Which is NOT a safe practice when lifting loads?

Lifting heavy loads without assistance is not a safe practice because it increases the risk of injury, particularly to the back. The proper biomechanics of lifting emphasize the importance of using body mechanics that distribute the load appropriately to minimize strain. Keeping heavy loads close to the body, shifting the feet to turn rather than twisting the torso, and using the legs to lift are all recognized ergonomic practices that help to maintain proper posture and leverage during lifting. These methods reduce the likelihood of accidents and injuries, whereas attempting to lift heavy objects alone can lead to improper form and substantial physical stress, making assistance essential when dealing with significant weight.