About
Why I built Athmex
I’m Lee, a very amateur triathlete, and the person who built Athmex. I use ChatGPT and Claude for training help, but I wanted them to know me as an athlete before I asked the next question.
The problem wasn’t information. It was re-explaining.
A new chat meant typing my current training paces, PBs, target race, goals, injuries, equipment and preferences before I could ask a useful question.
ChatGPT seemed like a natural fit, and early on it genuinely was. I could get useful answers, but only after rebuilding the same athlete briefing in the chat.
Why generic memory wasn’t enough
It forgot selectively. One conversation lost my race plan; the next remembered an old injury or used a stale PB as if it were current. I could not tell which version of me it was working from, so I stopped trusting the advice even when it was probably right.
The frustrating part was that the answers were often excellent right after I had pasted everything in. The missing piece was a reliable, athlete-controlled memory.
Why Athmex exists
So I built the thing I actually needed. That’s Athmex.
Coaching myself
I’ve never been able to justify paying for a proper coach, so I’ve always coached myself.
A Strava tab and a ChatGPT chat
Screenshot the last few sessions, paste them in, remember to mention the goal race and where I was in the build, then ask the question.
Memory that forgot selectively
Some chats lost everything. Others held onto the wrong things: an old injury, a PB from months ago. I stopped trusting the advice.
Building what I needed
A place to keep my profile, paces, PBs, goals, races, injuries, equipment and preferences, so ChatGPT and Claude could read them instead of me retyping them.
Six months on my own training
Every session and every question to Claude built on my actual data, kept current.
Athmex today
A tool for runners, cyclists and triathletes who want their AI to remember the details that make their training personal.
If you want to see the training behind it, you can follow me on Strava.
What Athmex is now
Athmex keeps your athlete profile, goals, races, PBs, thresholds, injuries, equipment and preferences ready for ChatGPT or Claude. The assistant does the coaching. Athmex doesn’t produce the advice itself: it gives the AI you already use the context to make that advice more relevant, and lets you update or revoke what it can access.
Your activity data stays with your training platform and reaches the assistant through that platform’s own route. See how it works, or tell me what would make it more useful.
Give your AI the athlete it’s talking to.
Build your athlete profile once and use it with ChatGPT or Claude.
You. Your fitness. Your activity data. Together in Claude and ChatGPT.