著者
松浦 亮太 有光 琢磨 柚木 孝敬 矢野 徳郎
雑誌
九州共立大学スポーツ学部研究紀要 = Bulletin of Kyushu Kyoritsu University. Faculty of sports science (ISSN:1881848X)
巻号頁・発行日
no.4, pp.7-14, 2010-03-31

The purpose of the present study was to investigate performance during repeated cycling sprints (RCS) by surface electromyogram (SEMG) activity and sense of fatigue. Seven healthy subjects (mean ± SD,22.7 ± 3.5 years, 170.4 ± 5.7 cm, 65.4 ± 5.5 kg) performed RCS (ten I 0-sec cycling sprints)interspersedwith both 30 sec and 360 sec recovery periods. Recovery periods of 360 sec were set before the 5th and 9th sprints. Peak power output divided by body mass (PPO・BM1. ) was correlated with SEMG indices in only 2 out of 7 subjects and ratings of perceived exertion (RPE) immediately before each cycling sprint in 6 out of 7 subjects. RPE immediately before each cycling sprint was correlated with blood lactate concentration (r = 0.72: P < 0.01) and oxygen uptake (r = 0.61: P < 0.01), minute ventilation (r = 0.71: P< 0.01), and heart rate (r = 0.57: P < 0.01) immediately before each cycling sprint. These results indicate that performance during RCS was determined by not only efferent motor command from the central nervous system (CNS) to peripheral muscles but also metabolic stress in peripheral muscles. It is thought that the CNS set performance based on afferent information from peripheral muscles and organs in the subsequent exercise during RCS.