Eric, I too am battered. Long list including a parachute malfunction.
my challenge is not while moving on any particular day it's the cumulative impact of poor sleep. With neck and back pain I rarely sleep well even in my bed at home. This leads at times to days where I am functioning at a very sub par level leading to the potential of more injuries.
I would strongly urge section hiking so you can keep a close eye on your health and keep the self imposed drive to complete the hike in check.
enjoy retirement!