SynthesisScandinavian journal of medicine & science in sports2025
The Copenhagen Adduction Exercise Effect on Sport Performance and Injury Prevention: A Systematic Review With Meta-Analysis.
Synthesis in Scandinavian journal of medicine & science in sports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It has been retracted, and should not be counted. Cited by 2 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed, 1 synthesis or guideline pooled it.
- The Copenhagen Adduction Exercise Effect on Sport Performance and Injury Prevention: A Systematic Review With Meta-Analysis.Scandinavian journal of medicine & science in sports · 2025Pooled it
- Review
Corrections and comments
- Retracted
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The popularity of the Copenhagen Adduction Exercise (CAE) has risen in recent years. This review aims to evaluate the available evidence on the isolated use of the CAE for both performance enhancement and injury prevention. This systematic review included prospective interventional studies investigating the effect of the CAE on strength and conditioning and injury prevention outcomes. 15 studies were included, comprising randomized controlled trials (n = 4), cluster-randomized controlled trials (n = 6), and pre-post trials (n = 5). These studies assessed adduction and abduction strength, jump and sprint performance, core endurance, dynamic balance, adductor longus muscle thickness, and the seasonal prevalence of groin injuries. Meta-analyses of within-group changes and between-group comparisons were performed using standardized mean differences (SMDs) and relative risk (RR). The implementation of the CAE yielded large effect sizes for adduction (within-group SMD = 0.72, 95% CI = 0.41 to 1.0; between-group SMD = 0.95, 95% CI = 0.18 to 1.7) and abduction (within-group SMD = 0.92, 95% CI = 0.47 to 1.4; between-group SMD = 0.94, 95% CI = 0.33 to 1.56) strength. Adduction strength adaptations were dependent on the repetitions performed (adherence-adjusted repetitions: p = 0.02; adherence-adjusted weekly repetitions: p = 0.0063). Dynamic balance can also be improved using the CAE (within-group SMD = 3.9). The CAE showed no statistically significant effect on seasonal groin injury prevalence (RR = 0.83, 95% CI = 0.41 to 1.68). There were no additional benefits of the intervention for other performance metrics, and the quality of evidence underpinning all findings was rated as very low. The inclusion of the CAE can be recommended for adductor strength training, although current evidence does not support its use for reducing the risk of sustaining groin injuries. Registration Number: https://doi.org/10.17605/OSF.IO/CA7JW.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.