Which of the following is an example of an ergonomic principle?

Using proper lifting techniques is a foundational ergonomic principle aimed at reducing the risk of musculoskeletal injuries and promoting overall workplace safety. Ergonomics focuses on designing workspaces, tasks, and tools to fit the capabilities and limitations of workers in order to improve efficiency and well-being. Proper lifting techniques, such as keeping the load close to your body, bending at the knees rather than the waist, and ensuring a stable base of support, help minimize strain on the back and joints, thereby contributing to safer handling practices and reducing the likelihood of injuries.

The other options presented are contrary to ergonomic principles. Working long hours can lead to fatigue and decreased productivity, while using excessive force can increase the risk of injuries and strain. Ignoring safety gear compromises personal protection and overall safety, which is the opposite of promoting a healthy and secure work environment.