Fitness
Intensity Factor (Cycling)
Intensity factor divides normalized power by FTP to show how hard a ride was relative to your current threshold—useful for pacing review.
Intensity factor (IF) in cycling is normalized power divided by your functional threshold power, expressing how hard a ride was relative to current fitness. An IF near 0.
75 often aligns with steady endurance; IF above 1. 0 appears in hard races with many surges.
It helps compare rides of different lengths on one scale. Update FTP regularly or IF becomes misleading.
Common questions
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What IF is appropriate for a long ride?
Many endurance rides sit near 0.65–0.75 IF; much higher IF on long rides usually means you under-fueled or started too hot.
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Can IF exceed 1.0?
Yes in very variable races where NP exceeds FTP; it signals a demanding day requiring extra recovery.
Related terms
Put Intensity Factor (Cycling) into practice
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