I have read alot on this since being diagnosed by my physio.
Have been out for 6 weeks with this, after running on it (+ a race) for 3 weeks prior.
Physio loosened all the surrounding muscles by manipulation until we isolated the piriformis, and more specifically the nerve aggravated by it.
I got to the stage where the muscle itself wasn't causing me grief and the nerve could be strtched out. Did some swimming and pool running in the intervening time.
Read about the tennis ball, so bought one and used it friday last week. Was a little uncomfortable but felt as though i was stretching out the right area.
I went for a 2.5 mile run saturday and if I go anywhere near that tennis ball it hurts like hell.
It's now tuesday and I feel like I'm going backwards, and that i should never have used the ball in the first place.
Any thoughts much appreciated as I have been so patient with this.
I'm working on the basis that if the ball hurts like hell (very specific area though) that i should not run ?