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 ...

A PT explains what these numbers actually mean, and why quality reps and proper form matter more than chasing high totals ...

The crunch is a classic ab exercise. It’s also pretty straightforward: Lie on your back with your knees bent and feet flat on the floor, contract your abdominals, and lift your shoulders, neck, and ...

"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 ...

Master these classic core exercises (they're not the same!). Javier Zayas Photography/Getty Images If you’re a fan of core exercises, chances are both sit-ups and crunches are a staple of your workout ...

Cable crunches are safe and effective for strengthening your core, making them a staple exercise at the gym. The advantage of using cables is that they’re constantly providing tension. However, ...

"Trainers—myself included—often cue supine spinal flexion because it gives such a satisfying burn and you can really feel like you're doing something—and I find that it's actually helpful with posture ...