A kinetic and kinematic comparison of the grab start and track start in swimming

Swimming - Starts and turns

Allen, DavidMiller, M. ;

University of Wisconsin

关键词: Swimming - Starts and turns;   

Others  :  https://minds.wisconsin.edu/bitstream/handle/1793/48624/Oallendavid1997.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: University of Wisconsin

【 摘 要 】

Fifteen collegiate swimmers (8 females, mean age = 18.38,7 males, mean age = 19.43)volunteered as subjects to determine differences between 5 kinematic variables and 2kinetic variables using the grab start and track start. Subjects attended a 1 hour practicesession, completing a minimum of 15 starts of each technique. Subjects were videotapedperforming 14 trials of each start technique. Force data were collected from the last 5trials of each technique. A MANOVA revealed the grab start had a significantly (p < .05)longer flight distance for all subjects. Subjects who preferred the grab start achieved13.1% increase (normalized to body height) in flight distance with the grab start, whilesubjects preferring the track start had a 9.6% increased flight distance kith the grab start.A significant difference (p < .05) was also found between the preferred starting techniqueand the absorption force (AFz) in the vertical direction. This force was attributed to theback leg pushing against the block during this time period. Male subjects who preferredthe track start had a significantly (p < .05) faster start time for the track start than maleswho preferred the grab start. No other significant differences were found between anyother variables. Further investigations on different populations would allow the results tobe more generalized. More practice sessions should also be completed to decrease theeffect of learning on the performance of the start techniques.