Modeling the energetics of 100-m running by using speed curves of world champions

被引:81
作者
Arsac, LM
Locatelli, E
机构
[1] Univ Bordeaux 2, Fac Sci Sport, F-33607 Pessac, France
[2] Int Amateur Athlet Federat, F-98007 Monaco, Monaco
关键词
energy cost of running; acceleration; air resistance; anaerobic energy; body size;
D O I
10.1152/japplphysiol.00754.2001
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
The present study aims to assess energy demand and supply in 100-m sprint running. A mathematical model was used in which supply has two components, aerobic and anaerobic, and demand has three components, energy required to move forward (C), energy required to overcome air resistance (Caero), and energy required to change kinetic energy (Ckin). Supply and demand were equated by using assumed efficiency of converting metabolic to external work. The mathematical model uses instantaneous velocities registered by the 1997 International Association of Athletics Federations world champions at 100 in in men and women. Supply and demand components obtained in the male champion were (in J/kg) aerobic 30 (5%), anaerobic 607 (95%), C 400 (63%), Caero 83 (13%), Ckin 154 (24%). Comparatively, a model that uses the average velocity of the male and female 100-m champions overestimates Ckin by 37 and 44%, respectively, and underestimates Caero by 14%. We argued that such a model is not appropriate because Ckin and Caero are nonlinear functions of velocity. Neither height nor body mass seems to have any advantage in the energetics of sprint running.
引用
收藏
页码:1781 / 1788
页数:8
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