# ☕️ “I took caffeine” as additional option on the RPE survey (fine tune the individual AI model) **URL:** \ **Category:** TrainerRoad Software\ **Tags:** feature-request\ **Created:** [February 19, 2026, 9:06pm UTC](https://www.trainerroad.com/forum/t/i-took-caffeine-as-additional-option-on-the-rpe-survey-fine-tune-the-individual-ai-model/111326 "2026-02-19T21:06:46Z")\ **Posts on this page:** 7\ **Page:** 2
**Author:** ![Joe](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/joe/32/11680_2.png) [@Joe](https://www.trainerroad.com/forum/u/Joe)\ **Post date:** [February 21, 2026, 3:57am UTC](https://www.trainerroad.com/forum/t/i-took-caffeine-as-additional-option-on-the-rpe-survey-fine-tune-the-individual-ai-model/111326/21 "2026-02-21T03:57:01Z")
> [@KonaSS](#): > > Just google caffeine impact on cycling performance, tons of studies. [Effect of caffeine ingestion on time trial performance](https://pmc.ncbi.nlm.nih.gov/articles/PMC11155427/) > > It is one of the few really well documented supplements. 4-6 mg/kg is pretty big. More than I get from my morning total war anyway. Might try a double someday Joe ---
**Author:** ![KonaSS](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/konass/32/7725_2.png) [@KonaSS](https://www.trainerroad.com/forum/u/KonaSS)\ **Post date:** [February 21, 2026, 12:58pm UTC](https://www.trainerroad.com/forum/t/i-took-caffeine-as-additional-option-on-the-rpe-survey-fine-tune-the-individual-ai-model/111326/22 "2026-02-21T12:58:23Z")
I am not a daily caffeine user. I only take for key workouts/races. I can tell when I have taken it. It makes a difference. Can’t say I have bothered to try quantify the X%, seems futile outside of controlled study. Individual response varies by the person. But again, LOTS of studies that show that caffeine is an effective performance enhancing supplement. Fair for people to say “I have tried and don’t seem to be a strong responder,” but not sure why anyone would argue against the study results. ---
**Author:** ![KonaSS](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/konass/32/7725_2.png) [@KonaSS](https://www.trainerroad.com/forum/u/KonaSS)\ **Post date:** [February 21, 2026, 1:03pm UTC](https://www.trainerroad.com/forum/t/i-took-caffeine-as-additional-option-on-the-rpe-survey-fine-tune-the-individual-ai-model/111326/23 "2026-02-21T13:03:14Z")
Try harder 🤣 ---
**Author:** ![JoeX](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/joex/32/6640_2.png) [@JoeX](https://www.trainerroad.com/forum/u/JoeX)\ **Post date:** [February 21, 2026, 4:32pm UTC](https://www.trainerroad.com/forum/t/i-took-caffeine-as-additional-option-on-the-rpe-survey-fine-tune-the-individual-ai-model/111326/24 "2026-02-21T16:32:03Z")
> [@KonaSS](#): > > not sure why anyone would argue against the study results Because there’s a world of difference between studies and practice? If it’s so obviously true, I’m surprised that no one on these forums is able to measure it. Hopefully TR can shine a light… ---
**Author:** ![KonaSS](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/konass/32/7725_2.png) [@KonaSS](https://www.trainerroad.com/forum/u/KonaSS)\ **Post date:** [February 21, 2026, 6:07pm UTC](https://www.trainerroad.com/forum/t/i-took-caffeine-as-additional-option-on-the-rpe-survey-fine-tune-the-individual-ai-model/111326/25 "2026-02-21T18:07:19Z")
Again, one of the most studied performance enhancing substances…….where they measure it in **controlled** studies in labs………which is going to almost always be better than trying to measure this on your own in your basement…….used by professionals everywhere………. But maybe you are right. Maybe “big caffeine” is pulling the wool over my eyes, but I am going to believe the science here. ---
**Author:** ![JoeX](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/joex/32/6640_2.png) [@JoeX](https://www.trainerroad.com/forum/u/JoeX)\ **Post date:** [February 21, 2026, 6:54pm UTC](https://www.trainerroad.com/forum/t/i-took-caffeine-as-additional-option-on-the-rpe-survey-fine-tune-the-individual-ai-model/111326/26 "2026-02-21T18:54:35Z")
I think, that you think, I’m railing ‘against the science’ - I’m not. But let’s leave it at that eh? ---
**Author:** ![cassinonorth](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/cassinonorth/32/155501_2.png) [@cassinonorth](https://www.trainerroad.com/forum/u/cassinonorth)\ **Post date:** [February 22, 2026, 2:00pm UTC](https://www.trainerroad.com/forum/t/i-took-caffeine-as-additional-option-on-the-rpe-survey-fine-tune-the-individual-ai-model/111326/27 "2026-02-22T14:00:50Z")
This is interesting. I’d love a way to log my carb intake during exercise (a button to click “add intake” and ability edit after) would be far more useful thank a post-ride Garmin like survey where you just add the totals you took with no discerning when/how you took it in. Taking 75% of your nutrition after you already bonked at hour 4 is different than taking it nice and steady over the ride. [Previous page](https://www.trainerroad.com/forum/t/i-took-caffeine-as-additional-option-on-the-rpe-survey-fine-tune-the-individual-ai-model/111326.md?page=1)