Which of the following is a safe practice when lifting?

Using legs to lift is a fundamental safe practice that helps to prevent injury when handling heavy objects. The proper lifting technique involves bending at the knees while keeping the back straight, which utilizes the stronger muscles in the legs and minimizes stress on the back and spine. This method not only allows for better balance and control but also significantly reduces the risk of strains and sprains that can occur when lifting with the back or poor posture.

In contrast, keeping both feet together can lead to instability and increase the risk of falling. Bending at the waist primarily engages the back muscles, which are more susceptible to injury when lifting heavy objects. Twisting the body while lifting can also place undue stress on the back, leading to potential injuries. Therefore, utilizing the legs for lifting is the safest approach and encourages proper biomechanics and injury prevention.