I literally sweat like a horse when I'm on the treadmill, even with the AC going. I'm talking absolutely wringing wet, like someone has doused me with a bucket of water. It's gross, but I kinda like it - I feel like it gets all the toxins out of me (although science says that's complete bunk). I do know if I skip exercise in the AM my body feels sorta clammy and nasty the whole day, so it must be doing something. I wish sweating directly equated to fat loss though, I'd be super skinny!

On the bike, I guess because of the breeze cycling creates, I'll sweat some in the same amount of time but not to the point of being drenched.