The human spine is a strong structure formed by intervertebral discs connected to the vertebral body, supplemented by strong muscles and ligaments outside for support. If we sit in a forward-flexed position for too long, it will make these muscles and ligaments relaxed and stretched, which in turn will cause fatigue and pain in the lumbar muscles, and in serious cases will also lead to pain in the back, neck and other muscles. 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, it takes 7 hours for this lumbar muscle fatigue to disappear and for the muscles to return to their normal state. Therefore, 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, because this rest or sitting more comfortable, especially the nature of some work to sedentary people. For people who need to work sedentary, if the cushion pillow behind 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 caused by low back and neck and shoulder pain!