Final answer:
The main message of manual handling is to emphasize the importance of proper techniques and precautions when lifting, carrying, and moving objects by hand to avoid musculoskeletal injuries.
Step-by-step explanation:
The main message in the context of manual handling refers to the importance of proper techniques and precautions when lifting, carrying, and moving objects by hand. Manual handling activities can pose a risk of musculoskeletal injuries if not performed correctly. It is important to use correct body mechanics, such as bending at the knees, keeping the back straight, and distributing weight evenly when lifting heavy objects.