Endurance & Marathon Fueling Playbook

A framework for fueling long training blocks without under-eating on hard days.

Who this is for: Runners and endurance athletes building toward a race or a long training block.

1
Raise your calorie target on long-run days
Use the Meal Architect’s custom calorie target to build a higher-calorie day specifically for your long-run or high-volume days.
2
Lean into carbs during peak training weeks
Endurance training blocks generally need more carbs than a general-health target, adjust your macro split accordingly during peak weeks.
3
Don’t under-fuel recovery days
It’s common to over-restrict on rest days, keep protein consistent every day regardless of training load.
4
Track fatigue against intake
If energy is crashing mid-training-block, check your logged trend first, chronic under-fueling is a common, fixable cause.

Ready to run this playbook?

For yourself

Track your own meals, free

Snap a photo of your plate and see calories and protein. No card needed.

For trainers, dietitians and gyms

Try it with your clients

See what they eat and whether they trained, every day. 14 days free, no card. Clients use it free.