Both sit-ups and crunches can help target your core muscles, but there are key differences between the two ab workouts.

Building a strong core means far more than just flattening your stomach or sculpting visible abs. Your deep core refers to a group of muscles that stabilize your spine, pelvis, and internal organs, ...

A stomach bulge during sit-ups may mean diastasis recti or a hernia. Both conditions are treatable, often with exercise or medical intervention.

They’re often lumped together as “ab exercises,” but crunches and situps aren’t the same thing — and choosing the right one can impact your results (and your spine). So, if your goal is stronger abs, ...