Too Much Training Can Tax Athletes' Brains Enlarge this image toggle caption Markus Büsges/EyeEm/Getty Images Markus Büsges/EyeEm/Getty Images Too much physical exertion appears to make the brain tired. Sponsor Message "Probably something linked to his brain and his cognitive capacities," says Bastien Blain, an author of the study and a postdoctoral fellow at University College London. "Those people were, in …
