# New TR feature - FTP estimate - thoughts **URL:** \ **Category:** Training\ **Created:** [December 28, 2021, 11:01am UTC](https://www.trainerroad.com/forum/t/new-tr-feature-ftp-estimate-thoughts/66927 "2021-12-28T11:01:27Z")\ **Posts on this page:** 1\ **Showing post:** 168
**Author:** ![Janhein](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/janhein/32/7721_2.png) [@Janhein](https://www.trainerroad.com/forum/u/Janhein)\ **Post date:** [January 15, 2022, 9:44pm UTC](https://www.trainerroad.com/forum/t/new-tr-feature-ftp-estimate-thoughts/66927/168 "2022-01-15T21:44:57Z")
> [@jjmc](#): > > It is ATs best guess at what your current fitness can handle. Would not call it a guess, it is a simple linear system to scale PL such that total kJs per workout (of the same duration) roughly remain constant before and after an FTP change. > [@jjmc](#): > > Interestingly, I’ve gotten decreases in PL with manual raises, but not increases with manual decreases. Yes, described that in the post below and seems to makes sense. Suppose you are struggling to complete workouts at a certain FTP and PL and want to reduce intensity. If you reduce FTP manually but AT would simultaneously increase your PLs and effectively keep you at the same total kJ per workout that would be pretty frustrating and lead to many complaints. > [@Under the hood of Adaptive Training: Analysis in four graphs](https://www.trainerroad.com/forum/t/under-the-hood-of-adaptive-training-analysis-in-four-graphs/62588): > > With the introduction of the Adaptive Training (AT) beta questions have been raised about the underlying algorithms. One recurring response has been to assume AT is a black-box controlled by artificial intelligence: It must be nice to be an AI and not have to explain yourself. Just spit out a result and produce a “new baseline. Trust it. Bleep!” But nobody does, yet. It’s going to take TR a long time to wean us off the explanations everybody is asking for. It feels counter-intuitive though t… --- _[View the full topic](https://www.trainerroad.com/forum/t/new-tr-feature-ftp-estimate-thoughts/66927)._