A tool used to estimate functional threshold power (FTP) in cyclists measures the highest sustainable power output a rider can maintain for approximately one hour. This estimation typically derives from performance in shorter, more manageable timed trials, such as a 20-minute maximal effort, and applies a correction factor. For example, a 20-minute test result might be multiplied by 0.95 to estimate one-hour sustainable power.
Accurate power profiling provides a cornerstone for structured training. Knowing one’s FTP allows for precise workout targeting, ensuring optimal training stimuli and minimizing the risk of overtraining or insufficient load. This personalized approach to training intensity has gained prominence alongside the increasing availability of power meters and sophisticated training software. It represents a shift from less precise metrics like heart rate, which can be influenced by various external factors.