Clinical trial NCT03697473: A Comparison of Hip Extension and Nordic Hamstring Exercise Programmes on Isokinetic Hamstring Strength
Official title: A Comparison of Hip Extension and Nordic Hamstring Exercise Programmes on Isokinetic Hamstring Strength
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Hamstring Injury
Keywords: Hamstring strength
Isokinetics
Nordic hamstring exercise
Eccentric strength
Hip extension exercise
Lead sponsor: Dublin City University
Sponsor class: OTHER
First posted: 2018-10-05
Enrollment: 26
Sex: MALE
Minimum age (years): 18
Maximum age (years): 35
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: BASIC_SCIENCE

Brief 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.

Detailed 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.

Eligibility criteria: 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.

Primary outcomes:
measure: Peak isokinetic eccentric hamstring strength at 60°.s-1
timeFrame: Change from baseline assessment at six weeks
Secondary outcomes:
measure: Functional hamstring-to-quadriceps ratio at 60°.s-1
timeFrame: Change from baseline assessment at six weeks
measure: Between limb, isokinetic eccentric hamstring strength asymmetries
timeFrame: Change from baseline assessment at six weeks
measure: Muscle soreness rating following exercise
timeFrame: 1 minute at the end of each intervention session
Other outcomes:
Locations:
Study officials:
affiliation: Dublin City University
name: Enda Whyte, PhD
role: PRINCIPAL_INVESTIGATOR
affiliation: Dublin City University
name: Siobhán O'Connor, PhD
role: PRINCIPAL_INVESTIGATOR
References:
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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.
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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. doi: 10.1111/j.1475-097X.2007.00786.x. Epub 2007 Dec 7.
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.
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.
citation: Whyte EF, Heneghan B, Feely K, Moran KA, O'Connor S. The Effect of Hip Extension and Nordic Hamstring Exercise Protocols on Hamstring Strength: A Randomized Controlled Trial. J Strength Cond Res. 2021 Oct 1;35(10):2682-2689. doi: 10.1519/JSC.0000000000003220.