Add Yahoo as a preferred source to see more of our stories on Google. Looking for a quick ab workout to fire up your core? This seven-minute intense ab challenge targets your lower abs with no ...

Pete Nastasi, C.P.T., C.S.N.C. View post: Inside One Athlete's Brutal Quest to Break Everest’s Speed Record If you’ve been training for a while, you’ve probably heard the saying that abs are built in ...