骨骼肌Ⅰ、Ⅱ型纤维组成与乳酸阈的关系  

THE RELATIONSHIP BETWEEN MUSCLE FIBER COMPOSITION AND LACTATE THRESHOLD IN UNTRAINED AND WELL-TRAINED MEN

作　　者：周倩[1] 陶心铭[1] 

机构地区：[1]上海体育学院运动生理教研室

出　　处：《中国运动医学杂志》1989年第1期6-8,共3页Chinese Journal of Sports Medicine

摘　　要：对6名男子自行车运动员和8名普通青年男子的股外肌进行活检取样测定Ⅰ、Ⅱ型纤维的百分比,同时利用渐增负荷运动试验测定最大吸氧量、乳酸阈。结果表明,虽然运动员的最大吸氧量、乳酸阈显著高于普通人,但两组受试者的Ⅰ型纤维%、Ⅰ型纤维面积%均与乳酸阈有显著的相关关系。这提示不但普通人的乳酸阈受Ⅰ型纤维%的影响,而且运动员通过训练后乳酸阈的提高也受Ⅰ型纤维%的制约。本文建议,在要求较高乳酸阈的运动项目的选材时,应考虑Ⅰ型纤维%。The investigation was conducted among eight untrained male and six well-trained male cyclists with the purpose of finding out the relationship between muscle fiber composition and lactate threshold. Muscle biopsy samples were taken of vastus lateralis to determine the composition of fiber type (Ⅰ, Ⅱ). Maximal oxygen uptake was measured in a progressive cycle ergometer test, while blood lactate threshold was determined on the basis of a systematic increase in BLa above baseline warm-up values. Analyses show that the percentage of type Ⅰ is closely correlated with lactate threshold in both groups of subjects and that muscle fiber composition plays (?) important role in determining lactate threshold. Therefore, an assessment of muscle fiber composition is useful for spotting athletes with high potential for endurance performance.

关 键 词：骨骼肌 乳酸阈 肌纤维 训练 

分 类 号：G804.22[文化科学—运动人体科学]