The serratus anterior is the muscle that offered attractive appearance on the side of the upper abdominal area, sometimes referred to as the "muscle Boxer"; technically not an abdominal muscle, but causes the eyes focus on him, distinguishing a muscular torso tearing others. The problem is that it is a bit difficult to train directly; in fact, many say that to have a fabulous serratus anterior only must have a very low rate of body fat and work with other exercises for chest, torso, and upper limbs, which brings into play the previous serratus.
Not bad advice, but work to go training the serratus should be directed to this muscle group; the last serratus muscles is important not only because it can look great with the sculpted body in the summer or at the gym, or on stage for athletes. The functionality of the previous serratus is given on the activity of the scapula, however, while most think that this muscle is key to carrying out a routine as "pullover," there are several exercises to strengthen and provide the ideal shock to stimulate the previous serratus.
It is quite clear that when it contracts (widens at the sides) extends the scapula, so long as the arm moves forward or backward, this muscle will skyrocket. Likewise, when pulling movements are made, the scapula retracts and often acts to stabilize, controlling the movements of the arm; therefore, it is difficult to find a perfect day to train the previous serratus.
Besides all this, when the previous serratus is weak, you can suffer from postural problems, including the "famous" winged scapula (shoulder blade where flared back, away from the body is). So regardless of how perfect the physical, to go by training the serratus as another circuit it is likely to be achieved fabulous results in the process of muscle definition and formation of a body ten. You can know more details here.
If not a sweater, then what?
We are not discrediting or suggesting that a good workout jersey not gets an absolute work of serratus during his movements; we are just examining the anatomical activity and scientific research analyzing alternative exercises to go by training the previous serratus.
The following exercises to strengthen the former serratus are perfect to improve posture, whether the days of chest or added to train shoulders, with a few changes to the pulling cable, but to make a retracting movement of the shoulder blades (like taking the pectoral outward) with a look back and the bent back, can develop the training on day upper back to balance and enhance things with activators of the scapula.