Stand tall with back straight, abs engaged, shoulders down, and feet hip-width apart. Bring your left leg forward, heel down, toes up and leg straight.
Keeping back straight and abs engaged, bend the right knee as if sitting back, while supporting yourself with both hands on your thighs.
Breathe deeply and hold for 10-30 seconds. Repeat on opposite side.
Stretch to the point of "mild discomfort," not to the point of pain. Never bounce. Straighten but do not lock the knee of your forward leg. Keep back straight--do not arch or round the back-- and chest lifted.
Muscles Stretched: Hamstrings, glutes