Stand tall with back straight, feet wider than the hips, toes turned out, abs engaged and arms at your sides.
Keeping the legs straight and the abs engaged, slowly bend forward from the waist until you fingertips reach the floor--ideally, with your back in a flat position. From there, stretch deeper, as if your body is folding in half at the waist, allowing your elbows to bend and your head to relax towards the floor beneath you.
Breathe deeply and hold for 10-30 seconds.
Make sure you master the "Wide-Leg Modified Forward Bend" before trying this deeper stretch. Stretch to the point of "mild discomfort," not to the point of pain. Never bounce. Keep your abs in to protect your back.
Muscles Stretched: Hamstrings, back