Final answer:
To prevent back injuries when lifting, always bend your knees, keep the object close to your body, and avoid twisting at the waist.
Explanation:
Three guidelines to prevent back injuries when lifting something:
- Bend your knees: Instead of bending at the waist, squat down using your knees to lift the object.
- Hold the object close to your body: Keeping the object close reduces strain on your back muscles.
- Avoid twisting at the waist: Face the direction you are moving without twisting to prevent back injuries.
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