体育学刊

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减量训练对大鼠骨骼肌最大等长收缩力的影响
金雯1，王煜2

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（1.江苏大学医学院，江苏镇江 212001； 2.西安体育学院，陕西西安 710068）
摘要：为探讨减量训练对骨骼肌最大等长收缩力的影响。将成年S.D雄性大鼠随机分为2组，正常对照组（NC，16只）和快速力量训练组（PT，Power training，36只）。快速力量训练6周后，PT组又分为训练对照组（PTC，12只）、减量训练1组（PTT1，12只）和减量训练2组（PTT2，12只）。PTC组继续进行原训练，PTT1组和PTT2组进行6周减量训练。最后测定大鼠右侧后腿腓肠肌最大等长收缩力相对值（F/m），观察减量训练对其的影响。结果表明，80%强度的减量训练后最大等长收缩力相对值呈先下降后回升直至超量恢复的趋势；50%强度的减量训练后相对值呈持续下降趋势，没有再回升。适当的减量训练可以巩固和加强训练效果；减量过多则会导致训练效果丧失，出现减量后的不良影响。
关键词：快速力量；减量训练；大鼠；骨骼肌；最大等长收缩力
中图分类号：G804.7 文献标识码：A文章编号：1006-7116(2006)02-0066-03

An experimental study of the effect of intensity reduced training on the maximum isometric contraction strength of skeletal muscle of rats
JIN Wen1，WANG Yu2

（1.School of Medicine，Jiangsu University，Zhenjiang 212001，China；2.Xi’an Institute of Physical Education，Xi’an 710068，China）
Abstract: To probe into the effect of intensity reduced training on the maximum isometric contraction strength of skeletal muscle, the authors randomly divided S.D. adult male rats into 2 groups,namely,normal control group (NC,16 rats) and fast power training group (PT,36 rats). After 6 weeks of fast power training,the PT group was divided into training control group (PTC,12 rats), intensity reduced training group 1 (PTT1,12 rats),and intensity reduced training group 2 (PTT2,12 rats). The original training continued to be conducted on the PTC group,while 6 weeks of intensity reduced training was conducted on the PTT1 and PTT2 groups. At the end of this experiment,the relative value (F/m) of the maximum isometric contraction strength of right sural muscle of rear legs of the rats was measured, and the effect of intensity reduced training on such contraction strength was observed. The authors revealed the following findings: After 80% intensity reduced training,the relative value of the maximum isometric contraction strength presented a trend of descending to re-ascending to super compensation;after 50% intensity reduced training,the relative value presented a continuous descending trend without re-ascending;appropriate intensity reduced training could consolidate and reinforce the training effect; intensity overly reduced training would render the training ineffective and result in an adverse effect after the intensity was overly reduced.
Key words: fast power; intensity reduced training; rat; skeletal muscle; maximum isometric contraction strength

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