Knee-to-chest stretch

Lie on your back with your knees bent and your feet flat on the floor (A). Using both hands, pull up one knee and press it toward your chest (B). Tighten the muscles in your belly and press your spine to the floor. Hold for five seconds. Return to the starting position and repeat with the other leg (C). Go back to the starting position. Then repeat with both legs at the same time (D). Repeat each stretch 2 to 3 times. Do the full routine once in the morning and once in the evening if possible.