Kinesiology 2241A/B Lecture Notes - Lecture 4: Front Crawl, Parasitic Drag, Butterfly Stroke

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2241A/B
• Professor: Thomas Richard Jenkyn

Document Summary

The purpose of this lab is to analyze different swimming strokes and techniques to see the effects that drag and lift has on the swimmer. These swim strokes include the head-up and head-down front crawl, as well as underwater and above water dolphin kick. In hydrodynamics compared to aerodynamics, water is much heavier than air, meaning the swimmer does not have to be moving fast for these forces to take effect. By orienting the body in different positions, the swimmer can increase or decrease the drag forces acting upon them, therefore affecting their time, perceived effort, and stroke length. 24: a) the average stroke frequency (strokes per time) for the head-up front crawl was 28 strokes/18. 6 seconds, or 1. 5 strokes per second. The average stroke length (strokes per distance) of the swimmer for the head-up front crawl was 28 strokes/25m, or 1. 12 strokes per meter.