beezaur

I saw a massage therapist about my knees recently, and mentioned that I was having back pain after lowering the handlebar on one of my bikes.

She showed me how to massage (and stretch) some muscles that run just inside my pelvis (iliac crest). They get tight and pull on my back, making it sore.

When I would start getting a sore back (and I mean bad!) I would stop and do my various stretches. The pain was alleviated for a few miles at first and then gradually longer. Now my back rarely hurts.

It might be worth looking into. Massage therapy isn't that expensive.