Causes of Muscle Stiffness
What Is A Vicious Cycle of Muscle Stiffness Development?
Stiffness is a state of persistent tension and fatigue, causing muscles to tighten to become thicker and stiffer. Stiffened muscles compress the blood vessels, impairing the circulation of the blood, and causing wastes to accumulate. The impaired blood circulation caused by excess wastes creates even more muscle tension, resulting in a vicious cycle of stiffness.
The weight of an adult head is about 6-9kg (about 1/8 of body weight), and the weight of two arms is 8-10kg. Modern people often sit in front of a computer with the same posture or wrong posture for long hours. This will increase the burden on the neck, shoulders, and back, and will, in turn, cause muscle tension which results in body stiffness in the long term.