Abstract
INTRODUCTION:
The rate of force development (RFD) is increased by high-load isometric resistance training (RT), whereas not by low-load isometric RT. However, it is unknown whether low-load isometric RT with neuromuscular electrical stimulation (NMES) can increase the RFD.
PURPOSE:
The aim of this study was to clarify the short-term effects of low-load isometric RT with NMES on the RFD.
METHOD:
Twenty-four healthy subjects randomly received both low-load RT of the hip abductor muscles with NMES and sham NMES condition. The RFD of the homonymous muscles was assessed at pre- and post-intervention. Time intervals of the RFD were set to 0–50 ms (50RFD), 0–100 ms (100RFD), 0–200 ms (200RFD), and 0–300 ms (300RFD). Two-way repeated measures analysis of variance was used to analyze the effects of time and intervention.
RESULT:
Low-load RT with NMES significantly increased 50 and 100RFD compared to sham NMES condition. On the other hand, 200 and 300RFD were not changed by either condition.
CONCLUSIONS:
The significantly increased RFD might be related to the factors affecting each RFD interval. This finding might have an important clinical implication for developing a mechanism-based effective training.
Keywords
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