Add Yahoo as a preferred source to see more of our stories on Google. Mat Fraser is the fittest man on Earth. Granted, that's a bold claim, and hard to substantiate. It's dependent on how one defines ...

Do you even rest, bro? Doing CrossFit-style workouts two days in a row could damage a person’s immune system, according to a new study. “A rest day is important for recovery for subsequent training ...

Experts have warned that doing CrossFit classes two days in a row could damage fitness enthusiast's immune systems. They warn that although Current trends in the fitness industry have seen more people ...