Office Chairs Are Not Suitable for Prolonged Sitting

Office chairs are not suitable for prolonged sitting, primarily due to the various physical injuries they can cause and the discomfort resulting from chair design issues.

I. Injuries to the Lumbar Spine and Muscles
When sitting for long periods, the pressure on the lumbar intervertebral discs is several times greater than when standing, and continuous muscle tension can easily lead to lumbar muscle strain. If the height of the office chair is not adjusted regularly throughout the year, having your feet dangling can cause the lumbar spine to bear 2-3 times the normal sitting pressure, accelerating the occurrence of lumbar muscle strain and lumbar disc herniation.

II. Impact on Blood Circulation
Prolonged sitting can compress the blood vessels in the buttocks and the back of the thighs, obstructing blood flow and increasing the risk of varicose veins in the lower limbs. When your feet are dangling, the edge of the seat can compress the blood vessels at the root of the thighs, leading to long-term ischemia and hypoxia in the lower limbs. This can result in frequent leg numbness, varicose veins in the calves, or even the formation of blood clots. If a blood clot detaches, it can trigger a pulmonary embolism, which can be life-threatening. Additionally, prolonged sitting keeps the body in the same position, causing muscle tension and poor blood circulation, and increasing the risk of cardiovascular disease.

III. Impact on the Cervical Spine and Digestive Function
When sitting for long periods, the cervical spine tends to tilt forward, which can easily cause stiffness in the neck muscles and, in severe cases, compress nerves. Additionally, intestinal peristalsis slows down, and digestive function declines. Although these harms may not be immediately apparent, they can cause irreversible damage over time.

IV. Discomfort Caused by Chair Design Issues
Some office chairs focus on functionality while neglecting comfort, failing to fit the back and waist properly, leading to improper sitting posture and causing fatigue and discomfort. Prolonged use of hard chairs can cause pain, while chairs with wheels may lack stability, keeping the body's muscles in a tense state and further exacerbating fatigue.

Recommendations: People who sit in an office chair for more than 6 hours each workday may experience warning signs such as back pain, neck stiffness, etc. Ignoring these signs can pose health risks. It is recommended to stand up and move around for 5 minutes every 45 minutes, or stand up for 2 minutes every 40 minutes of sitting. Simple actions such as tiptoeing and rotating the ankles can relieve muscle tension and promote blood circulation.