It is easier to pull, push, or roll an object than it is to lift it.
Movements should be smooth and coordinated rather than jerky.
Less energy or force is required to keep an object moving than it is to start and stop it.
Use the arm and leg muscles as much as possible, the back muscles as little as possible.
Keep the work as close as possible to your body. It puts less of a strain on your back, legs, and arms.
Rock backward or forward on your feet to use your body weight as a pushing or pulling force.
Keep the work at a comfortable height to avoid excessive bending at the waist.
Keep your body in good physical condition to reduce the chance of injury.