Detailed explanation of back muscles and the benefits of exercising back muscles!

Detailed explanation of back muscles and the benefits of trying to exercise back muscles!

　　　Understanding back muscle groups

　　Back muscle groups are not the largest and strongest parts of the body. It is composed of a series of complex and interconnected muscle groups. Before talking about training movements, it is necessary to first understand the muscles we want to train and their functions.

　　Main back muscles include:

　　Latissimus dorsi: The main function of latissimus dorsi is to stretch, adduct, and revolve the shoulders. In all pulling movements, latissimus dorsi will participate, whether it is horizontal pulling movements (such as rowing) or vertical pulling movements (such as pulling up movements ). Vertical pulling movements stimulate the latissimus dorsi more intensely.

Trapezoidalis: This diamond-shaped muscle is very interesting. Its muscle fibers have several different directions. It can make several different movements depending on the recruited muscle fibers. The most common trapezoidal training movements in the gym are all aimed at the upper part, and the main function of the upper part is to lift the scapula and clavicle. The main training movements are various shruggings. The smaller levator scapula can also help lift the scapula. The function of the middle trapezoidalis is to retract the scapula (together with the rhombus muscle). All muscle fibers contract at the same time, which can also help the scapula retract. Finally, the slope The function of the lower part of the muscle is to press down the scapula (pulling the scapula downward).

　　Teres major: the shoulder joint is rotated, the shoulder joint is adducted, and the shoulder joint is protruded (in the movement without resistance, it does not show electrical activity, but when doing resistance movements, it is the primary muscle). Since the effect of this muscle on the arm is very similar to the lats dorsi, it is called "little assistant of the lats dorsi

　　Rhombus muscle: the rhombus muscle is a deep muscle group located between the scapula. The main function is to retract or retract the scapula (pulling the scapula backward). In vertical and horizontal pulling movements, the rhombus muscles will actively participate. Rowing in the horizontal direction is to retract the rhombus The muscle stimulation is greater because the scapula retraction is larger.

Infraspinatus muscle: located in the infraspinatus fossa, part of the infraspinatus muscle is covered by the deltoid muscle and trapezoid muscle. It starts from the infraspinatus fossa, and the muscle bundle is outwardly behind the shoulder joint and ends in the middle of the large humeral tubercle. Its function is to rotate the shoulder joint extraverted.

Erection spinal muscle: also known as the sacrospinatus muscle, including the iliac curs muscle, the longest muscle, and the spinal muscle, is the main muscle responsible for stretching the trunk (making the back of the trunk close to the back of the legs). In deadlifts and goats standing up, the erection spinal muscle will actively participate."

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