This book investigates the fundamental requirements and training methodologies necessary for an individual to successfully prepare for and complete a triathlon. Sisson provides a structured overview of the sport, which integrates swimming, cycling, and running into a single competitive event. The text serves as an introductory framework for athletes looking to understand the physiological demands and logistical preparations required for multisport racing. By breaking down the three disciplines, the author outlines the basic training principles needed to build endurance and transition between sports effectively.

Readers frequently identify this text as a foundational resource for beginners entering the sport of triathlon. Experts note that the prose is accessible and provides a clear, entry-level roadmap for those unfamiliar with the specific demands of multisport training.