# Whats the most important data to look for? **URL:** \ **Category:** General\ **Tags:** athletica\ **Created:** [October 20, 2024, 3:12pm UTC](https://forum.athletica.ai/t/whats-the-most-important-data-to-look-for/2154 "2024-10-20T15:12:20Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![the-primal-swede](https://forum.athletica.ai/user_avatar/forum.athletica.ai/the-primal-swede/32/266_2.png) [@the-primal-swede](https://forum.athletica.ai/u/the-primal-swede)\ **Post date:** [October 20, 2024, 3:12pm UTC](https://forum.athletica.ai/t/whats-the-most-important-data-to-look-for/2154/1 "2024-10-20T15:12:20Z")
I suspect there should be a tutorial or something? Did a quick search, found none. If there is, I appreciate links etc 🙂 The thing is, Im preparing for a 96K ultra trail run, Sandsjöbacka here in south west Sweden, 18/1, in the depth of winter. Very fun indeed. I expect very low temperatures, and mostly running in darkness. My question is: I want to get more in-depth in Athletica. What would you say are the most crucial data to look for? What are the numbers you always check? Appreciate all advice, Cheers! Erik ---
**Author:** ![Prof](https://forum.athletica.ai/user_avatar/forum.athletica.ai/prof/32/28_2.png) [@Prof](https://forum.athletica.ai/u/Prof)\ **Post date:** [October 21, 2024, 2:32am UTC](https://forum.athletica.ai/t/whats-the-most-important-data-to-look-for/2154/2 "2024-10-21T02:32:41Z")
Hi Erik, For me, as an athlete and coach, I like to look at. 1. Aerobic decoupling - how close is the number to zero on any given submax effort. Ratio of pace/power to heart rate. How efficient is the internal cardiovascular system (red) meeting the external demands (blue). 2. Workout Reserve (green) - how hard am I working from an external load perspective relative to the past (6 weeks). Want to do work that continues to push this out. That way I know I’m adapting myself for what I need to accomplish in the future. For your particular context, I would also use some subjective work around cold adaptation. I know myself that my tolerance gets better and better on ski days in minus 20 where I live but I have to repeat the exposure. If I don’t and just have a once out exposure I would be in trouble. Good luck! Paul ![Screenshot 2024-10-20 at 7.25.37 PM](https://forum.athletica.ai/uploads/default/original/2X/2/2dad63c884c1b34d4b020c4424a2215e13b93db0.png) ---
**Author:** ![the-primal-swede](https://forum.athletica.ai/user_avatar/forum.athletica.ai/the-primal-swede/32/266_2.png) [@the-primal-swede](https://forum.athletica.ai/u/the-primal-swede)\ **Post date:** [October 21, 2024, 7:02pm UTC](https://forum.athletica.ai/t/whats-the-most-important-data-to-look-for/2154/3 "2024-10-21T19:02:58Z")
Hi Paul, Ok thanks. Might have some follow up questions. Will study the platform more 🙂 Stay strong! ---
**Author:** ![SimpleEnduranceCoach](https://forum.athletica.ai/user_avatar/forum.athletica.ai/simpleendurancecoach/32/1591_2.png) [@SimpleEnduranceCoach](https://forum.athletica.ai/u/SimpleEnduranceCoach)\ **Post date:** [October 24, 2024, 6:35pm UTC](https://forum.athletica.ai/t/whats-the-most-important-data-to-look-for/2154/4 "2024-10-24T18:35:32Z")
Erik, to add on to what Paul says, for my athletes, I also look at the overall load and compliance since that gives me a wide picture of how well they did the workout. I also look at the Efficiency Factor to see that it is generally increasing with similar workouts. I also look at the HR response to the interval or work load to make sure the response makes sense given the work. Finally, I look at Total Work in kJ to help my athletes make sure they’re eating enough. If they do a really long, hard day with a large Total Work, for example, I might send them a note to remind them eat enough to refuel. I check all these things to make sure nothing seems wonky or wrong, that everything makes sense. The Workout Reserve, as Paul mentioned, gives me a final sense of how hard the workout may have felt. ---
**Author:** ![Fabien](https://forum.athletica.ai/user_avatar/forum.athletica.ai/fabien/32/1036_2.png) [@Fabien](https://forum.athletica.ai/u/Fabien)\ **Post date:** [October 27, 2024, 5:53pm UTC](https://forum.athletica.ai/t/whats-the-most-important-data-to-look-for/2154/5 "2024-10-27T17:53:02Z")
That’s such an interesting thread! I started to take a look to both compliance and aerobic decoupling. Compliance seems to to stay the same where aerobic decoupling lean to go down (~%5 to ~4%). Would you take it as a signal that I should slow down my pace further (this is based on my Sunday long run)? I usually tend to aim for the top of BPM bracket of the workout, but not it make me wonder if I should reconsider. The KJ is such a good one. I tend to pay more attention to my nutrition pre/durring workout but don’t really pay attention otherwise 😬 ---
**Author:** ![the-primal-swede](https://forum.athletica.ai/user_avatar/forum.athletica.ai/the-primal-swede/32/266_2.png) [@the-primal-swede](https://forum.athletica.ai/u/the-primal-swede)\ **Post date:** [November 2, 2024, 10:04am UTC](https://forum.athletica.ai/t/whats-the-most-important-data-to-look-for/2154/6 "2024-11-02T10:04:20Z")
Thanks for input I notice I have WR for running sessions, but not cycling. Is that how its meant to be or am I missing something? Cheers! Erik ---
**Author:** ![Prof](https://forum.athletica.ai/user_avatar/forum.athletica.ai/prof/32/28_2.png) [@Prof](https://forum.athletica.ai/u/Prof)\ **Post date:** [November 2, 2024, 5:08pm UTC](https://forum.athletica.ai/t/whats-the-most-important-data-to-look-for/2154/7 "2024-11-02T17:08:45Z")
Thanks @the-primal-swede … that could be a bug and I’ve reported it.