Doug Brignole is a highly regarded figure in the fitness industry and a former Mr. California, Mr. America, and Mr. Universe. Doug is also a lecturer, author, fitness TV show host, personal trainer and former gym owner. He has been certified by the American College of Sports Medicine and the American Council on Exercise. He has been involved in the fitness fields since he was 16 years old.
In his own words, he says that he is a bodybuilder on the outside and a science nerd on the inside. I've read an advanced copy of his biomechanics book, "The Physics of Fitness" that explains the physics of exercise and how one can assess which exercises are productive and which ones pose a risk of injury. My heartfelt endorsement joins the list of esteemed scholars, scientists, paleontologists, engineers and teachers endorsing his book.