When performing a stretching program, you should continue through the exercise until a gentle stretch is felt. You should not experience any pain or significant discomfort. If this is the case, you are stretching too far for your current level, and muscle tears and injuries can occur. Avoid any bouncing motions, keeping your movement slow and smooth. After completing your stretches, drink plenty of water to re-hydrate.
Try some of these stretches and make up your own routine:
Low Back Stretches
Exercises to Prevent Low Back Pain
