With regards to the hand shaking thing, 'These Days' is one of the few potentially painful songs to play if you don't play the guitar that often.
It doesn't so much hurt your fingers but having to make a full barre chord shape and play the verse chords in that position with the pressure required for all the notes to ring clearly absolutely kills the wrist. When I haven't played it in a while, it's the one song which causes a few aches.
I can't think it's anything other than that tbh.
