Tips for lower back

Prevent it: You're going to sit. So try these tactics to lessen its impact on your back:

Get up and move at least once every 20 minutes, unless you're driving. Set your screen saver to remind you; make a habit of going for a drink of water; when you answer the phone, stand up to stretch and change positions.
Keep your spine properly aligned by holding reading material at eye level (when sitting or standing) rather than bending over. Don't lean over a desk or table to work. Whenever possible, your spine should be straight.
Choose a chair that supports your back. Adjust the chair so that your feet stay flat on the floor. If the chair doesn't support your lower back's curve, place a rolled towel or small pillow behind your lower back. Remove anything from your back pockets, especially a wallet, if you'll be seated for long periods of time because this puts your spine out of alignment.
Gokhale suggests doing the following exercises to help lengthen your spine:
Get on your hands and knees. Reach your left arm straight ahead and straighten your right leg behind you. Use your stomach muscles to stabilize. Hold for 5-10 seconds and slowly return to starting position. Switch arm and leg. Repeat 3-5 times on each side.
Sit tall, lengthen your spine, and let your shoulders relax. Concentrate on squeezing your shoulder blades together, keeping your arms hanging at your sides. Hold for 3-5 seconds, then release. Repeat 10-20 times.