This section addresses Cumulative Trauma Disorders, and ergonomic hazard.

There are five main risk factors that contribute to the development of a CTD:

1. Position - When working with the wrists approximately straight, elbows at about 90°, shoulders relaxed and the spine kept in its natural “S” curve, the strain placed on muscles, tendons, discs and ligaments is minimized.

2. Force - The more force required to perform a particular task, or the longer that force must be applied, the greater the risk of developing a CTD.

3. Repetition - Tasks that use the same muscles and tendons over and over, require more muscle […]