This article describes how taking buses helps make people fit, since people usually end up walking to the bus stop. Walking to the bus stop can go a long way toward the recommended 30 min of exercise 5 days a week. Just as with cycling to and from work, walking to/from a bus stop to commute may appear to take somewhat longer. But one can kill the proverbial multiple birds with one stone. Of course, one can ride a bike to a bus stop if the transit system is set up to handle the transport of bicycles too.
1. Getting to/from work
2. Saving money on cars/gas/maintenance/insurance
3. Getting the needed exercise, avoiding spending time and money to go to a gym
4. Doing good to the environment
And all that takes place all at once! As Rep. Blumenauer (D-OR-3) asked rhetorically, how many people right now are driving a car to a gym in order to ride a stationary bicycle?