Originally Posted by F1_Fan

Lower the seat in 5mm increments until the pain is lessened, tilt the seat slightly forward and spin rather than grind. I've been recovering from a herniated disc in my lower back. I know all about climbing with back pain.

Keep your hamstrings stretched. It wouldn't hurt to consult with a sports physio and/or sports doctor. I'm lucky... my sports doctor works for the Cdn. Nat. Cycling and Rowing teams. He's able to give me both medical advice and bike position advice.