Come to a seated position on an exercise mat with your back straight, chest lifted and hands placed flat on the mat directly behind you. Place both your legs in front of you; bending your right knee so you can place your right foot flat on the floor, whilst fully extending your left leg. Place a foam roller perpendicular to your body, under the middle of your left thigh. Shift your weight into your hands and elevate your glutes an inch off the floor. This is your start position. Keeping your left foot gently flexed towards your shin, gently roll your thigh back and forth on the foam roller, feeling for any specific areas of tension in your hamstrings. Repeat for the recommended amount of time before changing to the other side.