The effectiveness of the Copenhagen adduction exercise on improving eccentric hip adduction strength among soccer players with groin injury: a randomized controlled trial

Ahmed A Alsirhani, Qassim I Muaidi, Wesam Saleh A Al Attar, Kristian Thorborg, Mohamed A Husain, Shibili Nuhmani

Abstract

INTRODUCTION: Groin injuries are common in soccer players and often involve adductor muscle strains. The Copenhagen Adduction Exercise (CAE) is a targeted intervention whose effectiveness in rehabilitation for these injuries warrants investigation.

OBJECTIVE: To investigate the impact of a rehabilitation program, which includes the CAE, on eccentric hip adduction (EHAD) strength, hip joint range of motion (ROM), self-reported disability, and pain among soccer players with adductor-related groin pain. It was hypothesized that the addition of CAE to the rehabilitation program would yield greater improvements.

METHODS: Employing a randomized controlled trial with a two-group parallel design, thirty male soccer players with a mean age of 26.4 ± 3.9 years were randomized into an intervention group (IG) including CAE (n = 15) and a control group (CG) without CAE (n = 15), based on a power analysis to ensure 80% power to detect significant differences. Both groups engaged in their respective rehabilitation programs twice a week for eight weeks. The primary outcome measured was EHAD strength, while secondary outcomes included hip joint ROM, self-reported disability measured by the Copenhagen Hip and Groin Outcome Score (HAGOS), and pain levels.

RESULTS: Significant improvements within groups were observed across all measures (p < 0.001). The IG demonstrated a greater increase in EHAD strength (Mean Difference [MD] = 0.29 Nm/kg, 95% Confidence Interval [CI] [0.11, 0.46]), a more pronounced reduction in pain (MD = -0.97, 95% CI [-1.72, -0.21]), and betterment in all HAGOS subscale scores compared to the CG. There were no significant between-group differences in hip joint ROM.

CONCLUSION: Incorporating the CAE into rehabilitation programs significantly improves EHAD strength, decreases pain scores, and reduces self-reported disability in soccer players with adductor-related groin pain.

REGISTRATION: ClinicalTrials.gov identifier: NCT05589623.

Original languageEnglish
JournalPhysician and Sportsmedicine
ISSN0091-3847
DOIs
Publication statusE-pub ahead of print - 20 Feb 2024

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