The line on the back of fitness is called spinal sulcus. The sulcus formed by the spine and the skin on both sides is the sexy and invincible spinal sulcus. The spine is also the spine, which is the pillar of our body and located in the middle of our back. The long spinal groove hidden behind the woman not only makes our figure look slender and stylish in the sling, but also full of charm. The most intriguing sexiness has always been beyond vision, and it has become internal and external.

Extended data:

The perfect spinal sulcus lies in our equally perfect back skin and shape. If you want to have an enviable back, it is essential to deeply exfoliate your back once a week. It only takes 10 minutes to do back stretching every day, which can not only make the back no longer tight, but also increase the tightness of the back muscles.

Spine, a modern word, is composed of 33 vertebrae (7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 9 sacrum and coccyx) connected by ligaments, joints and intervertebral discs. The upper end of the spine supports the skull, the lower part is connected with the hip bone, and the middle part is attached with ribs, which serve as the back wall of the thorax, abdominal cavity and pelvic cavity. The spine has the functions of supporting trunk, protecting internal organs, protecting spinal cord and exercising. A longitudinal spinal canal with a spinal cord is formed in the spine from top to bottom.

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