Stand in front of a chair or bench. Balance one leg on the chair/bench. Keep your leg straight do not bend the knee, (for extra support try holding onto a doorway or wall) Point toes upward and hold stretch for 30 seconds. You should feel the stretch in your hamstring straight away. For a deeper stretch, keep your back straight and lean forward at the hips. Hold the deeper stretch for only 10 seconds then swap sides doing the light stretch first for 30 seconds and then leaning forward for a deeper stretch for 10.