Tss form etc vs TP

[CraigA]

Hi I have used training peaks a lot in the past and am considering transferring my training plans to intervals as I like the software. I’ve noticed tss, etc is different in the platforms. Eg today I’m at 46 fitness in training peaks

[Gerald]

Fitness, here, is calculated using today’s values, whereas TP will use yesterday’s values.

Once you have your history imported, the trend will be the same.

Form (TSB) as of yesterday or today's?

@david According below sources form should be computed on yesterday ctl & yesterday atl: Part 3: Training Stress Balance—So What? - Joe Friel => “the resulting TSB value is for tomorrow—not for today.” (This is TSB details from the Joe Friel article you are referencing on the fitness feature itself) What is the Performance Management Chart? | TrainingPeaks => " by subtracting yesterday’s Fatigue from yesterday’s Fitness we come up with the yellow line, or the Form" What is the Perfor…

TSS is called load and should be the same.

[CraigA]

Thanks

Would that explain such a big difference in the numbers?!

[nasatt]

The numbers are the same for me.
Assume you have your FTP set the same in both platforms?

[Gerald]

What would define as a big difference?

You can set your FTP retrospectively, so that it ties up with TP. Then refresh the data to bring everything inline.

I looked at my data for 22/02/2023 and today because of the difference in the calculation of fitness and fatigue:
Intervals vs WKO5

[CraigA]

I’ll look into the ftp settings. Over 10% difference from a function which looks at 42 days doesn’t make sense that it is caused due to the one day difference in calculations time, so I’d say it’s without doubt a big difference which I quoted!

Thanks for the help