Hugging Tree update

I have done about 3 sessions of 40 minute hugging tree standing exercise.
This latest today morning at 5:34am to 6:16am
did not feel the pain I had felt on the previous session.

The previous session, the pain came at 15 minutes and gone at 28 minutes.
Also very painful for 2 to 5 minutes at end of session, as I put down my arms.

At around 4pm, felt sleepy, stood up in hugging tree posture / standing
for 1 minute, and I woke up.

I can do the "inner circle hand' walking for 120 steps, 2 rounds, and then 40 steps
on the 3rd round.