The anterior chain, which comprises the antagonists of the posterior chain, refers to the group of muscles that lies on the front of the human body. This includes the biceps, the pectoralis(chest) muscles, the abdominals, the obliques, the serratus anterior, and the quadriceps. Often, these muscles are not emphasized by power lifters who aim exclusively to increase their maximal strength in the squat, deadlift, and bench press, or by athletes who seek to increase physical performance, but rather by those who train to look good. This is because these muscles have the greatest visual effect, but are overall not as important for pure physical performance as the posterior chain. It is however, necessary to train both the anterior chain and the posterior chain.