# \[Solved\]HRSS caculate problem

**URL:** <https://forum.intervals.icu/t/solved-hrss-caculate-problem/67039>\
**Category:** Bug Reports\
**Created:** [13 May 2024 11:56 UTC](https://forum.intervals.icu/t/solved-hrss-caculate-problem/67039 "2024-05-13T11:56:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![chenliu](https://forum.intervals.icu/user_avatar/forum.intervals.icu/chenliu/32/25896_2.png) [@chenliu](https://forum.intervals.icu/u/chenliu)\
**Post date:** [13 May 2024 11:56 UTC](https://forum.intervals.icu/t/solved-hrss-caculate-problem/67039/1 "2024-05-13T11:56:21Z")

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@david  
below is my work informationn  
[https://intervals.icu/activities/i39563575](https://intervals.icu/activities/i39563575)  
work trimp is 301.8749

```auto
{
	"type": "HRSS",
	"icu_training_load": 170,
	"data": [],
	"resting_hr": 46,
	"lt_hr": 178,
	"max_hr": 196,
	"rSquared": null,
	"trainingDataCount": 100
}

```

I caculate work hrss by [Elevate](https://github.com/thomaschampagne/elevate/issues/341#issuecomment-322047898) methord as

 ![image](https://forum.intervals.icu/uploads/default/original/3X/2/f/2fd4839f91b97ff7bfecba2d3a430690f0a0c146.png)  
The difference between the calculation result 164.9035 and the icu result 170 is a bit big  
I’m not sure what’s wrong

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<div class="post-metadata">

**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 May 2024 03:27 UTC](https://forum.intervals.icu/t/solved-hrss-caculate-problem/67039/2 "2024-05-14T03:27:14Z")

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Intervals.icu computes how many seconds you spent at each bpm value for the activity, computes HRSS for each bpm value and adds it all up to get HRSS for the whole activity. It doesn’t use the activity average HR.

That’s probably why it is different?

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<div class="post-metadata">

**Author:** ![chenliu](https://forum.intervals.icu/user_avatar/forum.intervals.icu/chenliu/32/25896_2.png) [@chenliu](https://forum.intervals.icu/u/chenliu)\
**Post date:** [14 May 2024 11:16 UTC](https://forum.intervals.icu/t/solved-hrss-caculate-problem/67039/3 "2024-05-14T11:16:28Z")

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Thanks david, I used your method to calculate it, and it matches well with the ICU result.