文章基本信息

标题：Differences in Muscle Fiber Recruitment Patterns between Continuous and Interval Exercises
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作者：Seiko YAMANO ; Minako KAWAI ; Yoshio MINAMI 等
期刊名称：Journal of Equine Science
印刷版ISSN：1340-3516
电子版ISSN：1347-7501
出版年度：2010
卷号：21
期号：4
页码：59-65
DOI：10.1294/jes.21.59
出版社：Japanese Society of Equine Science
摘要：We evaluated differences in muscle fiber recruitment patterns between continuous and interval training to develop an optimal training program for Thoroughbred horses. Five well trained female thoroughbred horses (3-4 years old) were used. The horses performed two different exercises on a 10% inclined treadmill: 90%VO₂ max for 4 min (continuous) and 90% VO₂ max for 2 min × 2 times with 10-min interval (interval). Muscle samples were obtained from the middle gluteal muscle before and immediately after the exercises. Four muscle fiber types (type I, IIA, IIA/X, and IIX) were immunohistochemically identified, and the optical density of periodic acid Schiff staining (OD-PAS) in each fiber type and glycogen content of the muscle sample were determined by quantitative histochemical and biochemical procedures, respectively. No significant differences were found in the OD-PASs and glycogen contents between the continuous and interval exercises, but the decreases in OD-PAS of fast-twitch muscle fibers were obvious after interval as compared to continuous exercise. Interval exercise may be a more effective training stimulus for the glycolytic capacity of fast-twitch muscle fiber. The data about muscle fiber recruitment can provide significant insights into the optimal training program not only for thoroughbred horses, but also for human athletes.
关键词：glycogen;interval exercise;muscle fiber;Thoroughbred