I’m 76. Soon to be 77. I went through pulmonary rehab to be sure I could do what you have written about. And yes I can. I agree with your summary but I do this only on Tuesday Thursday and Saturday. I do rest regularly. Monitor pulse ox heart rate I agree on the electrolytes too ( when I remember to use them). They help a lot. Also: do not rush or hurry through exercise I concentrate on the movement and doing it correctly and the pulmonary rehab taught me how to breathe during the various exercises. PMR still there but we can let it stop us. Thx