Large pectoralis muscle. Function of large pectoralis muscle

The human body consists of a multitude of muscles, the weight of which is about 42% of the total mass. Their form depends on what they have a working function and where they are located on the skeleton. By the blood vessels muscles enter the nutrients, oxygen is delivered. Due to the ability to contract, they form the elastic tissue of the entire human body, which has increased elasticity.

The intensity of physical activity depends on the muscular strength of different muscle groups, the total number of which is more than 400. Strength exercises are able to change the shape and even function of muscles, contributing to their increase in volume and thickening. However, this process does not happen so quickly.

Anatomy of pectoral muscles

The history of mankind counts thousands of years. Throughout the time, a symbol of courage is a perfectly formed chest. A large amount of muscle during exercise consumes a large number of calories. Therefore, pumping muscles, you burn excess fat.

So, to the pectoral muscles are: superficial, which go from the ribs to the shoulder and the upper limbs, and deep, the location of which are the ribs. With their help, the respiratory process is carried out.

Superficial muscles:

• The large pectoral muscle is able to rotate the shoulder inward, expand the thorax and perform the function of the auxiliary inspiratory muscle.
• The small pectoralis muscle is responsible for pulling the scapula up and down, lifting the ribs, and assisting with inspiration.
• The anterior dentate muscle pulls the scapula from the spine.

Deep muscles:

• External intercostal lift the ribs, thereby expanding the chest. These are the main muscles of inspiration.
• Internal intercostals perform the lowering of the ribs. These are the main muscles in exhalation.
• The diaphragm is the main respiratory muscle. Cutting, it flattenes, promotes inhalation.

To pectoral muscles, photos of which are presented in the article, looked attractive, they need to be trained. To inflate the muscles, there are many exercises.

Large pectoralis muscle

It is located on the surface of the chest, in its anterior part. It covers all the upper ribs. The function of the large pectoral muscle is to form the front walls of the armpit. In form it resembles a fan, consists of muscle fibers, which are assembled in bundles, there are only three of them: the clavicle, the sternum-rib and the abdominal. All of them are connected on the tubercle of the shoulder.

The main function of the large pectoral muscle is the ability to bring the shoulder to the torso and turn the hand inside, that is, to sponge. In addition, it is an auxiliary inspiratory muscle, thereby causing the chest to expand . The large pectoral muscle occupies the entire space from the clavicle to the anterior surface of the sternum, originating from the crest of the large tubercle of the humerus. The arteries and acromial process of the thorax correspond to the blood supply of the large pectoral muscle.

From the shape of the large pectoral muscle, the appearance of the upper part of the trunk, namely, its anterior surface, depends. The peculiarity of the structure of this muscle lies in the arrangement of the lower fiber bundles: they are located below and behind in relation to the upper and middle bundles, attached to the bones of the shoulder above the upper ones. Thanks to this structure, uniform stretching and unwinding of all muscle fiber bundles occurs. This is well expressed when a person raises his hands.

Small pectoralis muscle

It is located under the large muscle of the breast, originating from 2-5 ribs and reaching the appendage of the scapula-shaped scapula, to which it is attached. It has a fan shape and performs functions similar to the large pectoral muscle. But its main role is to move the scapula forward and downward and rotate it at a lower angle to the spine. If the shoulder blade is fixed, the muscle will lift the ribs and promote the expansion of the breast cage during inspiration.

Workout Features

To stimulate the growth of pectoral muscles, it is not necessary to engage in their pumping at each workout. The fact is that if you constantly overload the pectoral muscles, you can not expect good results. For training it is enough to allocate twice a week and perform 4-8 approaches, and beginners 2-3. To increase the mass of the breast, 10-12 repetitions are enough. The chest is gaining strength if the number of repetitions is 6-8 times.

Exercises for training the muscles of the lower chest

The press with dumbbells, lying on the back. For the exercise, prepare the dumbbells. The lower part of the pectoral muscles is well developed during the next exercise. It is necessary to lie down on the bench for the press (it has a backward sloping function). Then squeeze and simultaneously lower both dumbbells. If you train for the first time, inventory should be small.

Specificity of the exercise is such that the posture during the performance of the bench will seem unusual (especially for beginners), dumbbells can at first fall back. Do not let this frighten you, in due course adapt and will work with dumbbells exactly. When performing the exercise, extend the elbows so that they are on both sides of the torso.

The lower part of the pectoral muscles is pumped up while performing the exercise on the uneven bars. More often use demountable implements. Periodicity of classes should be at least 2-3 times a week. To complicate the exercise, you can stop the lower part of the squeeze for 2-3 seconds. Do 3-4 approaches 15 times each.

The upper part of the chest muscles: Exercises

This is the most problematic area. To inflate the muscles you need a special inventory, without it all efforts are in vain. But if you systematically perform one exercise, even if you do not have the opportunity to attend the training hall, you can get good results. It's push-ups from the floor when your legs are above your head. Exercise with success can be done at home.

Very quickly, the upper part of the pectoral muscles will acquire a relief shape, if you complicate the load, only gradually. This can be done with the help of short pauses at the lowest point of spinning or using some objects. You can put two stacks of books on the floor of the same height, so that the distance between them is wider than the shoulders, and slowly press. Hands should rest against piles, and breasts touch the floor. It is necessary to perform 15-20 push-ups in 3-4 approaches.

To inflate the upper part of the pectoral muscles, the so-called pushup explosive helps well, when during the extension of the hands it is necessary to tear them from the floor in order to make cotton.

The most difficult is to combine the techniques of previous exercises. But first you need to master them and learn how to easily perform.

Muscle training using a barbell

Exercise on the bench at a slope of no more than 30 degrees using a bar is considered most effective if the goal is to work out the muscles of the chest mass. You need to lie down on the bench and raise your legs, making emphasis, but so that there is no bridge.

In this position, the back is pressed tightly against the bench. You need to grasp the bar more than your shoulders. In this exercise, it is very important not to touch the chest with the neck of the bar at the bottom point, and in the upper one - do not straighten the hands to the end.

Increasing the mass of the muscles of the breast

Exercise can be done at home. To do this you will need a dumbbell. You need to lie with your back on the bench without tilting, raise dumbbells above yourself, without bending your hands, palms to each other. Then lower the dumbbells in different directions. Try to do this as low as possible, and you will feel how your muscles are stretched out.

To elbow joints do not experience a great load, they can be slightly bent. Then raise the dumbbells up again with the feeling that you want someone to hug someone. The pectoral muscles will contract.

Broad chest muscles

In the back of the chest, at the bottom, is the widest back muscle, which completely covers it. It originates from six thoracic lower processes, often called "wide pectoral muscles".

Some muscle fibers originate from the angle of the scapula. In the lower part they are collected and sent to the armpit, without losing contact with the round muscle. This forms the back wall of the armpit. Then the fibers of the latissimus, passing a certain path, form tendons.