Heat, humidity and flexibility are all risk factors for pulls and strains.
From early pig bladders to high-tech wonders, the colorful sphere that makes soccer possible has seen plenty of changes over the course of centuries.
Some soccer teams are banning their players from having sex while they are competing in the World Cup. Laci Green and Sourcefed's Steve Zaragoza have the skinny on how abstinence affects athletes.
The Boston Marathon returned Monday, April 21, amid a major security presence prompted by last year's deadly bombings.