Sports biomechanics focuses on the human movement in our sports activity from the view point of the mechanics. Sports biomechanics has mainly two approaches, Kinematics and Kinetics. Kinematics is focusing on the displacement, velocity, acceleration and their angular alternatives, namely the result of the movement. Kinetics is focusing on the force/ moment, power and energy, namely, the source of the movement. I addition to these approaches, since our human motion is caused by the signal from our brain. A neuro physical approach is necessary for sports biomechanics. In this lecture, we will study how sports biomechanics enhance the athletes performance and prevent injury.