When evaluating your body, consider both composition and weight.Nitric Muscle Fuel Consume healthy fats when you are trying to build muscle. Foods, like nuts and avocados, can increase the motion in joints and raise testosterone levels. This can increase the speed with which you gain muscle. Saturated fats should be avoided, as they are unhealthy, and especially bad for your heart.Nitric Muscle Fuel Keep doing your cardio workouts. Cardiovascular workouts are an important part of keeping your heart healthy.