Health is measured by the population’s average at each age, rather than a comparison of the average of those who make it to a ripe old age in good to excellent condition, at this time and at each age. Because of this, I fear we have an opinion of health that is biased away from that which would help us age in the best condition possible.

If they would put up with it, I would love to have some lively and agile people answer a battery of questions as to what they eat and ate at each era in their lives, along with the kinds of activities they participate(d) in.

Granted that there are factors, such as pollution and good genes that would have to be considered (and are rather difficult to pinpoint).