Aantal gezegden is 1469558
varav 1407627 på engelska
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Denna sidan visar ordspråk som liknar "There is still a lot to learn about how exercise affects the immune system, because it's difficult for researchers to assess the many layers of protection within the system. Strenuous or prolonged exercise seems to suppress the immune system, leaving athletes more susceptible to illness for one to six hours following a hard workout - the so-called open window.".