I do like to use that reasoning now and then on anyone who asks (no one does). I get up in the morning and do about 40 minutes of bike riding for exercise, and suddenly I find myself at work. It's a little exercise at other ways of looking at things.

Similarly, it's more time-efficient to ride to work. If I drove, it would take around half an hour (best case) round trip. On a bike it takes around an hour and a half round trip. But, if I drove, then I would, at some point, have to change clothes and make some arrangement to exercise, like go jogging or drive to the gym to ride a stationary bike, for a total time of around an hour. So by driving I get at most an hour of exercise and have to spend half an hour in an unproductive activity. If I ride, I spend the same amount of time, but get an hour and a half of exercise. Why would anyone in his/her right mind NOT ride a bike to work, if possible.