular test at 12 km.h-1 monitored by a gas analyser. After that, PBMT or placebo in each lower limb applied, followed maximum m. Immediately after test, repeated test. Another application PBMT/placebo done...

Objective: The aim of this study was to identify the best energy dose photobiomodulation therapy (PBMT) able improve muscle performance and reduce fatigue during multiple-set knee extension exercise. Methods: Eighteen physically active men participated in study. Each participant performed an isokinetic exercise protocol (5 sets 10 repetitions, maximum contractions at 60°·s-1) 6 sessions, 1 week apart. Control condition (no PBMT/placebo treatments) applied first sixth sessions. Placebo or...

INTRODUÇÃO: A entorse de tornozelo é uma lesão alta incidência comumente tratada com períodos imobilização, levando a adaptações estruturais e funcionais dos músculos atuantes nesta articulação. OBJETIVO: Identificar as flexores dorsais plantares após duas semanas imobilização em sujeitos que sofreram tornozelo. MÉTODOS: Onze indivíduos (seis mulheres cinco homens) acometidos por grau II foram submetidos 14 dias tala gessada. Após retirada da realizadas avaliações bilaterais (1) perimetria...

This study aimed to verify the hamstring flexibility, strength, and fascicle length of football (soccer) players with without history strain injury (HSI) in prior season. Eighty male (45 from senior category 35 under-20 category) were included this case–control trial: 20 unilateral HSI season, 60 free Passive straight-leg raise (PSLR) test, isokinetic dynamometry, biceps femoris long head (BFLH) ultrasonography performed at preseason identify risk factors for HSI. No significant differences...

The goal of this study was to investigate the effects photobiomodulation therapy (PBMT) on performance, oxygen uptake (VO2) kinetics, and lower limb muscle oxygenation during three successive time-to-exhaustions (TTEs) in cyclists. This a double-blind, randomized, crossover, placebo-controlled trial study. Sixteen cyclists (~23 years) with cycling training volume ~460 km/week volunteered for In first session, performed maximal incremental test determine power output (POMAX). following...

We investigated the effects of binge drinking on maximal strength, time to exhaustion during a high-intensity isometric fatigue protocol, and neuromuscular responses elbow flexor muscles. Ten young male participants were randomized in two conditions: (1) alcohol consumption (ALC) or (2) placebo (PLA). In each condition, volunteers ingested 1g per kg body mass alcoholic beer non-alcoholic Neuromuscular performance (elbow flexors peak torque – TTE - an protocol at 70% torque) EMG parameters...

Este estudo objetivou verificar a influência do nível competitivo e da posição tática sobre parâmetros relacionados ao desempenho aeróbio de atletas profissionais futebol. Foram analisadas 453 avaliações ergoespirométricas futebol (42 goleiros, 92 zagueiros, 61 laterais, 174 meio-campistas 84 atacantes) que atuavam em quatro níveis competitivos: Campeonato Nacional Série A; B; C; Estadual. Não foram encontradas diferenças nos valores médios consumo máximo oxigênio (VO2max) segundo limiar...