Abstract
Background: The purpose of this study was to systematically review the scientific literature about the benefits of using the Copenhagen Adductor (CA) exercise to improve eccentric hip adduction strength (EHAD), as well as to provide directions for training. Methods: A systematic search was conducted in three electronic databases following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The inclusion criteria were: (a) EHAD as outcome variable, with means and standard deviations before and after the intervention, (b) the study was a randomized controlled trial using the CA in the program intervention, (c) the article was written in English. The quality of evidence was evaluated according to the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) guidelines. A mini meta-analysis was performed to determine the overall effect. Results: Three studies were selected and included in this systematic review and mini meta-analysis. All articles reported significant enhancement in EHAD in football (soccer) players. The overall effect for the EHAD test was significant in favor to CA group (mean difference = 0.61; 95% CI from 0.20 to 1.01; p = 0.003) with large heterogeneity. Conclusions: CA exercise performed 2–3 times for 8 weeks is useful for improving EHAD in football players.
Highlights
Muscle injuries are common in many sports, such as basketball [1], rugby [2], football [3], tennis [4], track and field [5]
The review was conducted following the statements of the Preferred Reporting Items for Systematic
A total of 126 records were identified, eight of which were removed because they were duplicates
Summary
Muscle injuries are common in many sports, such as basketball [1], rugby [2], football [3], tennis [4], track and field [5]. Ice hockey and football are susceptible to many adductor muscle strains [7]. In this regard, the adductor injury is the second most common muscle injury among football players [3] and is associated with lost competition time [8]. The low level of adductor muscle strength has been linked to the possibility of suffering an injury for instance in ice hockey, where the muscle strength ratio between adduction and abduction has been reported as a risk factor [9]. The purpose of this study was to systematically review the scientific literature about the benefits of using the Copenhagen Adductor (CA) exercise to improve eccentric hip adduction strength (EHAD), as well as to provide directions for training. All articles reported significant enhancement in EHAD in football (soccer) players
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