It pays to pay attention to your hamstrings. Just ask celebrity trainer Ashley Borden. The Los Angeles–based creator of her namesake fitness app, whose clients have included Christina Aguilera, ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Nordic curls are a bit of a gymgoer's party trick. As you lower the backside of your body backwards ...

Any time you walk, climb stairs, or even sit down in a chair, you're activating your hamstring muscles. Therefore, keeping those muscles strong is important for basic, daily mobility. But that's not ...