People in Blue Zones are usually far more active in day to day menial tasks as well. Walking to a market to get fresh produce, going up a bunch of steps, tending to a garden. These things add up over time.
Not replacement for exercise and maybe not what the thread has mostly been about, but curves isn't wrong about the value of that.
The amount of people who sit at a desk all day and then come home and sit on the sofa all evening has contributed to declining fitness in modern society.
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