05/04/2026
Carb cycling sounds more complicated than it actually is. At its core, it’s just this:
- Eat more carbs when training is harder
- Eat less when training is easier
That’s it.
Carbs fuel intensity. They’re what allow you to run faster, push harder on the bike, and get quality out of sessions. So when people under-fuel hard sessions, performance drops, recovery slows, and the whole week ends up feeling harder than it should.
But here’s the bit most people miss…
Carb cycling isn’t required.
If you’re training a few times a week at a steady pace, you’ll get great results just eating balanced meals. It only really becomes useful when training gets more structured or more intense.
If you do use it, keep it simple:
- Higher carb days = intervals, tempo, long runs, long rides
- Moderate days = steady sessions or strength work
- Lower carb days = rest or very easy sessions
You’re fuelling the work you’re about to do, not rewarding what you’ve already done.
Timing matters as well:
- Hard morning session = carbs the night before + breakfast
- Hard evening session = carbs across the day
- Longer sessions = consider slightly higher carbs the day before
Then carbs during longer sessions as well of course when appropriate.
And for weight loss? It’s not magic. Fat loss still comes down to your overall calorie intake across the week. Carb cycling can help by giving you a bit more structure, eating slightly less on easier days and fuelling properly on harder ones, but it doesn’t replace the basics.
Personally, I don’t follow a strict carb cycling plan. I’ve tried it in a more structured way, but I now take a more flexible approach. If I’ve got a hard session or a long ride coming up, I’ll increase carbs the evening before and include them before and during the session as needed. On easier days, I just reduce portions slightly, which naturally brings carbs down without overthinking it.
It’s the same principle, just without turning nutrition for my training into a job!
This is exactly what I help people do with their training and nutrition. Whether the goal is weight loss, getting fitter, or improving performance for running or cycling, the focus is always on simple, realistic structure that fits around your life.
If you want a deeper dive, read my full blog. Go to:
https://www.simongpt.co.uk/carb-cycling-for-runners-cyclists-weight-loss/
A simple guide to carb cycling for runners and cyclists. Learn how to fuel training, improve performance and support weight loss.