Doing crunches is a great way to build your core strength, but that can only happen if you're doing them correctly. Here, a ...

The plank hold is a basic exercise that engages the whole core. To do a plank, lie face down with your forearms and toes ...

No matter which variations you follow, crunches have the advantage over sit-ups of being able to better target abdominal muscles. "Because the movement is smaller, you can control momentum more," ...