Happy St Patricks day.
Time to treat your ass.
Time for some Ass Anatomy.
There is a turning, rotating muscle in your Ass Called the Piriformis. Because you sit on it, it sometimes gets cross.
One of the things you need to do to have a Happy Ass is to un-spasm your Piriformis.
Task: try this drill: 20% of your energy for 20% of the time