Biomechanical Comparisons of One-Legged and Two-Legged Running Vertical Jumps

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題名:	Biomechanical Comparisons of One-Legged and Two-Legged Running Vertical Jumps
作者:	Tai, WH (Tai, Wei-Hsun) Wang, LI (Wang, Li-I) Peng, HT (Peng, Hsien-Te)
貢獻者:	物理系
關鍵詞:	COUNTER MOVEMENT JUMP STRENGTH EXERCISES JOINT STIFFNESS TRICEPS SURAE SQUAT JUMP MUSCLE PERFORMANCE PLAYERS COMPLEX OUTPUT
日期:	2018-09
上傳時間:	2019-01-16 15:48:29 (UTC+8)
摘要:	The purpose of this study was to determine the differences in biomechanical characteristics between one-and two-legged running vertical jumps (1-LRVJ and 2-LRVJ). Ten male college volleyball players voluntarily participated in this study. Two running vertical jumps used in volleyball were randomly performed. Three trials for each type of the running vertical jump were recorded for each participant. Data were collected using six infra-red Qualisys motion-capture cameras at a 180-Hz sampling rate and two AMTI force platforms at an 1800-Hz sampling rate. Jump height in the 2-LRVJ was significantly higher than that in the 1-LRVJ (p < 0.05). In the take-off phase, knee and hip extension impulses for the 1-LRVJ were significantly greater than those for the 2-LRVJ (p < 0.05). These results suggest that the 1-LRVJ produced greater leg stiffness than the 2-LRVJ did. We found that the 1-LRVJ caused greater lower-extremity stiffness and impulse compared to the 2-LRVJ, which is beneficial in the stretch-shortening cycle, and thus the more focus on practicing 1-LRVJs is recommended for coaches and athletes.
顯示於類別:	[Department of Physics ] journal articles

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