Precisely, I either bike or bus to work every day. If I take the bus I do some other form of exercise instead. And I certainly don't eat less on the days I ride

Precisely, I either bike or bus to work every day. If I take the bus I do some other form of exercise instead. And I certainly don't eat less on the days I ride the bus. I would imagine most people that get around by bike maintain a steady level of exercise during times when they are biking less. Whether or not the author's intent was to discourage biking and encourage driving they have done exactly that.