If you’re looking to tone your core, the bicycle crunch is a good addition to your workout. It has the benefits of the standard crunch, but it engages additional core muscles — working your internal ...

Looking to amp up your core workout with a move that really targets those stubborn lower abs? Enter the reverse crunch. This exercise zeroes in on those hard-to-reach lower abdominal muscles, helping ...

According to a Pilates pro, the proper form for crunches doesn't involve crunching up with your hands behind your head because it can lead to neck pain. If someone tells you to drop down and knock out ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." If you've completed a core workout—or 100 of them—over the years, you likely know what crunches are ...

Welcome to Start TODAY. Sign up for our free Start TODAY newsletter to receive daily inspiration sent to your inbox — and join us on Instagram! Many people don’t use correct form when doing core ...