@burialchoice Longevity is also a pet interest of mine. Here's what I believe based on my reading....
Walk a lot. Wear good running shoes, replace when recommended (it's expensive, but cheaper than new knees). Be prepared to quit running and switch to a lower impact sport before your doctor tells you to.
Lift weights or do other upper body training (your back, shoulders and wrists will all thank you). Take time to learn proper form, cause nothing ages you faster than injury. Strength training decreases mortality from all causes, including cancer.
mobility is also a real good idea, as is building habits of regular movement. Fidget, get up often, don't be a potato.
Eat right, eat s l o w e r, keep your teeth clean, sleep a lot, don't smoke, wear sunscreen.