A tool designed to determine the optimal Functional Threshold Power (FTP) training zones assists athletes in personalizing their cycling or running workouts. By inputting an FTP value, often derived from a performance test, the tool calculates specific wattage or pace ranges corresponding to different training intensities, from active recovery to maximum effort. For example, an athlete with an FTP of 250 watts might see zones ranging from under 137 watts for recovery rides to over 350 watts for anaerobic interval training.
Structured training based on these personalized zones allows for more effective workouts. Athletes can target specific physiological adaptations by training within prescribed power or pace ranges. This precision helps avoid overtraining by ensuring adequate recovery and maximizes training benefits by stressing the correct energy systems. Historically, training zones were often based on generalized percentages of maximum heart rate, which can be less precise than power-based zones due to individual variability and the lag time inherent in heart rate response.