Can’t keep saying this enough:
More muscle strength (muscle mass as proxy)
+
Increase in VO2 Max
=
Longer life and health span
Discussion
What’s VO2 Max?
Maximum rate of oxygen you are able to consume during peak physical exertion. Measured in milliliters of oxygen consumed in a minute per kilogram of body weight.
If you can run 2 miles in 12 minutes, that puts you at a VO2 Max of around 60.