Credit: Photograph by Justin Steele

Why: Increasing range of motion at the knees without negatively affecting quad strength – as a basic quad stretch can.

Who: For athletes with high knee-injury rates, like basketball and soccer players, but also quad-reliant cyclists.

How: Lie facedown with your forearms on the floor and both thighs on the roller. Roll your quads back and forth, lingering on the most painful spots.