Making it better. 

 - Videocassette (VHS)(ca. 20 min.) :sd., col., 1/2 in. 
<br/><br/> Shows the forces acting in the human body in water-buoyancy, gravity, resistance and propulsion-and their effects on both the beginner and the competitive swimmer. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biomechanics.<br/>Swimming.