What aspect does biomechanics primarily examine in relation to the body?

The focus of biomechanics is on understanding the principles of movement, particularly how joints move and how forces are distributed throughout the body during various activities. This includes analyzing how different body structures work together to produce movement, the range of motion at joints, and the load that muscles, tendons, and ligaments experience during physical activity. By studying these elements, biomechanics provides insights into the mechanics of human motion and helps in the assessment and treatment of musculoskeletal disorders. It also informs the design of rehabilitation programs and ergonomic tools, thereby improving physical performance and reducing the risk of injury. Each of the other options pertains to different fields: dietary influences are related to nutrition, emotional responses to pain are explored within psychology and pain management, and global health metrics concern public health statistics rather than individual movement mechanics. This distinction clarifies why the emphasis on joint movement and force distribution is central to biomechanics.