# Calculate Fatigue and From based on eFTP?

**URL:** <https://forum.intervals.icu/t/calculate-fatigue-and-from-based-on-eftp/93692>\
**Category:** Training\
**Created:** [12 March 2025 09:41 UTC](https://forum.intervals.icu/t/calculate-fatigue-and-from-based-on-eftp/93692 "2025-03-12T09:41:08Z")\
**Posts on this page:** 1\
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**Author:** ![R2Tom](https://forum.intervals.icu/user_avatar/forum.intervals.icu/r2tom/32/50144_2.png) [@R2Tom](https://forum.intervals.icu/u/R2Tom)\
**Post date:** [12 March 2025 16:51 UTC](https://forum.intervals.icu/t/calculate-fatigue-and-from-based-on-eftp/93692/2 "2025-03-12T16:51:42Z")

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You probably can do that yourself with a custom field which overwrites original load  
See there for more details

> [@Allow users to choose alternatives to TSS](https://forum.intervals.icu/t/allow-users-to-choose-alternatives-to-tss/92351/17):
>
> You can actually update the default activity training load from a custom activity field script. Return your custom value but also update the value on the activity: activity.icu\_training\_load = ... Then your custom calc will automatically show up on all the usual charts.

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