Free Sample
The Complete Handbook of Swimming
For pools, coaches, facilities managers, and serious swimmers: how to understand, choose, and manage swimming effectively
by Alumigogo Books
Chapter 1: Understanding Swimming
Swimming is a method of human locomotion through water. That simple statement conceals a great deal of complexity. To understand swimming well enough to teach it, manage a program, train seriously, or maintain a facility, you need to grasp what actually happens when a human body moves through water—the physics, the physiology, and the technique that ties them together.
At its core, swimming involves four interdependent systems working together: the human body as a moving object in a fluid medium, the physics of drag and propulsion, the physiological demands that movement creates, and the learned patterns of movement (technique) that make propulsion possible. Each of these matters. Miss one, and you'll misunderstand why a swimmer struggles, why a facility operates the way it does, or why certain training methods work and others don't.
How Movement Through Water Actually Works
Water is approximately 800 times denser than air. This density creates two immediate consequences: drag and resistance become dominant forces, and the leverage available for propulsion changes fundamentally compared to movement on land.
When a swimmer moves through water, the body encounters drag—the force of resistance opposing forward motion. Drag exists in three forms. Form drag is the resistance created by the body's shape and size pushing through water. A streamlined body position reduces form drag by 20-30 percent compared to a upright position. Skin friction drag results from water flowing across the body's surface; a smooth, shaved surface can reduce this by 5-10 percent. Wave