The first muscle refers to the piece between the legs, because when exercising the first muscle of humerus, congestion can achieve the purpose of exercise, and the dimension of this "first muscle" after congestion can also be multiplied to form a sense of muscle. In the fitness circle, the first muscle of humerus often refers to the first muscle of humerus, the upper arm between biceps brachii and triceps brachii, and its position is relatively hidden.

Brief introduction of muscle trunk

A muscle infarction, some obese people want to exercise abdominal muscles, but they can't exercise an abdominal muscle. This is called muscle. Abdominal muscles are an important part of human connective tissue, including rectus abdominis, oblique abdominis, oblique abdominis and transverse abdominis. When they contract, they can bend and rotate the trunk to prevent the pelvis from leaning forward.

Abdominal muscles also play an important role in the movement and stability of lumbar spine, and can also control the movement of pelvis and spine. Abdominal muscle weakness may lead to pelvic forward tilt, increase the physiological curvature of lumbar spine and increase the probability of low back pain.

The quadriceps femoris is located below the biceps and belongs to the hidden part. There are musculocutaneous nerve and radial nerve here, and this area has a series of double innervation. If you can make your body look better through deep exercise, you will also see more vitality.

Most men exercise this part of the first muscle, while women seldom exercise the first muscle. There is a muscle in the upper part of the scapula, which is thick and bulging. Finally, it will combine with the valley floor to form a muscular abdomen, and the lower part will extend to the lower end of the humerus. Tendons gradually formed and stopped at the radial trochanter.