In reality, building a screen-ready physique usually involves a highly structured combination of resistance training, carefully controlled nutrition, recovery, and professional supervision. Training Usually Starts With the Big LiftsActors trying to add muscle generally spend a large portion of their training time on resistance exercises that work multiple muscle groups at once. If the training never becomes more difficult, there is less reason for the body to keep adding muscle. The body generally needs extra energy to support muscle growth, so actors may eat more carbohydrates and healthy fats alongside their protein. The objective is to maintain the newly built muscle while reducing enough body fat for muscle definition to become more visible on camera.