Hi guys, got a question. I'm a serious exerciser, so what I'm thinking of would be in addition to the workouts I already do. You know how they recommend you get additional exercise in increments every day, like parking further from the store and taking the stairs instead of the elevator, etc? I do all this but on foot--i.e., in addition to my exercise sessions, I also try to walk when I run errands. But the weather is so glorious this week I was thinking about getting a bike. If I casually biked to run my errands--and that would mean at a pretty slow pace with a lot of stopping--would that add anything to the scheduled exercise I get--or would it just be taking away from the walking? In other words, does casual, stop-and-start, slow biking contribute ANYTHING, or would I be better off walking?

Thanks!