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

Bourne, Matthew N., Duhig, Steven, Timmins, Ryan, Williams, Morgan, Opar, David A., Al Najjar, Aiman, Kerr, Graham K., & Shield, Anthony (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.

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Abstract

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

  • Thirty recreationally active male athletes (age, 22.0 ± 3.6 years, height, 180.4 ± 7 cm, weight, 80.8 ± 11.1 kg) were allocated to one of three groups: 1) HE training (n=10), NHE training (n=10), or no training (CON) (n=10). BFLH fascicle length was assessed before, during (Week 5) and after the intervention with 2D-ultrasound. Hamstring muscle size was determined before and after training via magnetic resonance imaging.

RESULTS

  • Compared to baseline, BFLH fascicles were lengthened in the NHE and HE groups at mid- (d = 1.12 – 1.39, p < 0.001) and post-training (d = 1.77 – 2.17, p < 0.001) but remained unchanged for the CON group (d = 0.20 – 0.31, p > 0.05). 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 to the CON group, both exercises induced significant increases in semitendinosus volume (d = 2.16 – 2.50, ≤ 0.002), however, only the HE group displayed increased semimembranosus volume (d= 1.57, p = 0.007).

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 and semimembranosus than the NHE.

Impact and interest:

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3 citations in Web of Science®
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ID Code: 98433
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Hamstring strain injury
DOI: 10.1136/bjsports-2016-096130
ISSN: 1473-0480
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > HUMAN MOVEMENT AND SPORTS SCIENCE (110600) > Sports Medicine (110604)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2016 B M J Group
Deposited On: 29 Aug 2016 00:43
Last Modified: 28 Jun 2017 10:01

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