Most people are required to sit in front of their computers to perform highly engaging tasks. Brain is active, but body is not. The human body is designed to move, not to be still. Sitting still causes muscles to get “cold” and have little blood circulation. Lack of circulation means lack of oxygenated blood to your muscles, causing them to contract. This results in tension, discomfort, and pain. Incorrect posture and body mechanics also lead to aggravation of nerves and muscle tension.