[osi]

cycling is a close second. i used to live close enough to walk daily (~ 18min walk). i did it every day, through the chicago winters.

we moved slightly farther so it is closer to a ~ 30m walk, and now cycling is more efficient since it is closer to ~ 12m.

i agree that people vastly underestimate the value of this in their lives. (you have to experience it to know what you're missing)