A Comparison of Hip Extension and Nordic Hamstring Exercise Programmes on Isokinetic Hamstring Strength

Hamstring Injury Clinical Trial

Official title:

A Comparison of Hip Extension and Nordic Hamstring Exercise Programmes on Isokinetic Hamstring Strength

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03697473
• Other study ID #: 2016_007_EW
• Status: Completed
• Phase: N/A
• Start date: January 5, 2017
• Est. completion date: April 30, 2017

Study information

• Verified date: October 2018
• Source: Dublin City University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This study aimed to compare the effect of two hamstring strengthening programmes on hamstring muscle strength in Gaelic footballers. 26 Gaelic footballers were recruited and randomly assigned to one of two 4-week hamstring strengthening programmes, namely the hip extension exercise programme and the Nordic hamstring exercise protocol. Isokinetic hamstring and quadriceps strength were measured before and after the intervention.

Description:

Recruitment:

Participants were recruited from the local university sports clubs. Club chairpersons were asked to send an email to club players. Players interested in participating in the study expressed an interest by replying to the email. Potential participants were asked to attend a meeting where they had the study explained to them. Those who were interested were then assessed for inclusion and exclusion criteria.

Group allocation:

A four block randomisation method was used to allocate participants to the Nordic hamstring exercise protocol or the hip extension exercise protocol.

Interventions:

The Nordic hamstring exercise protocol or the hip extension exercise protocol

Testing procedure:

The isokinetic strength of the participants' hamstrings and quadriceps were recorded before and after the exercise intervention.

A 10 point visual analogue scale was used to record the level of muscle soreness experienced after each training session.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 26
• Est. completion date: April 30, 2017
• Est. primary completion date: April 30, 2017
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 35 Years

Eligibility

Inclusion Criteria:

• male

• free from hamstring injury in the 6 months prior to the study

• currently playing Gaelic football at a varsity level on at least three occasions per week

Exclusion Criteria:

• history of a hip or knee injury in the 3 months prior to the study

• a history of anterior cruciate ligament rupture

• a history of involvement in a hamstring strengthening, injury prevention programme in the 3 months prior to the study.

Related Conditions & MeSH terms

• Hamstring Injury

Intervention

Other:
• Nordic hamstring exercise
The exercise protocol consisted of the following sets and repetitions Week 1 - 2 sessions with 2 sets of 6 repetitions. Week 2 - 2 sessions with 3 sets of 6 repetitions Week 3 - 2 sessions with 4 sets of 8 repetitions. Week 4 - 2 sessions with 4 sets of 10 repetitions.
• Hip extension exercise
The exercise protocol consisted of the following sets and repetitions Week 1 - 2 sessions with 2 sets of 6 repetitions. Week 2 - 2 sessions with 3 sets of 6 repetitions Week 3 - 2 sessions with 4 sets of 8 repetitions. Week 4 - 2 sessions with 4 sets of 10 repetitions.

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Dublin City University

References & Publications (7)

Bijur PE, Silver W, Gallagher EJ. Reliability of the visual analog scale for measurement of acute pain. Acad Emerg Med. 2001 Dec;8(12):1153-7. — View Citation

Bourne MN, Duhig SJ, Timmins RG, Williams MD, Opar DA, Al Najjar A, Kerr GK, Shield AJ. Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: implications for injury prevention. Br J Sports Med. 2017 Mar;51(5):469-477. doi: 10.1136/bjsports-2016-096130. Epub 2016 Sep 22. — View Citation

Bourne MN, Timmins RG, Opar DA, Pizzari T, Ruddy JD, Sims C, Williams MD, Shield AJ. An Evidence-Based Framework for Strengthening Exercises to Prevent Hamstring Injury. Sports Med. 2018 Feb;48(2):251-267. doi: 10.1007/s40279-017-0796-x. Review. — View Citation

Impellizzeri FM, Bizzini M, Rampinini E, Cereda F, Maffiuletti NA. Reliability of isokinetic strength imbalance ratios measured using the Cybex NORM dynamometer. Clin Physiol Funct Imaging. 2008 Mar;28(2):113-9. Epub 2007 Dec 7. — View Citation

Lee JWY, Mok KM, Chan HCK, Yung PSH, Chan KM. Eccentric hamstring strength deficit and poor hamstring-to-quadriceps ratio are risk factors for hamstring strain injury in football: A prospective study of 146 professional players. J Sci Med Sport. 2018 Aug;21(8):789-793. doi: 10.1016/j.jsams.2017.11.017. Epub 2017 Dec 5. — View Citation

Opar DA, Williams MD, Timmins RG, Hickey J, Duhig SJ, Shield AJ. Eccentric hamstring strength and hamstring injury risk in Australian footballers. Med Sci Sports Exerc. 2015 Apr;47(4):857-65. doi: 10.1249/MSS.0000000000000465. — View Citation

van der Horst N, Smits DW, Petersen J, Goedhart EA, Backx FJ. The preventive effect of the nordic hamstring exercise on hamstring injuries in amateur soccer players: a randomized controlled trial. Am J Sports Med. 2015 Jun;43(6):1316-23. doi: 10.1177/0363546515574057. Epub 2015 Mar 20. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Peak isokinetic eccentric hamstring strength at 60°.s-1	This was measured using an isokinetic dynamometer	Change from baseline assessment at six weeks
Secondary	Functional hamstring-to-quadriceps ratio at 60°.s-1	This was calculated by dividing the peak isokinetic, eccentric hamstring strength at 60°.s-1 by the peak isokinetic, concentric quadriceps strength at 60°.s-1	Change from baseline assessment at six weeks
Secondary	Between limb, isokinetic eccentric hamstring strength asymmetries	Between limb eccentric strength percentage asymmetries were calculated as a non-dominant/dominant ratio converted to percentage difference using log transformation.	Change from baseline assessment at six weeks
Secondary	Muscle soreness rating following exercise	Participants used a 10 point visual analogue scale to record the level of muscle soreness experienced after training sessions.; The scale consisted of a single scale of 0 to 10 where 0 was no soreness at all and 10 was the greatest soreness they could imagine. A higher score indicated a worse outcome. There are no subscales included in this.	1 minute at the end of each intervention session