When I get tired, I sit down, if possible. If I have to go somewhere, I lean on the walker and proceed on my way.
I'm not the robust man of my younger days. So what! I admit that I will turn 69 in a few weeks and have had a number of health problems. The FAA probably would not renew my second class medical certificate, so my flying days are basically over. It's called LIFE, a temporary condition before we face God & Eternity.
Try a little honesty and "transparency". Get a wheeled walker and, by the way, begin preparing to meet God, on His terms.