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Teen Health

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Concussion Recovery Might Reverse After Doing This

Expert and researcher say the findings highlight need for slow return to playing field

WebMD News from HealthDay

By Amy Norton

HealthDay Reporter

THURSDAY, Aug. 28, 2014 (HealthDay News) -- Athletes who seem to have recovered from a concussion may actually show a subtle worsening in a particular mental ability after they return to exercise, a small study suggests.

The findings come from a study of 19 high school athletes who suffered a concussion and then got medical clearance to return to physical activity -- most often football, although a few were on soccer, wrestling or volleyball teams.

Researchers found that for 12 of those athletes, a particular mental ability that had been improving post-concussion reversed course once they were up and moving again.

Specifically, the athletes' ability to simultaneously walk and do simple mental tasks "regressed," the researchers report in the journal Medicine & Science in Sports & Exercise.

In real-life terms, that means walking down the street while talking to a friend would be a bit harder, explained Li-Shan Chou, one of the researchers on the study.

The shift would be too subtle for a person to actually notice, said Chou, a professor of human physiology at the University of Oregon in Eugene.

But he and his colleagues were able to detect the regression in lab tests where the athletes walked while performing basic mental tasks -- like listening to a spoken word, then saying whether it was a high or low pitch.

What does it all mean? That's not clear, said Kenneth Podell, a concussion expert who was not involved in the study.

For one, since the study group was so small, the findings need to be replicated in larger studies to know whether they are "real," according to Podell, co-director of the Houston Methodist Concussion Center in Texas.

He also questioned how the athletes could show an improvement in their test performance early on, when they were "most concussed," but then worsen after all their other signs and symptoms had improved.

Chou agreed that the implications of his findings are unclear. For now, he said the study highlights the importance of giving concussions time to heal.

"Have patience, and give the brain time to recover," Chou added.

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