“Freestyle Biomechanics: The Science Behind The Strokes,” a book by former University of Hawaii swimming coach Jan Prins, is now available via Amazon.

The book focuses on freestyle, but also touches on “the three other competitive strokes,” said Prins, who earned a doctorate in kinesiology at Indiana in 1978 and still teaches at UH. “(It) covers … every freestyle movement from stroke pattern, body position, flutter kick, hand entry to recovery and much more.”

It is the culmination of nearly 50 years of coaching, presentations, research and video workshops Prins has conducted for competitive swimmers and coaches.

“It will become a continuous shelf reference for all swimmers, especially triathletes and adults,” said Garry Rodrigues, swim consultant to USA Triathlon for the 2028 Olympics.