Water Safety Instructor (WSI) Practice Exam

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Which strokes have a "glide" phase?

Front crawl and backstroke
Side stroke and elementary backstroke
Breaststroke only
Butterfly and front crawl

The correct answer is: Side stroke and elementary backstroke

The side stroke and elementary backstroke both incorporate a "glide" phase, which is a key characteristic of these strokes. The glide phase allows swimmers to maximize efficiency and streamline their movements through the water. In the side stroke, the glide happens as the swimmer extends one arm forward while the other arm rests at their side, allowing them to maintain a streamlined position. This phase is critical as it reduces drag and conserves energy during longer swims. Similarly, in elementary backstroke, the glide occurs after the arms sweep outward and then inward during the stroke's execution, allowing the swimmer to momentarily rest in a streamlined position with arms stretched out while the legs are together, providing a brief but efficient phase of movement. The other strokes listed in the remaining options do not feature a glide phase in the same manner, making the choice of side stroke and elementary backstroke the best fit for strokes that utilize gliding as part of their technique.