Know it: This muscle near your gluteal (butt) region helps with thigh rotation and tends to suffer from overuse. Why? Because weak hamstrings and glutes force the piriformis to take on some of the work those big muscles should be doing, says Keith Scott, C.S.C.S., a strength coach based in New Jersey.
"There is another world, but it's inside this one" -Paul Éluard Do the Celestial Crawl On a cloudless warm night, walk around until you can put a nearby building or tree very close to a bright star in the eastern sky. Now lay on the ground and move yourself until the corner of the building or the top of the tree just BARELY covers that star.