Which of the following is a key principle of body mechanics relevant to lifting?

Keeping the load close to your body is a key principle of body mechanics relevant to lifting because it helps minimize the strain on your back and reduces the risk of injury. When a load is held close, the center of gravity is kept within your base of support, providing better stability and control. This positioning also allows for more effective force and power generation from your legs, which are stronger and better suited for lifting compared to your back muscles.

In contrast, using only your arms to lift can lead to overexertion of the upper body and potential injury, as it does not utilize the strength of the legs or core. Lifting with your back can put excessive stress on the spinal column and surrounding muscles, increasing the likelihood of back injuries. Twisting while lifting is particularly hazardous as it places undue pressure on the spine and can lead to serious injuries; proper lifting techniques advocate for pivoting your feet instead of twisting your torso when moving a load.