Published Mar 21, 2023 · Updated Jun 22, 2026
We explain how AI Endurance uses ChatGPT to help guide your triathlon, running and cycling training.
Update (2026): Since this post was written, two things have changed. Our in-app coaching chat, the daily check-in conversation that talks you through your recovery and motivation, now runs on a newer large language model for faster, higher-quality coaching. And AI Endurance is now available as a ChatGPT app, so you can plan and adjust workouts from inside ChatGPT directly. The principles below, combining our sport-specific number models with generative AI, still describe exactly how AIE works.
ChatGPT is an AI chatbot that is based on the generative pre-trained transformer (GPT) family of large language models (LLMs) from OpenAI. It can perform impressive tasks such as
just to name a few. This article is written by a human, by the way.
We embedded ChatGPT into our existing features for maximal benefit to your training routine. Our aim is to combine the strengths of our own AI models that are very specific to triathlon, running and cycling with the strengths of general LLM such as ChatGPT. Our own AI Endurance models are not language based like ChatGPT but 'number based' AI models. Combining the two approaches gives you as the user the best of both worlds:
A predictive AI to create the optimal personalized training plan and adaptations for you and an encouraging AI coach to gauge your sentiment and guide you through the numbers.
One thing that is hard to analyze in a 'number based model' is your sentiment. Your sentiment in this context can be your general motivation to train, your mental state, or general information about your life and/or training.
During your daily check in you can inform us via the 'How do you feel about exercising today? Tell AI Coach' dialog. ChatGPT is very capable in analyzing your sentiment. We use its verdict when we make decisions if you should go ahead with your training as planned, or if it may be better to skip or modify the workout of the day.
Informing us about your sentiment is particularly useful if it would otherwise be a blind spot for our recovery model. For example, a particular mental state such as 'Work is really stressful right now' may or may not show up in your recovery data. With this feature however, you can always let us know whatever it may be that might be going on at any given time.
Of course your sentiment doesn't have to be negative. You can also let us know if things are going well. The reality is we all have bad days and we want to protect you against training too much or under the wrong circumstances as much as possible.
Example statements you could submit may be
or
There's a lot of data that flows into our personalized recovery model.
The soreness of your different muscle groups for triathlon, running and cycling:
Your cardiovascular recovery:
ChatGPT can give you a comprehensive summary of your recovery parameters and put these in the context of your overall triathlon, running or cycling training plan:
ChatGPT can put the triathlon, running or cycling workout planned for the day into context and explain its benefits:
Similarly, it can explain why a rest day may be a good idea and come up with ideas for active recovery:
This may be the most important one: explain why a training plan modification has been made. To be clear, the decision if and when a training plan adaptation is proposed is based on the numbers. ChatGPT can help put things into context and explain to you why. Ultimately, it's up to you to accept or reject these proposed modifications.
To summarize, at AI Endurance we use our custom numbers based models for triathlon, running and cycling together with a general LLM like ChatGPT for an optimal training experience. ChatGPT's impressive capabilities are already enabling features that would have been hard to imagine just a few months ago. We are just at the beginning of AI revolutionizing the triathlon, running and cycling world.
We show you in a few simple steps how to connect Suunto Guides with your AI Endurance account. You can get live workout instructions that are optimized to you by our AI. You can also easily determine your training zones and thresholds via a simple ramp test that utilizes your heart rate variability (HRV) data.
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Power meters are costly and we often can't afford one on every bike we own. AI Endurance calculates cycling power from activities without a power meter using heart rate, cadence and DFA alpha 1. The results are generally more accurate than speed based estimates such as Strava's estimated power. All you need is a heart rate monitor and ideally a cadence sensor on your bike and AI Endurance will estimate your power for every ride.
