Stretch #1
1) Lie on your back with your knees bent and feet flat on the floor
2) Place your bands on the back of your thighs and pull your legs toward your chest
3) Pull until a gentle stretch is felt
4) Hold for 15 seconds
5) Return to the starting position
Stretch #2
1) Lie on your back with your knees bent and feet flat on the floor
2) Keeping your back flat on the floor, rotate your hips to the left, lowering your legs down to the floor until a gentle stretch is felt
3) Hold for 15 seconds
4) Return to the starting position
5) Repeat 10 more times
6) Keeping your back flat on the floor, this time rotate your hips to the right, lowering your legs down to the floor until a gentle stretch is felt
7) Hold for 15 seconds
8) Return to the starting position
9) Repeat 10 more times
Stretch #3
1) Lie on your stomach
2) Prop yourself up on your elbows extending your back
3) Start straightening your elbows, further extending your back
4) Continue straightening your elbows until a gentle stretch is felt
5) Hold for 15 seconds
6) Return to the starting position
Here you go, i got those from a website, and my father, who has back problems, use these so they should be fine..
hope i helped