Instructions
Sit on the ground and position a foam roller underneath your hamstrings (back part of the thigh). Make sure that you begin towards the bottom of the muscle, near the knee.
Place your hands behind you and lift yourself off the ground.
Slowly move yourself forward allowing your hamstrings to roll 2 to 3 inches on the foam roller. Pause then roll the other way. Continue the back and forth motion. For a deeper stretch, try stacking one leg over the other.