Merck Manual

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Exercises to Prevent Low Back Pain (3)
Exercises to Prevent Low Back Pain (3)
Exercises to Prevent Low Back Pain (3)

Knee-to-Chest Stretch

Lie flat on the back. Place both hands behind one knee and bring it to the chest. Hold for a count of 10. Slowly lower that leg and repeat with the other leg. Do this exercise 10 times.