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 ...

Hamstring strains are one of the most common—and frustrating—soft-tissue injuries suffered by athletes. There are two main types: an acute strain and a proximal hamstring tendinopathy, a ...

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 ...