Hello: I Have Been Active All My Life. Walking, Aerobics

Hello: I have been active all my life. Walking, aerobics and also tried Zumba classes but have had to stop about a year ago. I have had lower back pain for quite sometime and lately noticed alot of pain and grinding. I have had an MRI which showed a pulging disk plus arthritis. I see a physio therapist periodically but still in alot of pain. I was told there is no cure for this! Just to keep on exercising and moving. My Dr. prescribed celebrex but have stopped taking it after reading all the side effects. Is there anything I can do to keep it from getting worse?

Maria