Water Safety Instructor (WSI) Practice Exam

In the power phase of the butterfly stroke, swimmers should pull their arms simultaneously towards their feet. This action is crucial as it creates the necessary propulsion and momentum needed to move forward effectively in the water. The simultaneous arm pull, which is often described as a key characteristic of the butterfly stroke, allows swimmers to harness their upper body strength efficiently, maximizing their speed during this phase.

This phase follows the catch and is typically characterized by a powerful downward motion with the arms, which helps in drawing the body upward towards the surface of the water. This upward motion is essential not only for advancing through the water but also for positioning the body correctly to prepare for the next breath.

While preparing for the next breath, performing a flutter kick, or transferring weight onto the back might be components of the stroke, they do not represent the core action aimed at generating forward propulsion during the power phase. Focusing solely on pulling the arms towards the feet ensures the swimmer maintains proper technique and performance in this critical part of the stroke.