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Measuring eccentric hip adductor strength during the Copenhagen adduction exercise : A proof-of-concept and test re-test reliability study
Hickey, Jack T. Lennon, Cian Gillick, Michael Sweeney, Liam
Hickey, Jack T.
Lennon, Cian
Gillick, Michael
Sweeney, Liam
Abstract
Objectives
To describe a novel method for measuring eccentric hip adductor (EHAD) strength during the Copenhagen adduction exercise (CAE) and investigate the test re-test reliability of this measure.
Design
Test re-test reliability study.
Participants
Twenty male athletes aged 24 ± 6 years participated in two data collection sessions 7 ± 2 days apart.
Main outcome measures
During each data collection session, participants performed three maximal effort repetitions of the CAE with their leg supported by an ankle strap hung from a fixed barbell. We attached a commercially available load cell in-series with the ankle strap to measure peak force in Newtons (N) during the eccentric lowering phase of the CAE. The intraclass correlation coefficient (ICC), standard error of measurement (SEM), SEM as a percentage of the mean (SEM%) and minimal detectable change at a 95% confidence interval (MDC95) were calculated for this measure of EHAD strength.
Results
Test re-test reliability was good for EHAD strength measured during the CAE on dominant (ICC = 0.84; SEM% = 3.6%; MDC95 = 33 N) and non-dominant (ICC = 0.87; SEM% = 3.3%; MDC95 = 29 N) legs.
Conclusions
This study provides proof-of-concept that EHAD strength can be measured during the CAE with good test re-test reliability.
Keywords
Date
2025
Type
Journal article
Journal
Physical Therapy in Sport
Book
Volume
73
Issue
Page Range
34-38
Article Number
ACU Department
School of Behavioural and Health Sciences
Faculty of Health Sciences
Faculty of Health Sciences
Relation URI
Source URL
Event URL
Open Access Status
Published as ‘gold’ (paid) open access
License
CC BY 4.0
File Access
Open
Notes
2025 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).