Guess its trange I should respond.. well we all need to help each other..
high RESP.. small lungs.. will take time to develop. or he has lung damage.
Try DMG it improves the abiltiy to carry O2. I have some papers from VITA
FLEX people and other articles its called B15 in Russia. They use it for
humans. I use it in the summer and when I have to start running again..like
getting ready for the od50..
IT really DOES help to improve the breathing.
Of course the problem may be HEAT load rather then O2 debt.
The flex products are for joints only, the ABC Plus is for digestion.
May want to have a blood test done ..check the RBC and Hemocrat ?
MY best guess, is more work and DMG will fix the problem.
Good luck
Roger R