Hello,
It is important to keep exercise fun, enjoyable and pain free. I recommend talking to your physician about an exercise program that would be good for you. As you know, increasing your back pain will just make exercise even more difficult, so you'll want guidance from a health care provider on a safe and fun exercise program that is sustainable for you. Here are a few links that might also be helpful: http://www.mayoclinic.org/healthy-lifestyle/fitness/in-depth/fitness/art-20045099
http://www.mayoclinic.org/healthy-lifestyle/fitness/in-depth/exercise-and-chronic-disease/art-20046049

The Mayo Clinic Healthy Living Program also has a variety of comprehensive and focused experiences that can be customized to fit your goals, lifestyle, and health needs. The two that come to mind would be the Mayo Clinic Diet Experience or one of the Physical Activity Assessments. Here is a link: https://healthyliving.mayoclinic.org/offerings.php