# Functional threshold power Sources: - ChatGPT See also: - [[My Functional Threshold Power]] ## Summary ## Notes Functional threshold power (FTP) is the highest average power output a cyclist can sustain for one hour without fatigue. It is often used to measure a cyclist's fitness level and to set training zones for interval training and other workouts. FTP is typically determined through a specific test or by analyzing power data from a race or training ride. FTP is estimated using shorter protocols including the 5- and 20-minute protocols