How do you build muscle mass quickly? This is how famous bodybuilders such as Arnold Schwarzenegger, Lee Priest and Jay Cutler do it. They all started competing when they were teenagers. Bodybuilders seek out low-glycemic polysaccharides and other slowly-digesting carbohydrates, which release energy in a more stable fashion than high-glycemic sugars and starches. Bodybuilders exist on a diet of protein to develop muscle, and have a skinny supermodel's aversion to fat. Bodybuilders split their food intake for the day into 5 to 7 meals of roughly equal nutritional content and attempt to eat at regular intervals (normally between 2 and 3 hours). Aspiring bodybuilders therefore should design their training programs to allow time for recovery and growth. Bodybuilders perform a lot of isolation movements, or exercises that work only one muscle or group of muscles at a time.