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03 Apr2017

03 April 2017.

Written by José Pedro Correia
Posted in Hip

03-04-2017 08:30:16
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Eccentric strength increase using the Copenhagen exercise

This randomized controlled trial found a significant increase of 36% in eccentric hip adduction strength (EHAD) and a 20% increase in eccentric hip abduction (EHAB) strength after a 8-week Copenhagen adduction exercise (CA) protocol in sub-elite football players. Increasing hamstring eccentric strength has been shown to reduce hamstring injuries. Thus, the CA seems a promising way of reducing adductor-related injuries in footballers.

Hip adductor muscle injuries are the most common acute groin injury in athletes. Weak hip adduction strength has shown to be a risk factor for sustaining hip adductor injuries. There are only few trials concerning groin injury prevention, involving complex programs with no significant effects. A simpler, dynamic alternative like the CA could provide an implementation advantage.

20 players from 2 under-19 sub-elite football clubs were randomly allocated to intervention and control groups. The intervention group performed a 8-week protocol of the Copenhagen Adduction exercise (CA). Players performed 2 sessions/ week containing 2-3 sets of 6-15 repetitions. Outcome measures were maximal EHAD, EHAB, lateral abdominal endurance and EHAD/ EHAB ratio. Mean differences pre-and post intervention and between groups were assessed.

EHAD, EHAB and EHAD/ EHAB ratio showed significant increases of 35.7%, 20.3% and 12.3% in the intervention group. These results show, albeit in a small sample, that a simple, dynamic exercise can have a significant effect in EHAD. Increases in eccentric strength and optimization of the length-tension relationship have shown to reduce hamstring injuries in footballers. Thus, the CA seems a promising method of reducing adductor-related groin injuries in footballers. 

> From: Ishøi et al., Scand J Med Sci Sports 26 (2017) 1334-1342(Epub ahead of print). All rights reserved to John Wiley & Sons, Ltd. Click here for the online summary.

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About the Author
José Pedro Correia
José Pedro Correia
José Pedro graduated from Porto Polytechnic Institute's Higher School of Health Technologies (BSc Physiotherapy) in 2010 and obtained an MSc in ...

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  • Articles
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