# Running Economy (ECOR and RE)

**URL:** <https://forum.intervals.icu/t/running-economy-ecor-and-re/3198>\
**Category:** Feature Requests\
**Created:** [4 March 2021 09:45 UTC](https://forum.intervals.icu/t/running-economy-ecor-and-re/3198 "2021-03-04T09:45:52Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Michael\_Domokos](https://forum.intervals.icu/user_avatar/forum.intervals.icu/michael_domokos/32/4038_2.png) [@Michael\_Domokos](https://forum.intervals.icu/u/Michael_Domokos)\
**Post date:** [4 March 2021 09:45 UTC](https://forum.intervals.icu/t/running-economy-ecor-and-re/3198/1 "2021-03-04T09:45:52Z")

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GTN were discussing this in a recent YouTube video and wondered if it was or is a planned feature in intervals? [https://www.trainingpeaks.com/blog/report-the-impact-of-running-cadence-on-running-economy-ecor-and-re/](https://www.trainingpeaks.com/blog/report-the-impact-of-running-cadence-on-running-economy-ecor-and-re/)

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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:** [4 March 2021 17:43 UTC](https://forum.intervals.icu/t/running-economy-ecor-and-re/3198/2 "2021-03-04T17:43:18Z")

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Need to get running power done first! Then I can look at this.

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**Author:** ![Michael\_Domokos](https://forum.intervals.icu/user_avatar/forum.intervals.icu/michael_domokos/32/4038_2.png) [@Michael\_Domokos](https://forum.intervals.icu/u/Michael_Domokos)\
**Post date:** [4 March 2021 18:42 UTC](https://forum.intervals.icu/t/running-economy-ecor-and-re/3198/3 "2021-03-04T18:42:21Z")

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👍 cool

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**Author:** ![Mattics\_Phi](https://forum.intervals.icu/user_avatar/forum.intervals.icu/mattics_phi/32/30176_2.png) [@Mattics\_Phi](https://forum.intervals.icu/u/Mattics_Phi)\
**Post date:** [26 April 2024 16:30 UTC](https://forum.intervals.icu/t/running-economy-ecor-and-re/3198/4 "2024-04-26T16:30:37Z")

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bumping this up, do we have a chart for this? this would be a cool metric to have. right now, i just have 30s power and pace overlapped to represent something similar. let me know if there is something else im missing, thanks!

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**Author:** ![David\_R](https://forum.intervals.icu/user_avatar/forum.intervals.icu/david_r/32/77808_2.png) [@David\_R](https://forum.intervals.icu/u/David_R)\
**Post date:** [26 April 2024 22:25 UTC](https://forum.intervals.icu/t/running-economy-ecor-and-re/3198/5 "2024-04-26T22:25:25Z")

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An ECOR chart can be made with a custom stream.

Something like:

```auto
{
  for (let m of icu.fit.record) {
    data.setAt(m.timestamp.value, m.RP_Power?.value / activity.icu_weight / m.enhanced_speed?.value)
  }
}

```

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**Author:** ![Mattics\_Phi](https://forum.intervals.icu/user_avatar/forum.intervals.icu/mattics_phi/32/30176_2.png) [@Mattics\_Phi](https://forum.intervals.icu/u/Mattics_Phi)\
**Post date:** [30 April 2024 03:34 UTC](https://forum.intervals.icu/t/running-economy-ecor-and-re/3198/6 "2024-04-30T03:34:25Z")

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Cool! I’ve never add a custom stream via code before (is that javascript?)

When creating a new activity stream, what do I put in for the “code” and “record field” fields? I"m assuming the units are “watts” and convert = “none”.

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**Author:** ![app4g](https://forum.intervals.icu/user_avatar/forum.intervals.icu/app4g/32/41800_2.png) [@app4g](https://forum.intervals.icu/u/app4g)\
**Post date:** [30 April 2024 05:01 UTC](https://forum.intervals.icu/t/running-economy-ecor-and-re/3198/7 "2024-04-30T05:01:27Z")

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> [@Custom activity streams with Javascript](https://forum.intervals.icu/t/custom-activity-streams-with-javascript/46416):
>
> Custom activity streams can now be computed using Javascript. You can access other streams, fields on the activity or athlete, wellness data and anything else needed. Click “Charts” under the activity timeline chart, then choose “Custom Streams”: Note that you need to enter a value for units. Here is a sample script to calculate power / HR (note that is one is built in so you don’t…