The robots are called “butterfly bots,” because their swimming motion resembles the way a person’s arms move when they are swimming the butterfly stroke.

A soft robot propelled by a butterfly-stroke-like motion achieves a speed and efficiency similar to those of swimming animals 1. Soft swimming robots could have applications ranging from ocean ...

5. Butterfly The combination of strength and coordination required to pull off the butterfly makes it the hardest swimming stroke. Some people, including many triathletes, never learn it, Lucero says.

The individual medley (IM) requires competitors to use each stroke for one-fourth of the race, following this sequence: butterfly, then backstroke, then breaststroke, then freestyle. There are two IM ...

Think your butterfly stroke is good? Try paddling against the wind in a feather coat.

Finding balance in each stroke will help perfect the motion for all strokes; and for butterfly and breaststroke, it will help the timing for breathing.

Think your butterfly stroke is good? Try paddling against the wind in a feather coat.