I remember hanging out at my great grandpas place and grandfather as well. Eggs bacon and biscuits for an early breakfast that the grandmas were proud to make. They did coal mine work and when they retired they still walked up the hills to the fishing ponds hidden in those east Tennessee mountains. They did not know how to sit down for long.
The real root cause…..The US has moved from an economy based on manufacturing to service. People now are sedentary as compared to constantly moving.