Nope, didn't even know this was a thing! That's why the passage I quoted rings so true to me. I lead a sedentary life all year and then one day, with no prepa

Nope, didn't even know this was a thing! That's why the passage I quoted rings so true to me. I lead a sedentary life all year and then one day, with no preparation whatsoever, dive headlong into strenuous exercise in adverse conditions for an hour plus.