This is all very interesting, KSH I agree, it must be a real pain to have to deal with him acting this way. It brings to mind my stepfather, who is now 80 and failing fast.
He had an early retirement, he was about 60 when his oil company laid off about 60% of their employees, including him and his group of 90.
He was young, vibrant, handsome and active when he was 60. He decided when he retired that from then on he wasn't going to have to do ANYTHING anymore. (like yardwork, hiking, exercising) because you know, he was retired now.
So he sat down in his chair and watched TV. He moved from a house with a big yard to a house with a little yard so he would have less to do.
My mother, on the other hand, no athlete, made no such choice. She joined a gym, works in the yard (and of course does all the house work).
many times over the years doctors have suggested exercise, therapy to strengthen his limbs, improve his muscle tone, lower his blood pressure and
to consume some of the calories that instead go right into his blood and are slowly poisoning him with diabetes.


Now he's go no muscle left on his legs, he's diabetic,
has high blood pressure, his bones are a mess.

He has taught us the most awful life lesson. STAY active.