The purpose of this study was to examine the effect of resistance exercise on muscle oxygen consumption (VO₂mus) in nonexercising muscles after exercise. Seven healthy male subjects performed the six sets of unilateral knee extension exhausting exercise at 40%, 60%, and 80% of 1 repetition maximum (RM) with 3 min rest period between sets on separate days. The VO₂mus in nonexercising forearm flexor muscles (nonexVO₂mus) at rest, at the end of exercise, and during recovery after exercise were measured by near infrared spectroscopy. VO₂mus was determined using the rate of decrease in oxygenated hemoglobin during arterial occlusion. The nonexVO₂mus at the end of exercise significantly (p<0.05) increased 1.8±0.2, 1.7±0.2, 1.4±0.3 fold of resting values at 40%, 60%, and 80%RM, respectively. The nonexVO₂mus decreased to the resting values after 3-10 min of recovery and did not change significantly until 120 min during recovery period at all exercise intensities. There were no significantly differences in nonexVO₂mus after exercise among all exercise intensities. This study suggested that knee extension resistance exercise induced increase in nonexVO₂mus after exercise and the increase of nonexVO₂mus after exercise is recovered to resting value in several minutes.

DESCENTE SPORTS SCIENCE Vol.27/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE