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Basic math says that if the four secrets to looking flawless in your underwear under bright lights are superhuman genetics, serious restraint when faced with fries, a really good self-tanner andlots of hours clocked at the gym—and the only one out of your control is your DNA makeup—then you have a 75 percent chance of becoming an Angel. So, what are you waiting for? We asked the top trainers behind the most enviable bodies in the world to share what makes their workouts so transformative.