List four rules that should be followed when picking up objects?

1. Bend at the knees, not at the waist, to lift objects from the ground.
2. Keep the object close to your body while lifting to reduce strain on your back.
3. Use proper lifting techniques, such as keeping a straight back and avoiding twisting while lifting.
4. Know your limits and ask for help if an object is too heavy or awkward to lift safely on your own.