文章基本信息

标题：Variation in Resistive Force Selection During Brief High Intensity Cycle Ergometry: Implications for Power Assessment and Production in Elite Karate Practitioners
本地全文：下载
作者：Julien Steven Baker ; Julien Steven Baker ; Bruce Davies 等
期刊名称：Journal of Sports Science and Medicine
印刷版ISSN：1303-2968
出版年度：2006
卷号：5
期号：1
页码：42-46
语种：English
出版社：University of Uludag
摘要：The purpose of this study was to measure power values generated in elite karate fighters during brief high intensity cycle ergometry when resistive forces were derived from total - body mass (TBM) or fat - free mass (FFM). Male international karate practitioners volunteered as participants (n = 11). Body density was calculated using hydrostatic weighing procedures with fat mass ascertained from body density values. Participants were required to pedal maximally on a cycle ergometer (Monark 864) against randomly assigned loads ranging from 70 g·kg-1 - 95 g·kg-1 (using a TBM or FFM protocol) for 8 seconds. The resistive force that produced the highest peak power output (PPO) for each protocol was considered optimal. Differences (p < 0.05) in peak power outputs were found between the TBM and FFM experimental condition (1164 ± 137 W vs. 1289 ± 145 W respectively). Differences were also recorded (p < 0.01) between pedal velocity and applied resistive forces (127 ± 8 rpm vs. 142 ± 7 rpm; 6.6 ± 1 kg vs. 5.5 ± 1 kg, respectively). No differences (p > 0.05) were observed between time to PPO, or heart rate when the TBM and FFM protocols were compared. The findings of this study suggest that when high intensity cycle ergometer resistive forces are derived from FFM, greater peak powers can be obtained consistently in karate athletes. Resistive forces that relate to the active muscle tissue utilised during this type of exercise may need to be explored in preference to protocols that include both lean and fat masses. The findings have implications for both exercise prescription and the evaluation of experimental results concerning karate athletes.
关键词：Anaerobic performance;body composition