Well-meaning friends and family warned me of the pain and difficulties that follow a total knee replacement, and I took them to heart. Desiring to regain a functional knee, I committed to doing the physical therapy, to keep ahead of the pain with drugs, and to not push too much. Two hours after surgery, they had me strolling to the bathroom with a walker for support and balance. I would continue to rely on that walker. Until I didn’t. Just four to five days after my April 1 surgery, I pushed the walker ahead of me from my living room recliner to the kitchen sink, grabbed a travel cup to get water to hydrate, then moved to the spigot at the refrigerator.

Then, to my total and unplanned surprise, I noticed…