# Inferring a chang in the from a stress score **URL:** \ **Category:** Training\ **Created:** [29 May 2023 11:20 UTC](https://forum.intervals.icu/t/inferring-a-chang-in-the-from-a-stress-score/39643 "2023-05-29T11:20:32Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![bmacher](https://forum.intervals.icu/user_avatar/forum.intervals.icu/bmacher/32/21363_2.png) [@bmacher](https://forum.intervals.icu/u/bmacher)\ **Post date:** [29 May 2023 11:20 UTC](https://forum.intervals.icu/t/inferring-a-chang-in-the-from-a-stress-score/39643/1 "2023-05-29T11:20:32Z")
Hi, I am wondering if intervals has a tool in place, thats helps by deciding whether a workout will have to much impact on my form (will be below -30) or not. Something like a given stress score of 70 will drop my form curve by 5 point. This would help in choosing the right training. Thanks guys! ---
**Author:** ![david](https://forum.intervals.icu/user_avatar/forum.intervals.icu/david/32/30189_2.png) [@david](https://forum.intervals.icu/u/david)\ **Post date:** [29 May 2023 18:44 UTC](https://forum.intervals.icu/t/inferring-a-chang-in-the-from-a-stress-score/39643/2 "2023-05-29T18:44:54Z")
You could try adding the workout to your calendar and see what it does to your form. Then you can choose to keep it or replace it with something else. ---
**Author:** ![bmacher](https://forum.intervals.icu/user_avatar/forum.intervals.icu/bmacher/32/21363_2.png) [@bmacher](https://forum.intervals.icu/u/bmacher)\ **Post date:** [30 May 2023 05:32 UTC](https://forum.intervals.icu/t/inferring-a-chang-in-the-from-a-stress-score/39643/3 "2023-05-30T05:32:14Z")
Good idea. 🙂 Do you know how to calculate it, so I could write a tool myself? ---
**Author:** ![Gerald](https://forum.intervals.icu/user_avatar/forum.intervals.icu/gerald/32/28423_2.png) [@Gerald](https://forum.intervals.icu/u/Gerald)\ **Post date:** [30 May 2023 08:02 UTC](https://forum.intervals.icu/t/inferring-a-chang-in-the-from-a-stress-score/39643/4 "2023-05-30T08:02:56Z")
The calculations are as follows: - Load = (sec x Normalised Watts x Intensity) / (FTP x 3600) x 100 - Intensity = Normalised Watts / FTP The software does it for you, so no need to try calculate it. Use the [workout builder](https://forum.intervals.icu/t/workout-builder/1163) for this. Edit: _The words **Load** (TSS), **Normalised Watts** (Normalized Power) and **Intensity** (Intensity Factor) are used on Intervals, because the other terms (in brackets) are registered trademarks of Peaksware LLC._ ---
**Author:** ![bmacher](https://forum.intervals.icu/user_avatar/forum.intervals.icu/bmacher/32/21363_2.png) [@bmacher](https://forum.intervals.icu/u/bmacher)\ **Post date:** [30 May 2023 08:36 UTC](https://forum.intervals.icu/t/inferring-a-chang-in-the-from-a-stress-score/39643/5 "2023-05-30T08:36:53Z")
Thanks. However, I don’t want to calculate the load, etc. but the impact on my power curve. 😌 ---
**Author:** ![Gerald](https://forum.intervals.icu/user_avatar/forum.intervals.icu/gerald/32/28423_2.png) [@Gerald](https://forum.intervals.icu/u/Gerald)\ **Post date:** [30 May 2023 08:50 UTC](https://forum.intervals.icu/t/inferring-a-chang-in-the-from-a-stress-score/39643/6 "2023-05-30T08:50:27Z")
This might help you. > [@Calculate Needed Training Load?](https://forum.intervals.icu/t/calculate-needed-training-load/5788/52): > > This seemed an appropriate place to share that I have made some updates to the above discussed Google Sheets doc that leverages the Intervals.icu API. This is the Direct Link to take a copy from if you want to use it: [Next Activity\_icu v1.1 (shared) - Google Tabellen](https://docs.google.com/spreadsheets/d/1cffmQ20Y4LPUQ-XrAulr-m0GD_LUBQj39ue3YWTNZ3Q/edit?usp=sharing) And it is kept in this shared Google Drive folder, where I will put any further updates: [Next Activity\_icu – Google Drive](https://drive.google.com/drive/folders/111ji2LYKzKAPIPHKXvpdpxrLlE_f-vNI?usp=sharing) What’s new? I have added a FAQ (or readme) tab which I think addresses most of the ambiguity encountered … ---
**Author:** ![bmacher](https://forum.intervals.icu/user_avatar/forum.intervals.icu/bmacher/32/21363_2.png) [@bmacher](https://forum.intervals.icu/u/bmacher)\ **Post date:** [30 May 2023 11:02 UTC](https://forum.intervals.icu/t/inferring-a-chang-in-the-from-a-stress-score/39643/7 "2023-05-30T11:02:54Z")
Thank you, I’ll give it a try.