Stand on your right leg with your knees touching. If you need to, extend your arm out for balance or grab hold of a chair or wall for support.
Grab your left foot with your left hand and pull your heel toward your butt, keeping your knee pointed to the ground. Do your best to keep your chest upright, and don't worry about how close your foot is to your butt. Focus on the stretch on your left quad.
Hold for 30 seconds, then repeat on the opposite leg.