Some studies suggest that combined supplementation with casein and whey offers the greatest muscular strength improvement . Carbohydrates are our main source of fuel, so how we time the ingestion of this “fuelling macro” is crucial. During the bulking phase, eat about 4-7 g/kg of body weight of carbohydrates per day, or g/day for a 68 kg (150 lb.) person . Focus your carbs before and after your workouts to fuel yourself for your lifting sessions, and restore your glycogen stores post-workout. When Heath, Kai Greene, and Branch Warren take the stage in Las Vegas, their bodies will glisten with the sheen of superhuman perfection.