Swimming is hard. Physically exhausting. In an Ironman triathlon, you have a 112-mile bike and a 2.4-mile swim. That should give you an idea of the difficulty. But don't mistake effort for mindless work. We have a narrow view of what swimming is and how to include it in our workouts. For most, it's lap after lap of drudgery. Maybe it's time to update our ideas on swimming as an open adventure, as a way to play Aquaman, even as a recovery tool.