Final answer:
To lift an object safely, the nurse aide should bend the knees and keep the back straight, using the strength of the legs to protect the back from strain and to distribute the object's weight evenly.
Step-by-step explanation:
To lift an object using good body mechanics, the nurse aide should bend the knees and keep the back straight. When lifting, the muscles in your legs are stronger and less prone to injury than your back muscles. By keeping your back straight, you ensure that your spine is aligned and the forces on it are minimized. This position also helps distribute the weight of the object more evenly and reduces stress on any single part of the body. It's equally important to lift using the strength of your legs to further protect the back from strain.
Moreover, good posture when standing or sitting means that a person's center of gravity is directly above the hips, avoiding back strain and potential disk damage. Lifting with your legs, not your back, is a key body mechanics function that we develop from an early age. To increase stability, the feet should be spaced apart, creating a wider base of support. This not only aids in balance but also enhances the lifting power by allowing the legs to generate upward force effectively.