I knew I had a leg length discrepancy where my left leg was slightly longer. When I purchased my last bike I had a fitting done and the fitter used wedges and a stack under the right cleat to even me out in the saddle. Now here's where it gets interesting. Last June I had surgery to repair a malunion of a pelvic fracture which required a revision of a hip replacement. Recovery was slow and although back on the bike I was still having issues and attributed it to the surgery and the recovery process.
Last week I went to my internist for my annual physical. During the exam he mentioned I had a leg length discrepancy but the only thing is now the right leg is longer. The doc said that this sometimes happens with this surgery and up to half an inch is considered acceptable. So that along with the stack under the right cleat it was really throwing things out of alignment. I switched the stack to the left shoe and it has made a huge difference. I can't believe this whole turn of events but I'm putting out more power and feeling better on the bike than I have since the surgery.
Strange but true.