Nagasawa T
Integrated Arts and Science, Okinawa National College of Technology, Okinawa, Japan.
Int J Sports Med. 2008 Aug;29(8):624-9. doi: 10.1055/s-2007-989262. Epub 2007 Nov 14.
Little is known about the effect of exercise intensity on post-exercise oxygen consumption in nonexercising muscle. This study examined the effect of exercise intensity on muscle oxygen consumption (VO2mus) in nonexercising forearm flexor muscles (nonexVO2mus) after cycling exercise. Eight healthy male subjects performed 20 min of cycling exercise at 30%, 50%, and 70% of maximal oxygen consumption (%VO2max) on separate days. The nonexVO2mus values 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 increased by 1.3 +/- 0.1, 2.0 +/- 0.3, and 2.2 +/- 0.3-fold over resting values at 30%, 50%, and 70% VO2max, respectively. NonexVO2mus returned to the resting value after 3 - 5 min of recovery and then showed no significant change for 120 min after exercise at all exercise intensities. NonexVO2mus at the end of exercise at 70% VO2max was significantly higher than that after exercise at 30% VO2max. These results show that 20 min of cycling exercise induced an increase in nonexVO2mus and that higher intensity exercise produces a larger increase in nonexVO2mus after exercise.
关于运动强度对非运动肌肉运动后耗氧量的影响，目前所知甚少。本研究考察了骑行运动后，运动强度对非运动的前臂屈肌（非运动肌肉耗氧量）肌肉耗氧量（VO2mus）的影响。八名健康男性受试者在不同日期分别以最大耗氧量（%VO2max）的30%、50%和70%进行了20分钟的骑行运动。通过近红外光谱法测量休息时、运动结束时以及运动后恢复期间的非运动肌肉耗氧量值。VO2mus通过动脉闭塞期间氧合血红蛋白的下降速率来确定。在30%、50%和70%VO2max时，运动结束时的非运动肌肉耗氧量分别比静息值显著增加了1.3±0.1、2.0±0.3和2.2±0.3倍。恢复3 - 5分钟后，非运动肌肉耗氧量恢复到静息值，然后在所有运动强度下运动后120分钟内均无显著变化。在70%VO2max运动结束时的非运动肌肉耗氧量显著高于在30%VO2max运动后的非运动肌肉耗氧量。这些结果表明，20分钟的骑行运动可导致非运动肌肉耗氧量增加，且更高强度的运动在运动后会使非运动肌肉耗氧量有更大的增加。
