Put one leg straight in front of you and the other one tucked into that leg. Sit up straight and fold forward. Try not to round your back. Only reach as far down the straight leg as is comfortable. The goal is to grab your foot, but work your way up to that and stop when you feel tension. Hold for at least 30 seconds; breathing through the stretch and slowly stretching as muscles allow. This should be slightly uncomfortable, not painful. Repeat on other side.