# Question about grey zone versus optimal with training not captured by intervals.icu **URL:** \ **Category:** Training\ **Created:** [20 January 2026 17:44 UTC](https://forum.intervals.icu/t/question-about-grey-zone-versus-optimal-with-training-not-captured-by-intervals-icu/120311 "2026-01-20T17:44:57Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![MedTechCD](https://forum.intervals.icu/user_avatar/forum.intervals.icu/medtechcd/32/40383_2.png) [@MedTechCD](https://forum.intervals.icu/u/MedTechCD)\ **Post date:** [20 January 2026 17:56 UTC](https://forum.intervals.icu/t/question-about-grey-zone-versus-optimal-with-training-not-captured-by-intervals-icu/120311/3 "2026-01-20T17:56:24Z")
Read the first posts in this thread and your OCD will be satisfied 😉 > [@FITNESS PAGE - a guide to getting started](https://forum.intervals.icu/t/fitness-page-a-guide-to-getting-started/17702/2): > > The Fitness page. [Fitness page icon] The Fitness page is without a doubt one of the most important pages because it gives you an immediate overview of the result from everything you’ve done in the past and, everything you’ve planned for the future. The Fitness and Form charts are the heart of the page and if you come from another software suite, you may know them as the PMC (Performance Management Chart). The terms Fitness/Fatigue/Form are used iso of the trademarked CTL/ATL/TSB ™. The idea a… --- _[View the full topic](https://forum.intervals.icu/t/question-about-grey-zone-versus-optimal-with-training-not-captured-by-intervals-icu/120311)._