pain while standing, but not while walking or running or sitting. am a 50 year old male; I do 9 miles a day on an elliptical machine (have been doing this for the past nine years). lift at the gym three time a week and am slightly overweight. standing back pain started march 2016 and has not gotten better since. first thought it might be sciatica or anterior pelvic tilt. Stretches for APT seemed to help a little for a while, but after a time the pain came back, full force, regardless of stretching.