Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2022) 21, 43 - 48   DOI: https://doi.org/10.52082/jssm.2022.43

Research article
The Effect of Ankle Position on Peak Eccentric Force during The Nordic Hamstring Exercise
Satoru Nishida1, , Wataru Ito2,3, Taisuke Ohishi4, Riku Yoshida2, Shigeru Sato2, Masatoshi Nakamura2,3
Author Information
1 Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan
2 Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
3 Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan
4 Niigata Rehabilitation Hospital, Japan

Satoru Nishida
✉ PhD, JSPO-AT Faculty of Sports and Health Science, Fukuoka University 8-19-1, Nanakuma, Jonan-ku, Fukuoka, Fukuoka 814-0180, Japan
Email: atoru.nishida5521@gmail.com
Publish Date
Received: 15-09-2021
Accepted: 27-10-2021
Published (online): 15-02-2021
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ABSTRACT

Peak eccentric force during the Nordic hamstring exercise (NHE) is recognized as a predictive factor for hamstring strain injury (HSI). During the NHE, the knee flexor muscles are eccentrically contracting to resist the knee joint extension. Therefore, it is thought that the action of the gastrocnemius muscle, and thus the ankle position, influences peak eccentric force during the NHE. However, the effect of ankle position on peak eccentric force during the NHE remains unclear. Therefore, we investigated the effect of ankle position on peak eccentric force during the NHE in a cohort of 50 healthy young male rugby players (mean age, 18.7 ± 1.2 years; mean body mass, 81.7 ± 15.2 kg; height, 1.72 ± 0.06 m) with no history of HSI. Each participant performed NHE strength testing with the ankle dorsiflexed or plantarflexed position and was instructed to fall forward as far as possible within 3 s. Peak eccentric force, reported relative to body mass (N/kg), of both legs was recorded, and the mean values of both legs were compared in both ankle positions. The mean peak eccentric force was significantly greater with the ankle plantarflexed position than the dorsiflexed position (3.8 ± 1.1 vs. 3.5 ± 1.1 N/kg, respectively, p = 0.049). These results indicate that ankle position should be carefully considered when measuring peak eccentric force during the NHE and performing NHE training.

Key words: Eccentric exercise, hamstring strain injury, risk screening, injury prevention


           Key Points
  • We examine the relationship between ankle position and peak eccentric force during the Nordic hamstring exercise.
  • Peak eccentric force was significantly greater with the ankle plantarflexed position than the dorsiflexed position
  • Significant positive correlation was observed between peak eccentric force with the ankle in both the plantarflexed and dorsiflexed positions.
  • These results suggest that the position of the ankle should be carefully considered when measuring peak eccentric force during the Nordic hamstring exercise.
 
 
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