I was diagnosed with the same thing three years ago (after years of trying to get a diagnosis of what was wrong). What has really helped me is yoga--particularly lengthening the back, to get away from a very scrunched-up position on the bike. I go to a special yoga for cyclists class and love it. Physiotherapy didn't help nearly as much, despite having a very good physio.
I was diagnosed with the same thing three years ago (after years of trying to get a diagnosis of what was wrong). What has really helped me is yoga--particularly lengthening the back, to get away from a very scrunched-up position on the bike. I go to a special yoga for cyclists class and love it. Physiotherapy didn't help nearly as much, despite having a very good physio.