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

If you complete 100 abdominal crunches a day, you might build a little muscle, but more likely, you’ll be left with sore muscles and not much else. The crunch and its relative, the sit-up, can each ...

Mind-body coach Dana Santas shows how you can create strength gains without gym equipment by progressing body-weight exercises safely and effectively.

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

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Skip ab machines. Build a stronger core after 40 with 4 bodyweight moves: shoulder taps, dead bugs, side planks, hollow holds.

Think of strength as insurance. Maybe you don't care about how much you can lift, but you should want to know how to get stronger so you can live life to the fullest. Strong legs help you kick a ball ...

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

When most people think of core exercises, they think crunches and sit-ups – possibly because the tactical professions have used them for decades. But given recent changes in military testing, the next ...