I have not had anyone look at my running technique because i am not running anymore because of this. I will have someone take a look once i get back to running. I do not have the feeling that my hamstrings are tight. I just get a sharp pain in the high hamstring/butt when sitting or running. I can really feel it if i do a bent leg toe touch even when laying on my back to protect my back. Any type of static streching also seems to inflame the area. Currently I am working on my calfs, hamstrings, glutes, adductors, piriformis with the lacrosse ball multiple times daily and the results are always for just a few minutes to a hour.