Need help? Email support@trainerroad.com

FTP , IF , TSS , NP

There are far too many acronyms in the sport of cycling, so here is your cheat sheet for all the important ones

FTP: Functional Threshold Power

  • This is theoretically the maximum steady-state power you could hold for about an hour
  • It is a way to quantify your current level of fitness- many of your other zones will scale fairly linearly relative to your FTP
  • All of your rides are based on a percentage of your FTP

IF: Intensity Factor

  • This is a way of quantifying how intense your ride was
  • The scale is based on this: An IF of 1.0 would be equivalent to performing at FTP for 1 hour. Aka, your body could not possibly work any harder.
  • A 0.8 IF would represent a ride that averaged 80% of your Functional Threshold Power

TSS: Training Stress Score

  • This is the amount of stress that a workout inflicts on your body
  • With a large TSS, there is a greater opportunity for growth but also a greater need for proper recovery
  • Calculated based on a combination of IF and duration

NP: Normalized Power

  • This metric is similar to average power, with one minor difference
  • This metric "weights" different power zones differently. It gives more weight to your harder intervals and more closely represents the physiological toll
  • The purpose of this is to attempt to estimate the power you could have produced had you been constant throughout the ride
  • This allows you to more honestly compare one ride to another since the rest intervals have less of an effect on the overall average

Have More Questions? We Can Help!

Contact Support