Influence of fatigue on head angular acceleration in judo high-intensity exercise

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Details: Category: 2020, Volume 16; 30 April 2020; Hits: 87

Yoshihisa Ishikawa¹, Kenji Anata², Hironori Hayashi³, Naoya Uchimura⁴, Shuichi Okada⁵

¹Faculty of Education, Osaka Kyoiku University, Kashiwara, Japan
²Graduate School of Doctoral Programme Human Development and Environment, Kobe University, Kobe , Japan
³Department of Sport, Faculty of Sport Study, Biwako Seikei Sport College, Seikei , Japan
⁴Faculty of Sport and Health Sciences, Osaka Sangyo University, Sangyo , Japan
⁵Graduate School of Human Development and Environment, Kobe University, Kobe , Japan

Author for correspondence: Yoshihisa Ishikawa; Faculty of Education, Osaka Kyoiku University, Kashiwara, Japan; email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

Background and Study Aim: Head injuries have become a serious problem in judo. For people to safely enjoy judo and with peace of mind, it is important to clarify the causes of head injury and undertake safety measures. The cognitive purpose of this study is the effects of high-intensity exercise fatigue on the angular acceleration of the head in judo.

Material and Methods: We included 15 male members of a university judo club. For high-intensity exercise, seoi-nage was performed once every 2.5 seconds. An angular velocity sensor was used to calculate the angular acceleration of the subjects’ heads (200 Hz).

Results: The maximum angular acceleration of the head immediately increased after high-intensity exercise (p<0.01). The forward flexion muscle strength of the neck increased (p<0.05) and the strength of posterior flexion did not change.

Conclusions: Although the neck muscle strength was not reduced by high-intensity exercise, the maximum angular acceleration of the head increased, it may be related to the slow response of the neck muscle strength that is associated with head injury. Future safety measures should take into account that it is not enough to strengthen the neck muscle alone. Taking appropriate rest during exercise and not performing throwing exercises after high-intensity exercise will reduce the risk of head injury.

Key words: Accident Prevention, Heart Rate, osoto-gari, Muscle strength

AMA:
Ishikawa Y, Anata K, Hayashi H et al. Influence of fatigue on head angular acceleration in judo high-intensity exercise. ARCH BUDO. 2020;16:99-106
APA:
Ishikawa, Y., Anata, K.., Hayashi, H.., Uchimura, N.., & Okada, S.. (2020). Influence of fatigue on head angular acceleration in judo high-intensity exercise. ARCH BUDO, 16, 99-106
Chicago:
Ishikawa, Yoshihisa, Anata Kenji , Hayashi Hironori , Uchimura Naoya , Okada Shuichi . 2020. "Influence of fatigue on head angular acceleration in judo high-intensity exercise". ARCH BUDO 16: 99-106
Harvard:
Ishikawa, Y., Anata, K.., Hayashi, H.., Uchimura, N.., and Okada, S.. (2020). Influence of fatigue on head angular acceleration in judo high-intensity exercise. ARCH BUDO, 16, pp.99-106
MLA:
Ishikawa, Yoshihisa et al. "Influence of fatigue on head angular acceleration in judo high-intensity exercise." ARCH BUDO, vol. 16, 2020, pp. 99-106
Vancouver:
Ishikawa Y, Anata K, Hayashi H et al. Influence of fatigue on head angular acceleration in judo high-intensity exercise. ARCH BUDO 2020; 16: 99-106

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