'Nordic' Hamstrings Exercise - Engagement Characteristics and Training Responses

Iga, J and Fruer, C S and Deighan, Martine A and De Ste Croix, Mark B and James, David V (2012) 'Nordic' Hamstrings Exercise - Engagement Characteristics and Training Responses. International Journal of Sports Medicine, 33 (12). pp. 1000-1004.

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Abstract

The present study examined the neuromuscular activation characteristics of the hamstrings during the 'Nordic' hamstrings exercise (NHE) and changes in the eccentric strength of the knee flexors with NHE training. Initially, the normalised root mean square electromyographic (EMG) activity of the hamstrings of both limbs during various phases (90-61 degrees, 60-31 degrees and 30-0 degrees of knee extension) of the NHE were determined in 18 soccer players. Subsequently participants were randomly allocated to either a training (n = 10) or control group. The isokinetic eccentric peak torques of the dominant and non-dominant limbs were recorded at 60, 120 and 240 degrees/s pre- and post-training. The EMG values of both limbs were comparable (P = 0.184) and greater EMG activity was recorded at more extended knee positions of the NHE (P = 0.001). 4 weeks of NHE training significantly improved peak torque by up to 21% in all assessment conditions. Data indicate the hamstrings of both limbs are engaged identically during the NHE and training results in gains in the eccentric peak torque of the hamstrings of both limbs; these gains may augment the force that the hamstrings can withstand when forcefully stretched, attenuating injury risk.

Item Type: Article
Article Type: Article
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Schools and Research Institutes > School of Sport & Exercise > Sport and Exercise
Research Priority Areas: Sport, Exercise, Health & Wellbeing
Depositing User: David James
Date Deposited: 21 Apr 2014 20:32
Last Modified: 02 Sep 2016 16:57
URI: http://eprints.glos.ac.uk/id/eprint/400

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