SHORT-TERM EFFECTS OF 3 DAYS INTENSIVE WHOLE BODY VIBRATION EXPOSURE ON MUSCULAR ACTIVATION STRATEGIES
Keywords: maximum voluntary contraction, electromyography, vibration
AbstractThe aim of this study was to investigate 3-days intensive whole body vibration (WBV) exposure on activation strategies of lower extremity muscles. For this purpose, six male athletes’ dominant leg muscles (Tibialis Anterior(TA), Gastrocnemious Medialis(GM), Vastus Medialis(VM), Rectus Femoris(RF), Vastus Lateralis(VL) and Biceps Femoris(BF)) were recruited voluntarily. Before the trails their baseline electromyography (EMG) values were taken for reference evaluation. After that, they were trained static semi-squat position with 120o knee flexion angle on vibration platform (vertical vibration; 4 mm(high), 30 Hz), during 3 days. The subjects were exposed to vibration 6 times for duration of 60 seconds with a 2 minutes rest between each treatment. Consequently, 3 days intensive WBV exposure caused a progressive increase in EMG activity (P<0.05).
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