TrainingPeaks is a training and performance platform focused on endurance athletes such as runners, cyclists, and triathletes, combining workout scheduling, tracking, and analytics. It lets users sync data automatically from devices and apps like Garmin, Apple Watch, Zwift, and more to maintain a centralized training log. Workouts can be planned (either by coaches or via prebuilt plans) and published to an athlete’s calendar, and after execution, the platform analyzes the training stress, fitness load, recovery, and performance trends using metrics such as TSS (Training Stress Score), CTL (Chronic Training Load), ATL (Acute Training Load), TSB (Training Stress Balance), and normalized power. Coaches using TrainingPeaks have access to athlete management tools, performance dashboards, compliance scoring, commenting on workouts, and integrated communication.