# LTHR Calculation

**URL:** <https://forum.intervals.icu/t/lthr-calculation/23734>\
**Category:** Uncategorized\
**Created:** [13 November 2022 17:44 UTC](https://forum.intervals.icu/t/lthr-calculation/23734 "2022-11-13T17:44:22Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**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:** [14 November 2022 18:06 UTC](https://forum.intervals.icu/t/lthr-calculation/23734/10 "2022-11-14T18:06:05Z")

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It is displayed like “FTP Up” but your LTHR is not automatically updated. It is easy to run a high HR if you get thirsty or it is very hot etc. so you need to decide if the new value is valid or not.

![Screen Shot 2022-11-14 at 20.07.09](https://forum.intervals.icu/uploads/default/original/2X/1/1b3a51b51de689108e4bb6b766af77c3a5ccc8d1.png)

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