Lower the bar to near the middle of the traps. By doing this, you place more load on the muscles of the lower body, including the thighs, buttocks and hips. Using these muscles will allow you to lift more weight. Whole grains and other fresh foods are essential to a weightlifter’s diet. Steer clear of foods that are boxed and pre-packaged, as these contain fillers, chemicals and preservatives that can cause disease and hamper your immune system. Eating healthy and nutritious foods helps to boost your immune system and increase muscle gain.