How to get a six pack

Crunches are a lot like sit-ups, except that instead of lifting your entire back off the floor, you only lift your upper back. This isolates ("crunches") the ab muscles without engaging muscles in your hips. Crunches are also safer than sit-ups because they don't compress your spine as much.[1] When paired with adequate weight loss, doing crunches regularly can lead to six-pack abs. If your goal is simply a flat stomach, however, spot...