Biomechanics in sport incorporates a detailed analysis of sport movements in order to minimise the risk of injury and improve sports performance. Sport and exercise biomechanics encompasses the area of science concerned with the analysis of the mechanics of human movement. It refers to the description, detailed analysis and assessment of human movement during sport activities. Mechanics is a branch of physics that is concerned with the description of motion/movement and how forces create motion/movement. In other words, sport biomechanics is the science of explaining how and why the human body moves in the way that it does. In sport and exercise, that definition is often extended to also consider the interaction between the performer and their equipment and environment. Biomechanics is traditionally divided into the areas of kinematics which is a branch of mechanics that deals with the geometry of the motion of objects, including displacement, velocity, and acceleration, without taking into account the forces that produce the motion while kinetics is the study of the relationships between the force system acting on a body and the changes it produces in body motion. In terms of this, there are skeletal, muscular and neurological considerations we also need to consider when describing biomechanics.
This video explains the three stages of learning motor skills. Fitts and Posner's three stage model is a traditional cognitive theory for explaining motor learning. It is thought that through practice, learners progress through the three stages in a linear manner. It is important that coaches and other practitioners use motor learning theories to guide the prescription of practice.
This video gives a brief overview of each stage within P. Fitts & M. Posner 'Process of learning motor skills'. It gives both a visual and textual representation of each stage of learning relevant to the sporting world. Cognitive, Associative and Autonomous.
Stages of Learning: Skill Acquisition - Physical Education PE, Sport (Motor Skills)