On: Cardio fitness is a strong, consistent predictor o...

[Jimmc414]

n=1, but I can personally attest to going from average sedentary 29 year old to marathon running shape in roughly 3 weeks of continuous hiking 8 to 10 hours a day in the Appalachian mountains with a pack that was about 35% of my body weight.

[TylerE → Jimmc414]

I have a hard time believing that a truly sedentary person could do that.