跑台训练和力竭运动对Ca^(2+)-ATP酶活性的影响——以大鼠骨骼肌不同肌纤维线粒体为例

Influence of Treadmill Training and Acute Exhaustive Exercise on Ca^(2+)- ATP_(ase) Activity in Mitochondria of Different Types of Muscle in Rats

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 。

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 .