The purpose of this study was to investigate the change in drop jump (DJ) performance with a training process that focused on the state of the brain during the pre-set phase, the stretch reflex during the take-off phase, and the joint kinetics of lower extremities during take-off phase. Three male sprinters performed DJ from a drop height of 0.6 m. We measured variables for state of the brain during the pre-set phase, stretch reflex, and kinetics of lower extremities during take-off. The results revealed that the brain showed disinhibition during the pre-set phase, and stretch reflex facilitation, and an increase in force development of the ankle joint were observed during the take-off phase. Therefore, we propose that the mutual enhancement on component of performance in each phase may be effective in improving DJ performance during a training course.
New Investigator Award
Yoshida, Takuya; Takashi, Kazutaka; Okudaira, Masamichi; Kuki, Seita; Zushi, Amane; Kawahara, Fusako; Zushi, Kodayu; and TANIGAWA, SATORU
"A LONGITUDINAL INVESTIGATION ON DROP JUMP PERFORMANCE-FOCUSING ON BRAIN CONDITION DURING PRE-SET, STRETCH REFLEX AND JOINT KINETICS DURING TAKE-OFF,"
ISBS Proceedings Archive: Vol. 36:
1, Article 146.
Available at: https://commons.nmu.edu/isbs/vol36/iss1/146