# Analyze Durability now live

**URL:** <https://forum.aiendurance.com/t/analyze-durability-now-live/174>\
**Category:** Announcements\
**Created:** [July 8, 2026, 3:39pm UTC](https://forum.aiendurance.com/t/analyze-durability-now-live/174 "2026-07-08T15:39:07Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![MarkusRummel](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.aiendurance.com/markusrummel/32/8_2.png) [@MarkusRummel](https://forum.aiendurance.com/u/MarkusRummel)\
**Post date:** [July 8, 2026, 3:39pm UTC](https://forum.aiendurance.com/t/analyze-durability-now-live/174/1 "2026-07-08T15:39:08Z")

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You can now see your durability, the loss of performance after a given amount of work (in cycling kJ kilo Joule and in running kilometers) in the Data page:

- decrease in power duration curve as a function of kJ/km; we also show you your loss in CP and Endurance Power/Pace
- drift of heart rate, DFA a1, and respiration frequency as a function of kJ/km

Both together quantify your durability and while the external power duration curve efforts require a maximal effort (both fresh and fatigued) for a reliable measurement of durability, the internal efforts do not and hence let us collect much more data on your durability from regular/non-test protocol rides.

Similar to how AI Endurance detects thresholds today (combo of external CP measurements + internal DFA a1 thresholds), the combination of external and internal methods gives us a reliable snapshot of your durability at any given time and moving forward lets us optimize durability as part of your training plan options (coming soon).

 ![aiendurance.com_en_dashboard_data (5)](https://canada1.discourse-cdn.com/flex003/uploads/aiendurance/original/1X/1de8949f091255ec6dd37184e6ee7f949734a2a2.jpeg)

 ![aiendurance.com_en_dashboard_data (6)](https://canada1.discourse-cdn.com/flex003/uploads/aiendurance/original/1X/acf6a2885cdab256ee97afd76d269eb006d856e6.jpeg)

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<div class="post-metadata">

**Author:** ![R\_Handle](https://avatars.discourse-cdn.com/v4/letter/r/57b2e6/32.png) [@R\_Handle](https://forum.aiendurance.com/u/R_Handle)\
**Post date:** [July 9, 2026, 2:21pm UTC](https://forum.aiendurance.com/t/analyze-durability-now-live/174/2 "2026-07-09T14:21:21Z")

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Cool. Is durability being used as an optimization metric when creating training plans / weekly review yet, or is it “just” an analysis/information tool for the moment?

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<div class="post-metadata">

**Author:** ![MarkusRummel](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.aiendurance.com/markusrummel/32/8_2.png) [@MarkusRummel](https://forum.aiendurance.com/u/MarkusRummel)\
**Post date:** [July 9, 2026, 2:39pm UTC](https://forum.aiendurance.com/t/analyze-durability-now-live/174/3 "2026-07-09T14:39:26Z")

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for now just display but working on it 🙂

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<div class="post-metadata">

**Author:** ![MarkusRummel](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.aiendurance.com/markusrummel/32/8_2.png) [@MarkusRummel](https://forum.aiendurance.com/u/MarkusRummel)\
**Post date:** [August 21, 2026, 4:02pm UTC](https://forum.aiendurance.com/t/analyze-durability-now-live/174/4 "2026-08-21T16:02:56Z")

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Activity page now displays the activity’s durability relative to last 6 week data:

 ![image](https://canada1.discourse-cdn.com/flex003/uploads/aiendurance/original/1X/331013a193e77b58c7c9df554609d1b8334d2a39.png)

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<div class="post-metadata">

**Author:** ![R\_Handle](https://avatars.discourse-cdn.com/v4/letter/r/57b2e6/32.png) [@R\_Handle](https://forum.aiendurance.com/u/R_Handle)\
**Post date:** [August 21, 2026, 7:34pm UTC](https://forum.aiendurance.com/t/analyze-durability-now-live/174/5 "2026-08-21T19:34:10Z")

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This helps put the numbers into perspective, thanks.