The Copenhagen Adductor Exercise Trial

December 20, 2018 updated by: Mr Jack Dawkins, University of Bath

Hip Adductor Muscle Strength Changes With the Copenhagen Adductor Exercise in Male Football (Soccer) Players.

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.

Study Overview

Status

Completed

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

39

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • Avon
      • Bath, Avon, United Kingdom, BA2 7AY
        • Physio & Sports Science Centre, University of Bath

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

16 years to 24 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

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 Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 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.
The active player is supported on one forearm on the floor and the upper arm is resting along their side. The supporting partner places their hands at the ankle and the knee of the upper leg. The active partner raises their body from the floor and adducts both legs in a three second movement until the body reaches a straight line. The body is then lowered to the ground in a three second movement, the foot of the lower leg touches the ground before performing another repetition.
Other Names:
  • Adductor bridge exercise
No Intervention: Control
19 players allocated to the control group will be asked not to perform the Copenhagen adductor exercise or any other specific strength training for the adductor muscles and to continue to play football as usual.

What is the study measuring?

Primary Outcome Measures

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

Secondary Outcome Measures

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

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

October 1, 2018

Primary Completion (Actual)

December 4, 2018

Study Completion (Actual)

December 10, 2018

Study Registration Dates

First Submitted

September 21, 2018

First Submitted That Met QC Criteria

September 24, 2018

First Posted (Actual)

September 25, 2018

Study Record Updates

Last Update Posted (Actual)

December 21, 2018

Last Update Submitted That Met QC Criteria

December 20, 2018

Last Verified

December 1, 2018

More Information

Terms related to this study

Other Study ID Numbers

  • UBath (Registry Identifier: Chatwalai)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

Undecided

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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