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振动训练对大鼠骨骼肌质量和肌细胞机械生长因子mRNA表达的影响 被引量:12

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摘要 目的:探讨不同振动训练模式对大鼠骨骼肌细胞机械生长因子(MGF)mRNA表达和肌肉质量的影响。方法:42只雄性SD大鼠,根据对其施加的不同振动频率(35Hz、25Hz和15Hz)和持续时间(15min和5min),分为7组:安静对照组、低频率短时间振动组、低频率长时间振动组、中频率短时间振动组、中频率长时间振动组、高频率短时间振动组和高频率长时间振动组。各组进行相应振频和时间的振动训练,实验持续8周。实验结束后取材,检测腓肠肌质量相关指标、CK活性和肌细胞MGF mRNA表达水平。结果:各组大鼠腓肠肌质量无显著性差异,中频长时间组和高频短时间组腓肠肌指数(肌肉/体重比值)均显著高于安静对照组(P<0.05)。中频长时间组肌纤维横截面积(CSA)和CK水平均显著高于安静对照组(P<0.05)。各训练组大鼠骨骼肌MGF mRNA表达均显著高于安静对照组,中频长时间组显著高于除高频短时间组之外的其它训练组(P<0.05)。结果提示,适宜的振动(中频率长时间)训练有助于增加腓肠肌相对质量、肌纤维横截面积和肌细胞内CK活性,增强肌细胞MGFmRNA表达。
出处 《中国运动医学杂志》 CAS CSCD 北大核心 2008年第4期508-510,共3页 Chinese Journal of Sports Medicine
基金 国家自然科学基金(编号:10572097) 上海市自然科学基金(编号:05ZR14111) 上海市第二期重点学科建设项目(编号:T0901)资助
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参考文献14

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