Helen Mirren CBD Gummies The better the arch, the extra you get "pushed" onto the out of doors of your foot. To see what this does to the Piriformis Muscle; get up, put your fingers on your upper buttocks inside the vicinity of the piriformis. Now, roll your weight out onto the outsides of your ft. Notice how the Piriformis Muscle instantly turns into tight as a drum? This is what goes on all day lengthy if you have excessive arches.