THERE IS NO MORE PRODUCTIVE FORM OF MUSCLE-POWERED TRAVEL THAN CYCLING. A 2012 article on popularmechanics.com cites the example of a cyclist versus a pedestrian, pointing out that if the two use the same amount of energy to travel a distance, the cyclist would travel three-times as fast, and would expend six-times less metabolic energy. Basically, riding our bikes is hella efficient, and in South Dakota’s two largest cities, there’s never been a better time to be on two wheels.