The human spine is a strong structure formed by intervertebral discs connected to the vertebral body, supported by strong muscles and ligaments. If we sit in a forward-flexed position for too long, it will cause these muscles and ligaments to relax and lengthen, which in turn will cause fatigue and pain in the lumbar muscles, and in serious cases, it will also lead to pain in the muscles of the back and neck. If the waist is in a forward-flexed position for a long time, so that the lumbar disc is subjected to excessive pressure, it is easy to lead to the metamorphosis of the lumbar intervertebral disc and thus the emergence of lumbar disc herniation. According to biomechanical research, the fatigue disappears and the muscles return to their normal state in 7 hours, so it is important to maintain a correct sitting posture and good sitting and standing habits. Many people like to rest or work under the waist pad a pillow or cushion and other items, that rest or sitting more comfortable, especially some work nature to sedentary people. If the pillow under the waist, can fill the space between your waist and seat, to maintain the normal physiological curvature of the waist (physiological convexity), to ensure that you have a healthy, correct sitting posture, thereby preventing muscle fatigue due to prolonged sitting and standing and the pain caused by the waist back and neck and shoulders. When choosing a lumbar pillow, there are two factors to consider: 1, your work posture: If you work, the waist to often keep the convexity, then, choose a pillow cushion to choose a thicker cushion pillow, such as company employees, IT professionals, they need to bend forward in front of the computer for a long time to sit in the chair, then, be sure to choose “thick “some cushion pillow, thus helping to increase the lumbar convexity; conversely, if the work posture to make the lumbar spine physiological convexity is reduced, then choose some thin cushion pillow, such as drivers, long-term driving to keep the waist and back straight, then, should choose “thin” some cushion pillow to properly maintain Lumbar convexity; 2, your seat: If you often use the seat can make you “completely sit” inside, then, the general cushion pillow is difficult to play a good support for the lumbar, so you should choose a thicker support pillow. Whether thin or thick cushion pillow, are to maintain the lumbar spine physiological convexity, so, “thick” and “thin” is a relative concept. Because each individual is different, so, when choosing a cushion pillow should also pay attention to: 1, repeatedly test different sizes and shapes of cushion pillow, until you feel satisfied; 2, at work and at home to prepare different cushion pillow, so as to meet the needs of different places; 3, the beginning can use a towel rolled up, rolled into different sizes and elasticity, if you try to use satisfied, you can buy a standard cushion pillow according to this specification pillow. At present, the market has many kinds of cushion pillows to choose from: 1, D-shaped cushion pillow: this cushion pillow can be placed on the seat, especially suitable for use in the office; 2, scroll-like cushion pillow: this cushion pillow is more convenient to use, suitable for many occasions; 3, inflatable cushion pillow: this cushion pillow is easy to carry, suitable for travel with.