A well-rounded ab workout will strengthen your core, tone your midsection and help prevent and reduce back pain.

When it comes to hip stretches that really get in there and sort things out, the 90-90 stretch is where it’s at. This move not only feels amazing, but it also helps increase the flexibility and ...

Step 1: Lie on your back with one leg bent at about a 90-degree angle and the other leg straight. Step 2: With thigh muscles tight, raise the straight leg about a foot off the ground and hold.

Lie face up on the edge of a bed or table so your legs hang off at 90-degree angles. From there, bring both knees toward your chest—keep your back still and flat—then slowly straighten one leg ...

Stand tall, back straight. Step forward with one leg, bending both knees to form 90-degree angles. Push off the front foot to return to the starting position, and repeat with the opposite leg.