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 ...

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 ...

A strong core is essential for balance, posture, injury prevention, and overall functional strength across all age groups.

Even as a personal trainer, I was not chomping at the bit to get back into exercise. I really wanted to take my time, make sure I had healed, and give my body the recovery time it needed before ...

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