I thought I had missed the exercise at the beginning, so I re-read your story twice more and did not find it. All I found was "a suggestion to raise my hand for 5 minutes" But nothing about clapping my hands. I hope I haven't offended you by pointing out this omission. If I have I will stop pointing them out in the future.
The body has the greatest attachment to memory. I find my body will remember actions/habits/ memories associated with movement. And I have a hard time letting go of the attachments.