筋エネルギー代謝に及ぼすウォーミングアップ運動の影響

抄録

To investigate the effect of warm-up exercise on the kinetics of inorganic phosphate (Pi) and phosphocreatine (PCr) during exercise, six healthy males performed knee flexion exercise for 4 min at 60% of maximal work rate. The exercise was followed by warm-up exercise in the warming-up (W) trial, but not in the without warming-up (C) trial. The Pi and PCr in biceps femoris muscles were estimated by 31 phosphorus nuclear magnetic resonance spectroscopy (^<31>P-MRS). The decrease in PCr at steady state was similar in both trials, whereas Pi at the steady state was greater in the W trial than in the C trial. The time constant of PCr decrease was significantly less in the C trial than in the W trial (39±13 vs. 57±3s, p<0.05). These results suggested that warm-up exercise affects the phosphocreatine metabolism in active muscle.