Stationary Bike 20:00 
Today visited Doc Marks. Wrist and (to my surprise) right knee appear to be arthritis - got xrays and will consult with sports doc soon. If that's true, then the pain is just pain, not a breakdown or something i can worsen, but i won't ramp up until the sports referral.
Also scheduled a echocardiogram to check on my lack of vigor/out of breath/slow recovery. Overall, she talked about lowering my expectations and dealing with aging, though in a friendly and a bit obtuse way.
Later: phone message says no arthritis, and that i need PT. i'll ask the sports doc monday