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Eccentric strength increase using the Copenhagen exercise

A promising way of reducing adductor-related injuries in footballers?

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.

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 (2017-04-03 09:07:56) 1334-1342 (Epub ahead of print). All rights reserved to John Wiley & Sons, Ltd. Click here for the online summary.

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