Pilates may seem like a modern-day trend, with contemporary stars of all ages like Martha Stewart, Lady Gaga and Kylie Jenner reportedly swearing by the workout. Yet, it's been around since Joseph ...

Sit-ups are often touted as the go-to exercise for a flat belly, but they may not be as effective as many think ...

When most people think of a strong core or achieving abs, the first exercise that comes to mind is often sit-ups. While sit-ups have long been a go-to for strengthening the core, they're not always ...

Core training has always been part of military PT and fitness testing. From crunches to sit-ups, flutter kicks, leg tucks and plank poses, the U.S. military uses many exercises to test core strength.

Q: I have heard that doing sit-ups and crunches does not burn stomach fat and that they in fact build muscles underneath the fat, thus making your stomach look bigger. An exercise equipment salesman ...