Is there any good reason for a marathon swimmer to train strokes other than freestyle?
It’s fairly uncontroversial, I think, that training in multiple strokes makes one a better athlete, in a general sense. Each stroke works a unique set of muscles, giving swimmers more “balanced” power in the water. Eddie Reese (multi-time U.S. Olympic coach) is well-known for promoting IM training for all swimmers, including sprinters and single-stroke specialists. Multi-stroke training is also less likely to lead to over-use injuries.
Think of it as in-water cross-training.
What about open-water and marathon swimming? Or triathlon? Is there any point to training other strokes when you’ll never race anything but freestyle? If (like most working adults) you have limited time to train, isn’t that precious time best spent optimizing your freestyle? …