The amount of energy expenditure while exercising will generally not directly impact the injury to the disc. It is BLT or bend, lift, twist that affects the lumbar disc. If you picked an activity such as road biking, that would not cause significant increased disc wear. Now however, if you started squats/weight lifting, the disc will prematurely wear.
Will symptoms of tingling and cramping eventually go away, I cannot say. They should improve with time (months to years) but may not totally disappear.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.