Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: implications for injury prevention

Article


Bourne, Matthew N., Duhig, Steven J., Timmins, Ryan G., Williams, Morgan D., Opar, David A., Al Najjar, Aiman and Shield, Anthony J.. 2017. "Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: implications for injury prevention." British Journal of Sports Medicine. 51 (5), pp. 469-477. https://doi.org/10.1136/bjsports-2016-096130
Article Title

Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: implications for injury prevention

ERA Journal ID9744
Article CategoryArticle
AuthorsBourne, Matthew N. (Author), Duhig, Steven J. (Author), Timmins, Ryan G. (Author), Williams, Morgan D. (Author), Opar, David A. (Author), Al Najjar, Aiman (Author) and Shield, Anthony J. (Author)
Journal TitleBritish Journal of Sports Medicine
Journal Citation51 (5), pp. 469-477
Number of Pages9
Year2017
PublisherBMJ
Place of PublicationUnited Kingdom
ISSN0306-3674
1473-0480
Digital Object Identifier (DOI)https://doi.org/10.1136/bjsports-2016-096130
Web Address (URL)http://bjsm.bmj.com/content/early/2016/10/05/bjsports-2016-096130
Abstract

Background: The architectural and morphological adaptations of the hamstrings in response to training with different exercises have not been explored.

Purpose: To evaluate changes in biceps femoris long head (BFLH) fascicle length and hamstring muscle size following 10-weeks of Nordic hamstring exercise (NHE) or hip extension (HE) training.

Methods: 30 recreationally active male athletes (age, 22.0±3.6 years; height, 180.4±7 cm; weight, 80.8 ±11.1 kg) were allocated to 1 of 3 groups: (1) HE training (n=10), NHE training (n=10), or no training (control, CON) (n=10). BFLH fascicle length was assessed before, during (Week 5) and after the intervention with a two-dimensional ultrasound. Hamstring muscle size was determined before and after training via MRI.

Results: Compared with baseline, BFLH fascicles were lengthened in the NHE and HE groups at mid-training (d=1.12–1.39, p<0.001) and post-training (d=1.77– 2.17, p<0.001) and these changes did not differ significantly between exercises (d=0.49–0.80, p=0.279– 0.976). BFLH volume increased more for the HE than the NHE (d=1.03, p=0.037) and CON (d=2.24, p<0.001) groups. Compared with the CON group, both exercises induced significant increases in semitendinosus volume (d=2.16–2.50, ≤0.002) and these increases were not significantly different (d=0.69, p=0.239).

Conclusion: NHE and HE training both stimulate significant increases in BFLH fascicle length; however, HE training may be more effective for promoting hypertrophy in the BFLH.

Keywordshamstrings; injury; exercises
ANZSRC Field of Research 2020420799. Sports science and exercise not elsewhere classified
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Byline AffiliationsLa Trobe University
Queensland University of Technology
Australian Catholic University
University of South Wales, United Kingdom
University of Queensland
Institution of OriginUniversity of Southern Queensland
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