After 3 years of not being able to run properly due to an ongoing issue, even sitting in the car or at my desk at work & even the couch and would wake during the night with numbness & tingling down my leg,no one could diagnose, MRI, xrays, ultrasound, nerve test, every chiropractor in town & one out , osteopathy, massage, this unit has given me relief, I must use it regularly however but it has helped alot (self diagnosed sciatica)