Sitting in one position for long periods of time is not good for the body, Our bodies need movement and without that, muscles and joints can stiffen and circulation is affected.
Carrying bags or laptops on one side can throw the body out and cause joint strain. Common activates such as using the telephone under one ear and particularly holding it in place with the shoulder while looking for the relevant papers can cause severe side-bending to the cervical spine which can lead to spasm and joint locking.
Increasingly, office workers are suffering from overuse symptons or RSI (Repetitive Strain Injuries) from using a keyboard and mouse. Regular breaks can be helpful together with stretching exercises to rebalance the affected muscles and tendons with stretching exercises to rebalance the affected muscles and tendons.