LEAVE THE PIRIFORMIS ALONE!
9/10 times someone is getting hip pain or back pain or glute pain… the piriformis gets the blame!! 
It’s just one muscle in an entire complex of muscles, nerves, bones and all that magic that holds you together.
MORE MORRISON HIP-PLAYLIST VIDEOS HERE:
https://youtube.com/playlist?list=PLZmnpc7O7J4H4bgt9cD_UvgA9i-MAG3K-