“Tired” knees is a very apt description. It’s pretty much the major issue I had at the beginning of my PN: they were so “tired” they kept buckling & collapsing to where they were too weak to keep me upright. Something about this sudden PN disconnecting the signals between the nerves and muscles and I had to learn to stand again with a lot of PT which took 6 months to get out of the wheelchair. Then I learned to waddle/walk using pretty much muscles alone. This is why continued PT is important to me, so I do my best to try not to let my knee (or ankle) muscles get too weak. My legs tire very easy as a result, and it’s hard to stop doing things when my heart and lungs are capable of doing much more. But over exertion of my legs (which doesn’t take much) leads to extended soreness and days of recovery time, so I try hard to know my limits and not be afraid to sit down. I figure it has to be quality over quantity of steps, so I try not to waste too many steps and pick my daily activities wisely. I hope everyone has a good holiday season, and here’s to putting our best feet forward in 2024!