Which principle is essential for safely lifting heavy objects?

Keeping the load close to the body is essential for safely lifting heavy objects because it minimizes strain on the back and reduces the risk of injury. When the load is held close, the center of gravity is maintained, allowing for better balance and control during the lift. This principle utilizes the natural strength of the legs and promotes proper biomechanics, which are crucial in effectively managing the load's weight. Maintaining proximity between the load and the body means that less effort is required to lift and move the object, significantly reducing the likelihood of musculoskeletal injuries.

While other principles, such as seeking assistance when necessary, have their importance, the act of keeping the load close directly impacts lifting technique and safety, making it a fundamental aspect of proper lifting practices.