I tried an experiment today, that I think I will try again tomorrow to see if I get the same (or similar) results.
After morning chores, and before having him start his lessons, I had #2 do my Pilates tape. 30 minutes of Pilates resulted in #2 actually being able to sit and focus on his school work for the day. I was shocked, amazed and delighted.
I'm definitely giving it another go tomorrow.