Most endurance athletes are quick to track pace, heart rate and power, but when it comes to fueling many leave it to guesswork. The truth is, that’s holding you back. Whilst training breaks your body down, fueling is what drives adaptation and builds you back up. Without enough of the right nutrition, your body simply can’t absorb the benefits of the hard work you’re putting in.

Why Fuel Shouldn’t Be Left to Chance

Professional athletes know this. They don’t just track their watts and splits, they also micromanage every gram of carbohydrate, protein and fluid. Not because they’re obsessive, but because they understand that fueling is as important as the training itself. Yet many age-group athletes skip this step. They’ll plan their long runs and bike intervals down to the minute, but when it comes to food it’s a shrug and a ‘that’ll do.’ The result? Inconsistent recovery, missed adaptations and performance plateaus. And it’s not just opinion - research backs this up. A recent study published in the Scandinavian Journal of Medicine & Science in Sports showed how a ‘one-size-fits-all’ approach to nutrition fails in the real world.

The Tech Has Made It Simple: Meet Hexis

The good news? You don’t need a pro-level support team to get this right. The tools are already available and one such tool is Hexis - an AI powered nutrition app that brings elite level science into everyday use.

Powered by what Hexis calls its Carb Coding™ system, the app analyses billions of data points - your training load, lifestyle, body goals - and creates a personalized fuel plan, minute by minute.

It integrates seamlessly with wearables and platforms like TrainingPeaks, syncing your workouts directly into your fuel calculations
Users see real improvements - in fact, intelligent fuelling strategies like those offered by Hexis show an average performance increase of around 9.8% within four weeks
The app makes logging meals easy (with a database of over a million foods, barcode scanning, and quick logging features) and provides insights into energy balance throughout the day.

Hexis: Nutrition Technology for Human Performance

Training + Fuel = Adaptation

Think of it like this: training is the signal, but fuelling is the switch that allows your body to respond. Without fuel the signal gets weaker. With the right fuel, your body adapts - faster, stronger, fitter. So the question becomes: if pros know this and build their entire routines around it, why would everyday athletes leave it to chance? Especially when the tech to track and improve is right there, waiting to be used.

The Bottom Line

If you care about getting the most out of your training, start treating nutrition like the performance metric it is. Try an app like Hexis to get a personalized, adaptive fueling plan.

Log your meals for a week and track your energy intake against your training load.
Notice how recovery and performance improve when you remove guesswork.

Bevan McKinnon / August 2025

Links

Personalized Nutrition for the Enhancement of Elite Athletic Performance study at https://onlinelibrary.wiley.com/doi/10.1111/sms.70044

Hexis at https://www.hexis.live/

Fuel Smarter, Train Smarter: Why Tracking Nutrition Matters