Muscle isn't the only thing that matters. Here's how you can tap your hidden potential—and bulletproof against injury.

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 ...

Ah, hamstrings: the middle child of muscle groups. While they might not be the sexiest parts of our bodies, strong hamstrings play a vital role in our overall strength and stability. To learn more ...

The hamstring muscle group consists of three distinct sections. The two inner, or medial muscles are known as the semitendinosus and semimembranosus and the outer, or lateral, muscle is the bicep ...

Muscle isn't the only thing that matters. Here's how you can tap your hidden potential – and bulletproof against injury.

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 ...