The PT says my range of motion on the left arm has improved a lot since we started three weeks ago. Some motion has improved 14 degrees, some 21 degrees, and some other 25 degrees. One has improved 5 degrees but it was already almost perfect anyway.
So that's good. The main thing is, I think we started only a week after I noticed the stiffness. She said I should now increase my duration for each motion to 30 seconds.