"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 ...

Hamstring tightness occurs when the muscles on the back of the thighs become shortened due to injury, sitting for long periods, muscle overuse, or a history of inactivity. The hamstrings consist of ...

You’ll know the feeling if you have tight hamstrings – your strides feel shorter, it seems like you’re working harder than usual and your legs feel stiff and restricted. Going faster or tackling hills ...