Hazards of Prolonged Sitting on Office Chairs

The hazards of prolonged sitting on office chairs involve multiple body systems, including the skeletal-muscular, cardiovascular, metabolic, and reproductive systems, among others. The specific hazards are as follows:

1. Skeletal-Muscular System Injuries
   When sitting for long periods with incorrect posture, the pressure on the lumbar spine can soar to 180 kilograms, leading to lumbar spine issues in over 65% of office workers, such as herniated discs and lumbar muscle strain. Additionally, prolonged pressure on the buttocks can impede local blood circulation, causing buttock boils. The neck and waist muscles gradually stiffen due to lack of movement, affecting the blood supply to the head from the vertebral arteries, disrupting the normal physiological curvature of the cervical and lumbar spines, and resulting in problems like hunchback and bone spurs, accompanied by sagging, pain, and spasms in the waist, abdomen, and back muscles. Long-term sitting can also lead to neck, shoulder, waist, and back pain, with symptoms such as pain, numbness, and stiffness caused by poor local blood circulation, and may even trigger headaches or cervical spondylosis.

2. Increased Cardiovascular System Risks
   Prolonged sitting reduces the heart's workload demand and slows down blood circulation speed. Over the long term, this can lead to a decline in heart function, myocardial atrophy, and an increased risk of cardiovascular diseases such as arteriosclerosis, hypertension, and coronary heart disease. Furthermore, slow blood flow in the lower limbs raises the probability of thrombus formation. If a thrombus detaches, it may block heart blood vessels, triggering cardiovascular and cerebrovascular accidents.

3. Decline in Metabolic and Immune Functions
   Prolonged sitting reduces energy consumption, leading to fat accumulation, especially an increase in abdominal fat, which triggers obesity and lowers the body's resistance. At the same time, poor blood circulation results in insufficient blood supply to the brain, making it prone to symptoms such as fatigue, dizziness, and blurred vision, affecting work efficiency and cognitive function.

4. Impaired Reproductive System Health
   For working women, prolonged sitting can lead to pelvic blood circulation disorders, causing 'ovarian hypoxia,' accelerating ovarian function decline, and bringing on menopause earlier.

5. Renal Function and Urinary System Abnormalities
   Prolonged sitting can compress the bladder meridians in the buttocks and thighs, leading to poor qi and blood circulation and abnormal bladder function, which may trigger problems such as frequent urination, urgent urination, or difficulty urinating.

6. Safety Hazards and Accidental Injuries
   Some office chairs have design flaws, such as broken backrests or failed bolts, which may cause users to fall and get injured, further exacerbating the risk of physical injury.

Suggestions: To reduce the hazards of prolonged sitting, one should get up and move around every 30-60 minutes, maintain correct sitting posture, choose an ergonomic office chair, and regularly perform stretching exercises to promote blood circulation.