To reduce lifting risk, store materials at which height?

• A. Knee height
• B. Waist height
• C. Above shoulder height
• D. Floor level

Answer: (B)

Storing materials at waist height keeps the load in a position that lets your body stay in a neutral, mid-range posture. This minimizes the amount of bending and reaching you have to do and keeps the load close to your body, so you can use your leg muscles to lift rather than putting strain on your lower back. That reduces the lever arm and the twisting forces on the spine, lowering the risk of back injuries during lifting and placing items.

Placing things at knee height would require more bending and hip flexion before lifting, increasing spinal flexion and strain. Lifting from the floor demands deep squatting or bending, which is tough on the back and shoulders and can lead to awkward twists. Pushing or reaching above shoulder height introduces overhead strain on the shoulders and neck and also loosens control of the load, raising the chance of a drop or slip.

If an item is very heavy or awkward, use mechanical aids or team lifting, but keeping most materials at around waist height generally offers the safest, most ergonomic balance for lifting.