Achieving success in sport, particularly at the elite level, is a complex process. Monitoring an athlete’s training program ensures athletes are in the best possible condition to train. It helps coaches construct individualized training programs and optimize the prescription of training load and recovery. Monitoring also assists in identifying such potential problems as injury, illness, mental well-being, nutrition, and sleep. Each of these factors can affect an athlete’s ability to train consistently, and managing them effectively leads to a competitive edge.