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adaptações neuromusculares a 8 semanas de treinamento de força: o modo isotônico contra isocinético
abstract previous studies attempted to compare the evectiveness of isokinetic and isotonic training. however, they have provided conxicting results. the purpose of this study was to compare the evects of isotonic versus isokinetic standardized concentric strength training programs of the knee extensors on the neuromuscular system. the standardization of these two training programs was ensured by the equalization of the total external amount of work performed and the mean angular movement velocity. thirty healthy male students were randomly assigned to the isotonic (it; n = 11), the isokinetic (ik; n = 11) or the control (c; n = 8) group. both it and ik groups trained their dominant lower leg 3 sessions/week for 8 weeks on a dynamometer. the it group exercised using a preset torque of 40% of the maximal voluntary isometric torque at 70° (0° = leg in horizontal position). the ik group exercised at a velocity ranging between 150° and 180° s¡1. isotonic, isokinetic and isometric tests were performed on a dynamometer before and after strength training. surface electromyographic activity of vastus lateralis, vastus medialis, rectus femoris, semitendinosus and biceps femoris muscles was recorded during the tests. signiwcant strength increases in both dynamic and static conditions were noticed for it and ik groups without any signiwcant diverence between the two trained groups. agonist muscle activity also increased with training but no change in antagonist muscle co-activity was observed. the two training methods could be proposed by clinicians and athletic coaches to improve concentric muscle strength in dynamic and static conditions.
Senast uppdaterad: 2013-05-18
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essa constante exposição ao treinamento de força possivelmente promove adaptações, minimizando as respostas ao estresse.
this constant exposure to strength training possibly promotes adaptations, minimizing the responses to stress.
o treinamento de força também pode ser considerado, pois pode aumentar a massa muscular e fortalecer seus ossos.
strength training can also be considered, as it can increase muscle mass and strengthen your bones.
assim, esse indicador isolado não constitui um meio eficaz para verificar o estresse cardiovascular no treinamento de força.
therefore, this isolate indicator does not constitute an efficient way to verify the cardiovascular stress in strength training.
treinar com peso é uma excelente forma de treinamento de força e dá aos jogadores de rugby uma ampla gama de benefícios.
weight training is an excellent form of strength training which provides a comprehensive range of benefits to the rugby player. however, not all players will have access to weight training facilities at the training ground or at a local gym or sports centre.
ainda, vários estudos demonstraram que o treinamento de força traz benefícios importantes nas esferas fisiológica, funcional e psicológica.
furthermore, many investigations have demonstrated that strength training results in significant physiological, functional, and psychological benefits.
a associação do ea ao treinamento de força resultou em maior hipertrofia muscular e concentrações proteicas em fibras com características glicolíticas.
the as association with strength training resulted in greater muscle hypertrophy and protein concentrations in fibers with glycolytic characteristics.
alguns treinamento de força também podem ser úteis. o exercício físico regular pode ajudar seu corpo a queimar calorias extras.
some strength training can also be helpful. regular physical exercise can help your body burn extra calories.