I think it’s fair to say the new exercises have used some muscles I haven’t used for a while. I managed to do the exercises ok this morning, and have been walking around the house without my stick today. The combination of that and doing a certain amount of “normal” activity (on the computer for example) led to a significantly increased amount of pain later in the day. I doubt the fact that, having taken my midday pain relief over an hour late, I then forgot to take my late afternoon ones completely.