@dr-carriehardygmail-com hello Dr. Hardy!
Had a chance to ask this Q in passing to Doc Seeds. He says:
Hopefully they’re using incentive spirometer that works on improving respirator muscles. intercostal muscles, and expanding the diaphragm to improve lung capacity.
For people like this over time, they need to do more nose breathing, b/c it makes them work hard to get the air in but also it brings in more O2. If you’re having trouble getting Cerebrolysin, TB4 in high doses is another option.
30 Iu’s twice a day for 6 weeks. Keep me posted — Doc