摘要
目的:研究运动后糖原的两种组分的恢复规律与机制。方法:36只大鼠分别于运动前和负重2%游泳2h后的1h、6h、24h宰杀,测定相关指标。结果:血糖、骨骼肌葡萄糖转运速率(GTR)和糖原合成酶(GS)活性比在运动后1h最高,到6h,血糖和GTR已基本恢复,但GS活性比仍较高,胰岛素在运动后1h最低;前糖原(PG)、大糖原(MG)和总糖原(TG)在运动后1h最低,PG到6h已恢复,MG在6h和24h显著回升,但到24h仍未恢复,TG到24h已基本恢复;恢复早期的糖原填充速度快于恢复后期;GTR与PG、MG或TG都呈显著负相关,与TG的相关度较高;GS活性比与MG或TG都呈显著负相关,与MG的相关度较高。结论:运动时,PG和MG都参与供能;运动后糖原恢复先快后慢,PG恢复在前,MG恢复在后,TG含量最终取决于MG的恢复程度。肌糖原含量影响其自身GTR和GS活性,GTR受TG影响,GS活性比主要受MG影响。
To investigate the mechanism and rule of pro-glycogen and Marco-glycogen repletion after exercise.36 SD rats were divided into four groups by the time before exercise and 1 hour,6 hour and 24 hour after two-hours swimming load exercise with 2% of the body weight.The values of relative indexes were tested.The result showed that the values of SG,GTR and GS activity were the highest after exercise for one hour.At six hour after exercise,the values of SG and GTR came back to normal level,while the ratio of GS activity was still high.The values of pro-glycogen,Marco-glycogen and total glycogen were the lowest after exercise for one hour,while the value of pro-glycogen came back to normal level after six hours.Marco-glycogen has significantly increased between 6～24 hours after exercise,but still came back to normal level at 24 hours.The value of total glycogen came back to normal level after 24 hours.The rate of glycogen repletion was faster in the early phase than the later phase after exercise.There was negative correlative relation between GTR and pro-glycogen,Marco-glycogen and total glycogen.It concluded that pro-glycogen and Marco-glycogen was the energy source of working muscle during exercise.The glycogen repletion was fast in early phase and slow in later phase.The pro-glycogen repletion was at first,and Marco-glycogen repletion was at later.The content of muscle glycogen influenced the activity of GTR and GS.The TG influenced GTR,while the MG influenced the activity of GS.
出处
《体育科学》
CSSCI
北大核心
2005年第7期25-30,共6页
China Sport Science
基金
国家科技攻关计划奥运科技专项"重点体能项目运动员消除疲劳及综合体能恢复系统的研究和建设"(2002BA904B16)部分内容
关键词
运动
前糖原
大糖原
恢复
机制
动物实验
exercise
pro-glycogen
Marco-glycogen
repletion
mechanism
animal experiment
