Originally Posted by
yoder
Unless you have very serious hills, you can ride in a manner that you don't sweat much more than walking in the same heat.
That's a good point -- my alternative to biking is public transit, and on a hot summer day I'm likely to sweat as much in that sardine can (or more) than I am on the bike. when your alternative/standard of comfort is an air-conditioned car, though, people probably feel differently.