The Copenhagen Adductor Exercise Trial

Not Applicable

Completed

• Conditions: Eccentric Hip Adduction Strength
• Interventions: Other: Copenhagen adductor exercise

• Registration Number: NCT03684200
• Lead Sponsor: University of Bath

Brief Summary

The purpose of this study is to investigate the efficacy of a 6-week intervention, using the Copenhagen adductor exercise, on adductor muscle strength in sub-elite male footballers. Secondly, it will also examine the effect of a 3-week detraining period, after stopping the Copenhagen adductor exercise, on adductor muscle strength.

The primary outcome measure is eccentric hip adduction strength measured using a handheld dynamometer. Additionally, peak isometric adductor squeeze strength will also be measured using a handheld dynamometer.

The hypothesis is that strength training of the adductor muscles elicited by the Copenhagen adductor exercise will result in enhanced eccentric hip adduction strength.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2018-09-21
• Study First Submitted QC: 2018-09-24
• Study First Posted: 2018-09-25
• Study Start: 2018-10-01
• Status Verified: 2018-12
• Primary Completion: 2018-12-04
• Study Completion: 2018-12-10
• Last Update Submitted: 2018-12-20
• Last Update Posted: 2018-12-21

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 39

Inclusion Criteria

• Sub-elite English football player
• Age 18-26
• Participant can read, speak and understand English.
• Participant can receive and reply to texts on a cell phone using Short Message Services (SMS).
• Able to participate fully in competitive football training at time of testing.

Exclusion Criteria

• Hip and groin pain resulting in loss of football training and matches in the 2 months prior to commencement of the trial.
• Specific strength training of the adductor muscles (>/1 week) in the 2 months prior to commencement of the trial.
• Participant cannot attend strength testing sessions during the study.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Copenhagen adductor exercise	Copenhagen adductor exercise	20 players allocated to the Copenhagen adductor exercise group complete a progressive strengthening programme comprising of the Copenhagen adductor exercise over a period of 6 weeks. They will complete two exercise sessions a week consisting of one set of the Copenhagen adductor exercise. The exercise will be performed on each side. The training load will increase from 5 repetitions in week 1, to 15 repetitions in week 6. The exercise programme is performed at the end of the warm-up of a regular football training session.

Primary Outcome Measures

Name	Time	Method
Eccentric hip adduction strength measured using a handheld dynamometer	Measured after intervention period (at week 6)	Lafayette handheld dynamometer (model: 01165) will be used to produce force values in Newtons.

Secondary Outcome Measures

Name	Time	Method
Rate of perceived exertion (RPE) at each session training session.	Measured during intervention period (at week 1, 2, 3, 4, 5 and 6)	Measured using the 6-20 Borg Rating of Perceived Exertion Scale.
Eccentric hip adduction strength measured using a handheld dynamometer	Measured prior to and after intervention period (at week 0, 7, 8 and 9)	Lafayette handheld dynamometer (model: 01165) will be used to produce force values in Newtons.
Peak isometric adductor squeeze strength measured using a handheld dynamometer	Measured prior to and after intervention period (at week 0, 7, 8 and 9)	Lafayette handheld dynamometer (model: 01165) will be used to produce force values in Newtons.
Maximal weekly delayed onset of muscle soreness (DOMS)	Measured during intervention period (at week 1, 2, 3, 4, 5 and 6)	Measured using a 0-10 numeric rating scale (NRS).

Trial Locations

Locations (1)

Physio & Sports Science Centre, University of Bath; 🇬🇧 Bath, Avon, United Kingdom