Quote Originally Posted by mimitabby
how far are you biking? some of us find that the exercise GIVES us energy in the long run.

and it takes a while to build your strength up.
I agree with Tabby on this one....I am much more energetic, vibrant, dynamic, etc when I ride to work than when I drive (like today).

As far as building up your strength, that's just how it is. When I started increasing my distances on weekends, I found the bike commute became rather easy.