HOW CAN I OVERCOME MY LOW BACK PAIN PROBLEM?

I SUFFERED FROM L-4 L-5 DISC PROLAPSE IN THE YEAR 2008. SINCE THEN I AM CONTINUOSLY DOING MORNING WALK COVERING 3.5 KMS. IN 40 MIN & YOGA COVERING ALMOST ALL THE BODY PARTS. ALL WAS WELL UNTILL LAST MONTH WHEN THE LOW BACK PAIN STRIKE AGAIN. SHALL I CONTINUE WITH MORNING WALK. KINDLY SUGGEST.