The manual handling of loads is a fairly frequent task in many activity sectors, being responsible in many cases of the appearance of physical fatigue or injuries which are produced immediately or owing to the accumulation of minor trauma of no apparent importance.
Injuries may affect workers who handle loads regularly, as well as those who do so only occasionally.
The manual handling of loads entails both direct (lifting, placing) and indirect (pushing, pulling, displacing) human effort. Transporting and maintaining a lifted load also constitutes manual handling. It includes holding with the hands or with other parts of the body, such as the back, and passing the load from one person to another.
The application of forces such as the movement of a control handle or lever does not constitute load handling.