トレッドミル走における持続時間と生理学的応答の変動 Variability of time to exhaustion and physiological responses to treadmill running
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The purpose of this study was to assess whether intraindividual variability in run time to exhaustion is related to Vo_2max, HRmax, vVT (running velocity at VT), vVo_2max (running velocity at Vo_2max), and running economy (Vo_2 at 268 m・min^-1 running velocity). The subjects were nine trained university runners. An 8-13 repeated incremental treadmill test (test 1) and another maximal treadmill running test at v Vo_2max to measure the tLIM (run time to exhaustion) at Vo_2max (test 2) were given to each subject at the same time and the same day of the week over 8-13 weeks. These treadmill running tests (tests 1 and 2) were performed at constant temperature (20±0.5℃) and humidity (50±2%) conditions and the same analyzers were used for measuring the Vo_2 (test 1). The mean coefficient of variation (CV) of each subject in run time to exhausion, Vo_2max (ml・kg^1・min^1), HRmax, vVT, vVo_2max, running economy and tLIM at Vo_2max were within the ranges 3.1-6.1%, 4.0-7.6%, 1.0-3.3%, 2.2-5.6%, 1.5-3.5%, 3.6-7.1%, 9.5-32.7%, respectively. It was difficult to explain an intraindividual variability in run time to exhaustion by the variation in Vo_2max, vVT and running economy, except in one subject. Therefore, it is speculated that intraindividual variability in run time to exhaustion in the 8 subjects might have been due to daily changes in peripheral fatigue of the legs, psychological factors (duration of tension and motivation), and anaerobic capacity.
- Taiikugaku kenkyu (Japan Journal of Physical Education, Health and Sport Sciences)
Taiikugaku kenkyu (Japan Journal of Physical Education, Health and Sport Sciences) 45(1), 15-23, 2000
Japan Society of Physical Education, Health and Sport Sciences