Now most of the people are often sitting in the office, whether it is white-collar workers, students, or doctors. Long ago, many people think that is very comfortable to sit in office. For myself, I am a student, when I wake up in the morning, I take class sit in my classroom, after class I will sit in library do my home, when I came home after school I still sit in front of the computer desk. For my whole is probably more than half of the time sitting. I think that many people like me. But now is a sedentary lifestyle bad for people's health? A long time to sit It is easy to cervical spondylitis. The root causes of cervical spondylitis, cervical disc retrograde degeneration, the disc loose, and then oppressed the nerve root, spinal cord or vertebral artery caused by a variety of symptoms. Long-term poor posture or long stay in front of the computer, most likely to cause neck muscle fatigue caused by the neck and shoulder pain, Xiang muscle spasm, and even dizziness; the passage of time is bound to occur prematurely in adult cervical intervertebral disc degeneration , resulting in cervical spondylitis. Long in the tension state due to long-term sedentary, some sitting posture, or always fixed in one position makes the waist soft tissue, soft tissue ischemia, arising from the strain of lumbar muscles. Hundreds of millions of cells in the human body depends on the transport of blood to complete its metabolic functions, sedentary, the amount of oxygen-carrying blood allows the body to reduce the oxygen partial pressure to reduce and carrying carbon dioxide increase in blood volume, carbon dioxide partial pressure, and cause muscle soreness, stiffness, atrophy.