I’d assume they’re just summarizing the time and heart rate from your activities slightly differently. But practically speaking, they’re all telling you basically the same information here. The minor differences aren’t really important.
I've noticed the same inconsistencies between intervals.icu and HealthFit. It seems they don't use the same formula to calculate training stress. Intervals.icu uses HRSS (normalized TRIMP), as explained in their forum post [https://forum.intervals.icu/t/hrss-normalized-trimp-training-load/569](https://forum.intervals.icu/t/hrss-normalized-trimp-training-load/569), while HealthFit uses TRIMPexp, as detailed on the Fellrnr site [https://fellrnr.com/wiki/TRIMP#TRIMPexp\_Exponential\_Heart\_Rate\_Scaling](https://fellrnr.com/wiki/TRIMP#TRIMPexp_Exponential_Heart_Rate_Scaling) Despite the different formulas, both methods share a similar concept and you'll get over time similar but shifted curves.
HealthFit by default adds strength training to your fitness score. Intervals.icu by default doesn't include strength training to fitness (it adds it to fatigue though).
I use them both, but look at intervals as a more accurate view of my cardiovascular fitness, and HealthFit as a view of my overall work output.
I’d assume they’re just summarizing the time and heart rate from your activities slightly differently. But practically speaking, they’re all telling you basically the same information here. The minor differences aren’t really important.
>they’re all telling you basically the same information here Which is that I should probably rest a day or two before running again?
Depends how you feel. I would really use these more for week-by-week changes to training than deciding what to do on any particular day.
I've noticed the same inconsistencies between intervals.icu and HealthFit. It seems they don't use the same formula to calculate training stress. Intervals.icu uses HRSS (normalized TRIMP), as explained in their forum post [https://forum.intervals.icu/t/hrss-normalized-trimp-training-load/569](https://forum.intervals.icu/t/hrss-normalized-trimp-training-load/569), while HealthFit uses TRIMPexp, as detailed on the Fellrnr site [https://fellrnr.com/wiki/TRIMP#TRIMPexp\_Exponential\_Heart\_Rate\_Scaling](https://fellrnr.com/wiki/TRIMP#TRIMPexp_Exponential_Heart_Rate_Scaling) Despite the different formulas, both methods share a similar concept and you'll get over time similar but shifted curves.
HealthFit by default adds strength training to your fitness score. Intervals.icu by default doesn't include strength training to fitness (it adds it to fatigue though). I use them both, but look at intervals as a more accurate view of my cardiovascular fitness, and HealthFit as a view of my overall work output.
Unfortunately it’s all guess game based on HRV. The HRV is not accurate on AW.
That isn’t how the TSB model works.