I just took a shot of B vitamins to help with the anemia. As we get older recovery can take longer but we can also train smarter and eat healthier avoid alcohol and partying get plenty of sleep and reduce our stress. It all adds up. Perhaps we make gains perhaps we only slow the decline perhaps we only half ass it but we are still always lapping the people on the couch.
You have multiple health issues in common with my gran who is in her 80s
Well she doesn't bleed out of her ass..
Anyway make sure you supplement folic acid, magnesium and eat iron rich food otherwise the B vitamins shots aren't as effective. Also the shot leeches potassium from your body, so be careful with that and eat a lot of bananas. I'm assuming your doctor didn't tell you this stuff.