Earlier quoted context omitted.
36 is an old man? Are you being facetious?
I think 34/35 is when I began to notice actual age related differences - relatively small things like not being able to take it for granted that your sore back will be good tomorrow and I'd accrued enough general injuries over time that they were noticeable and compounding - sore/weak knee from a car accident, stiff shoulder from a motorcycle crash, etc. When you're 35, 35 feels pretty old compared to the personal st…
I don’t know your specific ailments or their causes but a lot of chronic pain and injuries can be resolved by working out lactic acid and knots with foam rolling, muscle scrapers and tennis balls. Look up on YT how to do these properly from physical therapists. I cured a knee injury that bothered me for over a year in about a week of exercises. Like magic. Same with an elbow injury.