Bit of a difference between overall health and sword-swinging fitness. I may be almost completely disease- and parasite-free, but the guy that's been training five hours a day since he was five will always lift more than me and run further than me.
Does “overall health” mean being disease- and parasite-free, though? There's at least one disease I heard of from which the case may actually benefit with increased lifespan[0]. That said, I tend to agree that to equate fitness with health probably isn't correct either.
