While socio-economic status, level of education and genetic predisposition can most certainly influence health markers, they are not necessarily determinative of them.
Hence, using key metrics of both lifespan and healthspan, such as VO2max and grip strength, can offer profound insight as to precisely what a human's history of dietary inputs and exercise frequency and intensity, has been.
Notably, VO2max sheds light on one's respiratory capacity, in terms of their maximum oxygen consumption rate during physical exertion.
Dead hang time at or above 120 seconds not only describes one's grip strength, but is also a surrogate for what one has had to do from the standpoint of sustained resistance training over time, to achieve said grip strength.
While it may not be surprising to understand that nutritional inputs and exercise are primary determinates of one's health, they are often times critically absent, or insufficient, in many individuals' self-care regimens.
The great news however, is that they are available to just about anyone, immaterial of age, state of health, or lifestyle, and as such, can dramatically alter one's lifespan and healthspan profile.