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Relative Effort opposite of IF and TSS

  • December 11, 2025
  • 2 replies
  • 21 views

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I did two rides two days apart.  The second ride was longer time, had a significantly greater avg and NP power, higher IF, and higher TSS, yet the Relative Effort was much lower than the first.  How does this work or make sense?

Best answer by Jan_Mantau

The Relative Effort is based on your heart rate or your perceived extertion. It’s independent on power data. For power data the Training Load is calculated. So congratulations, you achieved  better power with lower heart rates! 

2 replies

Jan_Mantau
Superuser
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  • Superuser
  • Answer
  • December 11, 2025

The Relative Effort is based on your heart rate or your perceived extertion. It’s independent on power data. For power data the Training Load is calculated. So congratulations, you achieved  better power with lower heart rates! 


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  • Author
  • Hub Climber
  • December 11, 2025

OK.  So it’s heart rate based.  In this case, I don’t think it’s me getting more awesome but rather my HRM being not so awesome.  I’m going to try going back to the chest strap instead of using the Garmin watch for HR.  I know the watch can be problematic bouncing around on the wrist, etc...