ARE YOU SPENDING your summer crunching away, trying to get visible abs for the remainder of the sunny season? You can pile up all the situp reps you want, but you won't be much closer to the core ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." That's why it pays to dedicate focused training time on your core. You can start with these ab exercises ...

Lift your legs off the floor and pull your shoulders down, squeezing to engage your upper back. Turn the pits of your elbows ...

When you think of a fit physique, you likely picture "flat abs" or "six-pack" abs, though how long it take to get abs and maintaining them is no small feat. As we age, muscle mass decreases and belly ...