+1. They're useless. You'll just get muscle relaxants and instructions to stop riding.

I took my own counsel and went to a pro massage therapist with specialty in sports overuse injuries.
The session helped, of course, but what was of even greater value is we were able to identify precisely which muscles were well on their way to cutting my season short. The stretches I'd been doing werent hitting the these hotspots. In a few minutes I learned new ones that did.