Arousal is the key issue in sport psychology. Specifically, physical and technical performance depends on the level of performer’s arousal. However, arousal is determined by psychological processes such as emotions, which, in turn, depend on higher cognitive functions like thoughts. Arousal reflects general physical and psychological activity. In the following videos, Callum Moss introduces the concept of arousal, discusses some of the theories in arousal, physiological functions in arousal, and also discusses the issue of choking in sport.