Pain that begins in the lower back and runs down the back of the legs is Sciatica. It is caused by sciatic nerve irritation or compression of nerves in the spinal column that make up the sciatic nerve. People in their 50's are commonly afflicted with sciatica which is often caused by being overweight, poor muscle tone, slipped discs, poor physical condition, poor posture, and physical injury.
Sciatica problems have often been shown to respond well to chiropractic methods. Realignment of the spinal discs serves to minimize distress on the nerves.