The formula to calculate the Functional Threshold Power (FTP) is:
\[ FTP = 0.93 \times 20AP \]
Where:
FTP stands for Functional Threshold Power. This term is used in the sport of cycling to describe the average power output a cyclist can maintain over an hour of all-out effort. Functional Threshold Power is achieved at between 85-90% of the maximum heart rate. Since an hour-long time trial is mentally and physically exhausting, cyclists use 20-minute time trial estimates for determining Functional Threshold Power (FTP).
Let's assume the following value:
Using the formula:
\[ FTP = 0.93 \times 250 = 232.5 \, \text{watts} \]
The Functional Threshold Power (FTP) is 232.5 watts.