This book provides a review and discussion of the recent move towards the positive aspects and consequences of competitive anxiety. Following a description of competitive stress-related terminologies, conceptual and psychometric developments are considered including the notion of directional anxiety interpretations. The commentary then focuses on the theories and models that outline the potential positive aspects of anxiety in relation to athletic performance. Applied implications and future research directions are also discussed together with a number of explicatory statements regarding the nature of the precompetitive stress experience in sport.