THE LEG CURL is one of the best machines for building hamstring strength and size. If you don't have one handy, though, what's the next best option? There are two types of hamstring curl machines, and ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." THE LEG CURL is one of the best machines—and best methods, period—for building hamstring strength and ...

When it comes to lower-body exercises, big compound movements like squats and lunges may be where our thoughts initially turn for building general strength. But leg curls can be a much-needed addition ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. For strong, powerful ...