A4 Article in conference proceedings
Energy Cost and Lower Limb Biomechanics of Repeated Vertical Jumping at Different Contact Times (2020)


Seki, Keitaro; Kyröläinen, Heikki; Enomoto, Yasushi (2020). Energy Cost and Lower Limb Biomechanics of Repeated Vertical Jumping at Different Contact Times. In Robinson, Mark A. (Eds.) ISBS 2020 : 38th Conference of the International Society of Biomechanics in Sports, ISBS Proceedings Archive. International Society of Biomechanics in Sports 38 (1), 45. https://commons.nmu.edu/isbs/vol38/iss1/45


JYU authors or editors


Publication details

All authors or editors: Seki, Keitaro; Kyröläinen, Heikki; Enomoto, Yasushi

Parent publication: ISBS 2020 : 38th Conference of the International Society of Biomechanics in Sports

Parent publication editors: Robinson, Mark A.

Place and date of conference: Online, 21.-25.7.2020

Journal or series: ISBS Proceedings Archive

eISSN: 1999-4168

Publication year: 2020

Volume: 38

Issue number: 1

Article number: 45

Publisher: International Society of Biomechanics in Sports

Publication language: English

Persistent website address: https://commons.nmu.edu/isbs/vol38/iss1/45

Open Access: Publication published in an open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/71424


Abstract

The purpose of the present study was to examine the effects of the contact time on energy cost and lower limb biomechanics during repeated vertical jumping. Nine male Japanese distance runners jumped for three minutes on a force platform for a preferred and long contact time. Sagittal plane kinematics, ground reaction force, and electromyography (EMG) results were measured. The following results were obtained: 1) the energy cost was significantly smaller in the preferred than in long condition, 2) mechanical work of the ankle joint was significantly greater in the preferred than in long condition, 3) mechanical work of the knee joint was significantly greater in the long than in preferred condition. Therefore, a longer contact time alters the distribution of the mechanical work of the ankle and knee joints. This alteration may increase energy cost in the long condition.



Contributing organizations


Ministry reporting: Yes


Last updated on 2020-17-08 at 17:25