Tensiomyography를 이용한 보디빌더 근육의 특성 분석

Abstract

The aim of this study is to evaluate the contractile properties of thigh muscles in bodybuilders throughtensiomyography (TMG). Our hypothesis is that maximal displacement (Dm) in bodybuilders would be lower thanin controls because Dm is increased when the muscle is stiffed or hypertrophied. Nine bodybuilder athletes and15 university students were assessed by TMG. The biceps femoris (BF), semitendinosus (ST), vastus lateralis, vastusmedialis (VM), and rectus femoris (RF) were evaluated. The TMG parameters obtained for each muscle were Dm,contraction time (Tc). And we calculated contraction velocity (Vc) as the rate of the radial displacement occurringduring the time period of Tc with respect to Tc. Dm values of all muscles in bodybuilders were significantly highercompared to the control group. There were no significant differences in Tc values of most muscles except rightBF and ST muscles. Vc values of VM, RF, and ST muscles were lower in bodybuilders than in the control group. This is the first report about TMG assessment of muscle hypertrophy. We found that Dm was most effective indetecting muscle hypertrophy and muscle stiffness secondary to muscle hypertrophy could induce decrease in Dmand Vc.