[noahc]

I don't see why it couldn't be done by almost anyone given that they live close enough to work. Anything less than 10 miles is doable assuming you have a good route.

[cr1895]

>almost anyone

I think that you considerably overestimate the capabilities of “almost anyone”

[bluGill]

Will power is a capability most people are lacking in, so I guess you are right. Most people have the physical ability, though few realize it.