跑台训练和力竭运动对Ca2+-ATP酶活性的影响——以大鼠骨骼肌不同肌纤维线粒体为例

30只雄性Wistar大鼠按体重随机分为安静组、力竭运动组、训练加力竭运动组.前组在安静时，后两组跑台力竭运动后，即刻取股四头肌测定红、白肌肌纤维线粒体Ca²⁺-ATP酶活性.结果表明：(1)安静时白肌肌纤维线粒体Ca²⁺-ATP酶活性较红肌的高；(2)力竭运动使白肌肌纤维线粒体Ca²⁺-ATP酶活性降低，红肌的则升高；(3)5周的递增负荷训练对白肌肌纤维线粒体Ca²⁺-ATP酶活性的影响较大，而对红肌的几乎没什么影响.此结果提示了递增负荷训练中可能慢运动单位较少参与运动，所以该训练方式可能只对白肌起到积极的锻炼作用.

Influence of Treadmill Training and Acute Exhaustive Exercise on Ca2 +- ATPase Activity in Mitochondria of Different Types of Muscle in Rats

Thirty Wistar male rats were randomly divided into 3 groups : quiet group (A) ; exhaustive exercise group (B) ; training and exhaustive exercise group (C). Ca 2+ -ATP ase activity in mitochondria of different types of muscle were determined . The results showed : 1) Ca 2+ -ATP ase activity in mitochondria of the white muscle was higher than that of the red muscle at rest ; 2) After exhaustive exercise,Ca 2+ -ATP ase activity in mitochondria of the white muscle decreased but that of the red muscle incrased; 3) The change of Ca 2+ -ATP ase activity in mitochondria of the white muscle was larger through five weeks training . The above data suggest that the progressively increase load training takes positive effect only for the white muscle .