Abstract:Rev Bras Cineantropom Desempenho Hum 2010, 12(1):62-67Resumo -O índice de tensão específica (ITE) estima a relação entre o torque máximo (TQ) e o volume muscular (VM) para uma tarefa específica, e inclui a espessura muscular (EM) como um parâmetro medido diretamente pela ultrassonografia. O objetivo do presente estudo foi comparar o VM, TQ e ITE dos flexores do cotovelo entre indivíduos treinados e não treinados em força. Participaram do estudo 40 homens, sendo 11 treinados em força há pelo menos dois anos [gr… Show more
“…Ultrasonography has lately been used in research as a way to assess muscle damage and the muscle volume 6,8 . Studies have applied this technique both in trained subjects as untrained by the assessment of muscle thickness, which variation was associated with the occurrence of edema in the post-workout period 9,10 . Several studies 1,[11][12][13] already reported the response of many biomarkers after strength training, but studies using low cost diagnostic imaging tools (as ultrasonography and thermography) are rare.…”
Section: Introductionmentioning
confidence: 99%
“…Several studies 1,[11][12][13] already reported the response of many biomarkers after strength training, but studies using low cost diagnostic imaging tools (as ultrasonography and thermography) are rare. authors 14 have reported a high correlation in the diagnosis of handle repetitive strain injuries (RSI) and work-related musculoskeletal disorders (WMSD) between the assessment by ultrasound and thermography, however, although there are studies evaluating muscle recovery through ultrasound 9,10 or by thermography 1,4 in isolation but there is no known correlation between the results of these assessment tools in the muscular aguda ( post-workout period or the best period to use one or another. Thus, the aim of this study was to evaluate the usage of skin temperature and muscle thickness (MT) to monitoring the muscle response (until 96 hours) to high-intensity strength training.…”
Introduction: Several studies already reported the response of many biomarkers after strength training, but studies using low cost diagnostic imaging tools are rare. Objective: To evaluate the usage of skin temperature and muscle thickness (MT) to monitor muscle response (until 96 hours after) to high-intensity strength training. Methods: This is a short-term longitudinal study with 13 trained, healthy male volunteers. Volunteers performed five sets of biceps bi-set exercise with their dominant arm with dumbbells, with load of 70% of one-repetition maximum (1RM). The ultrasound (US) and thermal images were acquired before and immediately after the last set, 24, 48, 72 and 96 hours after exercise. Results: The analysis was divided in two stages: acute muscle response (until 24 hours after training) and delayed muscle response (from 24 to 96 hours after training). The elbow flexors thickness showed the peak value immediately after the last set of training. Skin temperature (on elbow flexors) and the elbow flexors thickness grew continuously from 24 to 96 hours after strength training. There is a high correlation (r=0.941, p=0.017) between skin temperature and muscle thickness from the end of exercise until 96 hours after strength training. Conclusions: The US images showed high sensibility for muscle physiological changes on the first 24 hours after exercise. On the other hand, the thermal images had higher sensibility for muscle physiological changes than US images from 24 to 96 hours after training.
“…Ultrasonography has lately been used in research as a way to assess muscle damage and the muscle volume 6,8 . Studies have applied this technique both in trained subjects as untrained by the assessment of muscle thickness, which variation was associated with the occurrence of edema in the post-workout period 9,10 . Several studies 1,[11][12][13] already reported the response of many biomarkers after strength training, but studies using low cost diagnostic imaging tools (as ultrasonography and thermography) are rare.…”
Section: Introductionmentioning
confidence: 99%
“…Several studies 1,[11][12][13] already reported the response of many biomarkers after strength training, but studies using low cost diagnostic imaging tools (as ultrasonography and thermography) are rare. authors 14 have reported a high correlation in the diagnosis of handle repetitive strain injuries (RSI) and work-related musculoskeletal disorders (WMSD) between the assessment by ultrasound and thermography, however, although there are studies evaluating muscle recovery through ultrasound 9,10 or by thermography 1,4 in isolation but there is no known correlation between the results of these assessment tools in the muscular aguda ( post-workout period or the best period to use one or another. Thus, the aim of this study was to evaluate the usage of skin temperature and muscle thickness (MT) to monitoring the muscle response (until 96 hours) to high-intensity strength training.…”
Introduction: Several studies already reported the response of many biomarkers after strength training, but studies using low cost diagnostic imaging tools are rare. Objective: To evaluate the usage of skin temperature and muscle thickness (MT) to monitor muscle response (until 96 hours after) to high-intensity strength training. Methods: This is a short-term longitudinal study with 13 trained, healthy male volunteers. Volunteers performed five sets of biceps bi-set exercise with their dominant arm with dumbbells, with load of 70% of one-repetition maximum (1RM). The ultrasound (US) and thermal images were acquired before and immediately after the last set, 24, 48, 72 and 96 hours after exercise. Results: The analysis was divided in two stages: acute muscle response (until 24 hours after training) and delayed muscle response (from 24 to 96 hours after training). The elbow flexors thickness showed the peak value immediately after the last set of training. Skin temperature (on elbow flexors) and the elbow flexors thickness grew continuously from 24 to 96 hours after strength training. There is a high correlation (r=0.941, p=0.017) between skin temperature and muscle thickness from the end of exercise until 96 hours after strength training. Conclusions: The US images showed high sensibility for muscle physiological changes on the first 24 hours after exercise. On the other hand, the thermal images had higher sensibility for muscle physiological changes than US images from 24 to 96 hours after training.
Introduction: Studies comparing periodization models in sequences that begin with small muscle group and progressed toward large muscle group in untrained subjects in resistance training are scarce. Objective: The purpose of this study was to compare the effects of ondulatory periodization and linear periodization models on maximum strength and muscular hypertrophy in a muscle group increasing exercise sequence. Methods: Twenty-nine men with no experience in RT were randomly assigned into three groups: ondulatory periodization (OP, n = 10), linear periodization (LP, n = 13), and control group (CG, n = 9). The individuals performed 1RM tests in four exercises: biceps curl (BC), triceps extension (TE), lat pull down (LPD) and bench press (BP) and evaluations of maximum voluntary isometric contraction (MVIC), muscle thickness of elbow flexors (EF) and elbow extensors (EE) before and after the 12 weeks of training were carried out. The OP group varied in volume and intensity on a daily basis, while LP group varied every four weeks. The CG did not perform ST. A two-way ANOVA with repeated measures and the effect size (ES) were used to analyze muscle thickness, 1RM load improvement in each of the four exercises and the MVIC between groups. Results: The major findings of this study were: 1) OP showed major ES for 1RM of BC and TE and for muscle thickness of EF and EE when compared with LP.3) The ES data did not show significant differences for BP and LPD which finished the training session. Conclusions: We conclude that both periodization models were efficient at improving strength gains and muscular growth. However, ES data show that OP promotes major gains in strength for exercises that are positioned at the beginning of the session and hypertrophy.
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