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The eggbeater kick is a style of kicking where the swimmer's legs alternate one-legged breaststroke kicks. This form provides continuous support because there is no break in the kick.
Contents
The eggbeater kick allows the swimmer to freely use their hands, remain stable in the water without swaying, maintain a constant vertical position, and conserve energy. However, it can cause knee problems due to the circular rotation of the knee joint.
Applications
The eggbeater kick is used in several different types of swimming activities.
Sports
Lifesaving
Technique
In a schematized manner, a swimmer treading water using the eggbeater kick is:
- In a sitting position;
- has knees bent at almost 90 degrees;
- has legs a little wider than shoulder width;
- rotates the legs towards himself, in opposite timing, such as that the left leg moves clockwise, and the right counterclockwise.
Swimmers learning this stroke naturally use their hands to scull and tread water, as they attempt to achieve sufficient lift from the kick to remain afloat. The eggbeater kick can be seen as sculling with the legs, as it relies on the same fundamental physics.
Physics
The eggbeater kick propels swimmers in an upward direction. The swimmer rotates his or her legs circularly while keeping their feet arched and angled, causing water above their foot to move faster than the water under their foot. Due to Bernoulli's principle, the faster-moving water has a lower pressure than the slower-moving water. This difference in pressure between the moving water and the surrounding water creates a force, propelling the swimmer upwards. The faster the swimmer's feet move, the more upward propulsion he or she receives.