Plantar flexion fatigue and muscle fiber type in power and endurance athletes
作者:
PRISCILLA CLARKSON,
WALTER KROLL,
THOMAS McBRIDE,
期刊:
Medicine and Science in Sports and Exercise
(OVID Available online 1980)
卷期:
Volume 12,
issue 4
页码: 262-267
ISSN:0195-9131
年代: 1980
出版商: OVID
数据来源: OVID
摘要:
CLARKSON, PRISCILLA M., WALTER KROLL, and THOMAS C. McBRIDE. Plantar flexion fatigue and muscle fiber type in power and endurance athletes.Med. Sci. Sports Exercise, Vol. 12, No. 4, pp. 262–267, 1980. The relationship between isometric plantar flexion strength fatigue patterns and muscle fiber type composition of the gastrocnemius was assessed in endurance (N = 8) and power (N = 8) trained males. Following baseline strength assessment, subjects were administered two different 25 trial isometric exercise regimens: on one exercise day each 10-sec fatigue trial was separated by a five-sec intertrial rest period, while on the second exercise day the 10-sec fatigue trials were separated by 20-sec intertrial rest periods. Muscle biopsies were secured from the right medial gastrocnemius. Significantly different fatigue patterns resulted between power and endurance groups, with the power group fatiguing five times faster than the endurance group in the 10:5 condition and demonstrating more complex fatigue curves in both exercise conditions. Slow twitch fiber percent number correlated with rate of fatigability as measured by linear trend coefficients in power (r = .84) and endurance groups (r = .26). Rate of fatigability correlated with maximum isometric strength in both power (r = -.66) and endurance (r = -.86) groups. Thus, maximum isometric strength was a better predictor of rate of fatigability than muscle fiber type composition.
点击下载:
PDF
(541KB)
返 回