I was quick to put the blame on the Interferon, the knee pain
, but as Flycyclist pointed out, earlier in the thread; anyone (espesh my age, lol) could damage their knee cartalge, with a seat post too low, riding up hill on a bike!
I took a hot-tub, and then on to gentle exercise.
I have to remind myself, "easy does it". So many chores piled up during my Tx, but I need to give myself 6 months to completely recover.