This book presents a focused examination of how acupuncture may help athletes regulate competitive anxiety through measurable physiological and clinical pathways. Drawing from Western biomedical research and Traditional Chinese Medicine theory, it explores how stress affects concentration, recovery, emotional balance, and performance under pressure. The discussion highlights biological markers such as heart rate variability, cortisol, skin conductance, and brain activity, while also considering cognitive and somatic dimensions of anxiety in sport. By bringing together human studies, experimental findings, and integrative treatment perspectives, the manuscript offers a clinically grounded view of how acupuncture may support athletes before, during, and beyond competition. It is written for practitioners, sports professionals, and thoughtful readers seeking a clearer understanding of the relationship between anxiety, autonomic regulation, resilience, and performance. Overall, it offers an informed and balanced perspective on integrative care in demanding competitive environments. Its approach values evidence, context, and practical insight without losing clarity.