Exercise is free and widely available.
Especially if one lives in rural New England and there's a whole lot of firewood (even if green, it burns) around.
This is what gets me about these "roughing it" primitives, the primitives who moved to Vermont or rural Oklahoma or rural Washington, with this notion that they would live life the "old" way, the way that used fewer resources.
And then these same primitives go out and buy electric wood-choppers, microwave ovens, electric mixers, washing machines, personal computers and the internet, cellular telephones, whatnot, as if Joe and Sadie in a sod house back in 1888 had such things too.
I dunno why these primitives aren't on the payroll at Disneyland or some other fantasy park.