As the title says I've DDD and love keeping active. It's taken me a year to get my back built up again after finding out I'd 2 disc prolapses in L4-L5. My question is am I doing too much sport? Each week I would do one class of spinning, yogalates, circuit training and pilates. I also do road cycling - doing maybe 20-30 miles on a normal cycle 2-3 times a week. I know myself if I sit and do nothing my back gets very stiff. I also am very careful when doing exercise and hold my posture correctly and rest if am too sore. Any advice appreciated?