This exercise strengthens the calves, hamstrings, glutes and spinal erectors (the muscles that stabilize the spine). Step 1: Lie flat on your back with a large exercise ball at your feet. Extend your ...

The hamstring muscles are often overlooked, yet they play a pivotal role in exercise performance and mobility. Though you’ve probably seen fitness gurus sharing their intense hamstring workouts, you ...

"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 ...

When it comes to knowing which hamstring exercises could actually benefit you, the lines are blurred. Contrary to popular opinion, studies show that squats will have barely any effect on the ...

The three powerful muscles running down the back of your thigh are the semitendinosus, semimembranosus, and the bicep femoris. Together, these muscles are known as your hamstrings. The hamstring is ...

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 ...