"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 ...

Our core is made up of four muscle groups that are essential to everyday movements, like walking and lifting. And when people think about core strengthening, crunches are often the first thing that ...

If you’re a little hazy on the difference between sit-ups vs. crunches, you’re not alone. They both strengthen your core, but the details on how they differ and the benefits of each can be confusing. ...

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, ...

Bicycle crunches are a great exercise for building core strength in runners – and they are a fair bit harder than they look. Now, we don’t have to remind you of the importance of doing strength ...