What are the proper mechanics for lifting and lowering objects?

The proper mechanics for lifting and lowering objects focus on minimizing the risk of injury and maximizing efficiency. The correct choice emphasizes bending at the knees and using the strength of the legs to lift. This technique distributes the weight more evenly and utilizes the power of larger muscle groups in the legs rather than straining the back, which is more susceptible to injury when lifting heavy items.

When bending at the knees, the body adopts a stable position that reduces the load on the spine, as the legs are specifically designed to handle weight. Keeping the back straight while lifting further enhances this protective posture. This method also provides better balance and control, allowing a person to manage the load more effectively.

Other options suggest unsafe or inefficient lifting techniques. For instance, lifting with the back can lead to serious injuries, while keeping feet close together may not provide a stable base needed for lifting safely. Using arms alone to lift does not utilize the full strength and support of the body, which can also lead to strain and injury.