In TODAY.com's Expert Tip of the Day, a trainer reveals her favorite exercise for a more defined waistline and strong core ...

When you think of a strong core, the image of six-pack abs likely comes to mind. But you may be surprised to learn that the most important core muscles are actually those you can’t see with the naked ...

Start on your back with your arms straight above you, and your knees in a tabletop position. Engage your abs, then raise your ...

You’ve probably seen it all over your feeds: Fitness pros and physical therapists talking about “training the deep core.” But unlike crunches or Russian twists, these exercises don’t come with a pump ...

A weak core could increase your risk of lower-body injuries and keep athletes on the sidelines. Let’s explore the research.

Learn how to do the Copenhagen plank, a challenging side plank variation that strengthens your hips and core and improves ...

Pregnancy does some pretty incredible things to your body, but for many women, it can also leave you feeling a little unfamiliar in your own skin afterward. One of the most common changes is diastasis ...

This is a classic bodybuilder pose—but TikTok trends claim it will train your six-pack. Experts break down the truth.