Elliot A. picked up cycling in the past year, and like a lot of good habits, it went from a casual interest to a real part of his life fast. But cycling asks something specific of the body. You spend hours folded forward over the handlebars, and for someone managing lower back pain, that hunched position turns every ride into a negotiation. "Am I out here for 30 minutes, or can I be out here for three hours?" That was the question Elliot carried onto every ride. Not "where do