@Sister I did moderately fast walking for over 5kms each time for three days in row this week. Normally this would be nothing for me, but halfway through the third one I knew I had waaay over-extended myself. I was wrecked for the rest of the day. It was suggested to me to do day on day off. The anaesthetist says moderate intensity exercise will help with recovery from the operation so I will persist for the next six days anyway, in moderation! I'm really looking forward to my oncology exercise rehab programme in June.