Biomechanics is the application of mechanics to the study of the structure, function, and motion of mechanical aspects of biological systems at any level, from whole organisms to organs, cells, and cell organelles. Biomechanics is a discipline of biophysics concerned with the mechanics of living organisms. Biomechanics is a branch of the larger field of kinesiology that focuses on the mechanics of movement. It is a basic and applied science that includes both study and practical application of its findings. Biomechanics encompasses not only the structure and movement of bones and muscles, but also the mechanics of blood circulation, renal function, and other bodily systems. Human movement is achieved through a complex and highly coordinated mechanical interaction between bones, muscles, ligaments, and joints within the musculoskeletal system under gravity and other loads, and is regulated by the neurological system. Any injury or lesion to any of the separate elements of the musculoskeletal system will alter the mechanical interaction, resulting in movement degradation, instability, or disability. On the other side, proper mechanical environment modification, manipulation, and control can assist prevent injury, correct abnormalities, and hasten healing and rehabilitation. As a result, utilising motion analysis to understand the biomechanics and stress of each element during movement is beneficial for studying disease causation, formulating therapy decisions, and evaluating treatment outcomes.