Differences in the Foot Speed during Running between Trained-Runners and Untrained-Runners

Y. Murase, S. Kamei, T. Hoshikawa, M. Miyashita, H. Matsui
1972 Taiikugaku kenkyu (Japan Journal of Physical Education Health and Sport Sciences)  
The purpose of this study was to know the individual differences in the motion pattern of the joints of the lower 玉 imb during nlnning at various speeds . Three subjects ( who were an excellent sprinter , a post ・ trained runner and an untraind ordinary adult ) were e 笛 ployed in this study . ( Table .1 ) Running was performed in the darken room on the ロ10tor ・ driven trea − dmil1 , speeds of which were from 200m/ 1nin to 500 m / min . The light − trace photographs of three points of lower limb
more » ... oints of lower limb were collected by means of an ordinary camera and a black and white 35mm film The light − trace was interrupted every l/ 45 second . Three small lamps were fb 匸 ed on the hip , knee and ankle loints of the left leg . The typical phou)graphs were shown in Fig.1and 2. From those photoglaphs , the vertical dispLacement of knee and ankle 掴 nt8 , the duratim time of o鵬 cycle , the step frequency, the step iength , and the foσt speed were calculated respecti ▼ e 塵 y at each sp d of running . The results were as follows ; LGeneral tende 麗 y . Towa τd5 higher 8peed , the step frequency was frequent , the step length was lengthened , the ▼ertic 旦 1 displacemtents df knee and ank 玉 e joints became larger and the motion of the focrt b 呱 e ' a8ter . 2」 Indi ▼ idual diffefen { : es . The 蹲 were several di8t 血 醜 differences between the trained rumer and the untrained adult . Na1コely , the trai 加 き 己 ru 哩 er carried his knee mofe upwards , made his longer step ( ◎onsequently lower 醜 qゆ f 写 eqPteqCy ) and move his foot more rapid 且 y just befbre the oontact on the ground than untzained . 8t . the same speed of 川 n 血 g .
doi:10.5432/jjpehss.kj00003405379 fatcat:aih67cg7k5bx7muksnj62ihlji