i feel for ya mate i really do...
my dad had to retire early as he got riddled in arthritis, wich started in his thumbs im afriad

he now has a knee joint replacment, a hip joint replacment, his toes and shoulder are fused also.
but i'll tell you what, he's still active very active he 76 yrs old too

and he puts alot of young lazy kids today to shame!
so i would say you can take away a mans body but you cannot take away his constitution!
i trt to look after my body as i fear i may end up the same way, i take glucosomine sulphate pills (1 a day) for joint and conective tissue health and 1 strong multi vit and min tablet a day too
my advice would be do your own internet research and dont just take the docs word for it!
hope this as been some help mate!
all the best
GB