This is a good stretch for people who suffer from sciatica and have consulted with their physician.

To perform the piriformis stretch:

1. Lie comfortably face up on the floor with your legs straight.
2. Raise your right leg as close to vertical as possible while bending your right knee 15°.
3. Cross your right leg over your body towards the lowest left rib. Your right hip should maintain contact with the floor during the stretch.
4. Use your hands to gently apply an additional 1 lb. of force to the stretch.
5. Hold this position for 1.5 - 2 seconds then return to the starting position.

Repeat the above steps for a total of 1 - 2 sets of 10 - 15 repetitions on both the right and left side.