Eccentric exercise restored the strength of the injured evertor muscles in study participants with their 1st ankle sprain while engaged in sports activity, say authors of an article published in the April issue (Vol 2 Issue 2) of Scandinavian Journal of Medicine and Science in Sports. These results show the value of the exercise, especially as the weakness of these muscles after sprains is one of the main risk factors contributing to instability and the recurrence of sprains, they add.

18 participants were studied to receive physical therapy, including concentric or eccentric strengthening of the evertor ankle muscles. At the end of the physical therapy, the strength of the evertor muscles was tested. After the concentric training, there was both significant concentric and eccentric strength deficit in comparison with the healthy side. After the eccentric strengthening, the muscle strength was significantly greater during concentric movements as well.

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