When you?re pushing and you?re pedaling for like two hours straight, it really helps your wind and your endurance, ... And you might not think about it, but you get a good upper body workout, too, because you?re just holding yourself up the whole time you?re pedaling. A lot of people who don?t ride bikes regularly, when they get off, their upper body is sore. They?re not used to holding themselves up for that long of a period of time. Reggie Brown