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

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." That's why it pays to dedicate focused training time on your core. You can start with these ab exercises ...

Sit-ups and crunches both target your core muscles, but work differently. You can use both exercises to build strength, endurance, and control.

Medically reviewed by Mallory Christopherson DC, FMT, CSCS Side planks trains your obliques with movements like twisting and ...

Many think of the practice as stretching, but deep core exercises in yoga are one of the "most powerful ways to build ...

The dead bug exercise may have a funny name, but it's a seriously effective move. The slow and controlled core strengthening exercise involves lying on your back and moving your arms and legs in a way ...

A quick scan of any gym will show you: Abs exercises are one of the most popular ways people fill their workout time. That’s great—but many folks fall into the trap of prioritizing core workouts in ...