急性运动对骨骼肌肌浆网钙转运功能的影响  

Bffect of Acute Exercise on Ca2+ . Transport Capacity of Saroplastic Raticulun of Skeletal Museles in Rats

作　　者：田野[1,2] 周锦琳[1,2] 李洁 

机构地区：[1]北京体育大学 [2]西北师范大学

出　　处：《中国运动医学杂志》1997年第3期173-175,共3页Chinese Journal of Sports Medicine

基　　金：国家教委博士学科点基金

摘　　要：肌浆网（ＳＲ）在调节骨骼肌收缩一舒张过程中发挥重要作用。我们在本研究中采用持续运动方式观察急性运动对ＳＲ钙转运能力的影响，发现运动后股四头肌ＳＲＣａ２＋－Ｍｇｚ＋－ＡＴＰａｓｅ水解活性下降１８．３１％（Ｐ＜０．０１），ＳＲＣａ２＋－ＡＴＰａｓｅ水解活性下降１８．４７％（Ｐ＜０．０１）；ＳＲＣａ２＋转运能力明显下降，表现为ＳＲＣａ２＋初始摄取率和ＳＲＣａ２＋最大转运能力分别下降５７．７９％（Ｐ＜０．０１）和５５．９８％（Ｐ＜０．０１）。本研究结果提示急性运动后ＳＲＣａ２＋摄取功能下降可能与运动性骨骼肌疲劳密切相关。Education Sarcoplasmic reticulum ( SR ) plays an important role in regulating the contraction-relaxation of skeletal muscles This paper studied the affect of acute exercise on SR Ca2+. tranport capacity of skeletal muscles of rats during consecu- tive running on rodent treadmill.It was found that the SR ca2+ - Mg2 -ATPase activity and SR Ca2 . - ATPase activi- ty decreased by 18.31%(P<0.01)and 18.47%(P<0.01)respectively in the exercise group compared with the control one. Also, there were obvious reductions in initial rate of SR Ca2+ uptake ( 57.79%, P<0. 01) and maximal capacity of SR Ca2+ uptake (55.98%, P< 0.01) after running. The results suggested that the reduction of SR Ca2+ transport capac- ity might be closely reated to exercise-induced skeletal muscle fatigue .

关 键 词：骨骼肌 肌浆网 钙离子转运 运动 疲劳 

分 类 号：R872.7[医药卫生—运动医学] G804.7[医药卫生—临床医学]