有规律的耐力训练可导致自肺至肌肉线粒体的呼吸链的明显适应性变化。已有资料显示,85％～95％VO_2max的高强度耐力训练每周数次,持续6～12周可使骨骼肌组织线粒体容积密度增加38％～43％,线粒体酶活性增加32％～35％。本文研究的目的在于观察中等强度,较长时间的耐力训练是否也象高强度训练一样改善有氧运动能力及可激发 Regular endurance training can result in a significant adaptive change in the respiratory chain from the lung to the muscle mitochondria. According to the available data, 85% -95% VO_2max high-intensity endurance training can be performed several times a week for 6-12 weeks, which can increase the density of skeletal muscle mitochondria by 38% -43% and increase the mitochondrial enzyme activity by 32% -35% . The purpose of this study is to observe whether moderate-intensity, long-term endurance training also improves aerobic exercise as well as stimulability as high-intensity training