People such as construction workers, whose job involves carrying heavy loads, are particularly prone to developing complications in the back, knees, and hip. Proper lifting technique entails planning your movements, bending the hips and knees to squat down to the load rather than bending the back to lift, also pay attention to keep the object that you are lifting close to the body and straighten the legs as you lift. Strengthening the back, knees, and hips is another way to prevent pain. Building up the muscles allows them to function properly without causing wear and tear to the joint cartilage.