One month

What you said mattered: carrying both children upstairs at once.

Sessions

Nine out of twelve. Week 3 was the school holiday.

What moved You wrote « stairs easier » twice, in week 1 and week 4. That is the only self-reported change, and it is the one connected to the thing you named.

What did not move, and was not supposed to Weight. It has not been measured, there is no scale in the house, and nothing in this month was built to change it.

What the month actually established That sessions with no external dependency hold at about 90 percent, and sessions that depend on someone else's schedule hold at about 30. That is a useful thing to know for month two, and it is not a motivation problem.