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RunningIt depends on how long and how hard. Here’s how to decide. · 2 min read · Updated September 30, 2026
How we made this guide: we built it from the research below and checked every number against it: ACSM, Academy of Nutrition and Dietetics & Dietitians of Canada joint position stand (2016).
There’s no single answer, but there is a simple way to decide: how long, and how hard.
| The run | Before it |
|---|---|
| Short and easy (under ~60 min) | Your call. Many runners feel fine with nothing, or with coffee and water. |
| Long (over ~60 min) | Carbs beforehand: 1–4 g/kg, 1–4 hours before. |
| Hard (intervals, tempo, races) | Carbs beforehand, even if the run is short. Quality sessions tend to go better fueled. |
Pre-exercise guideline from the ACSM joint position stand (Thomas, Erdman & Burke, 2016).
Eat less, closer to the run: a banana or a slice of toast with honey 30–60 minutes before works for many runners. Liquid carbs like juice are easier if your stomach is unsettled early.
Try a couple of options on easy days, and note what you ate and how the run felt. We built My Track Record so logging the meal and the run takes one spoken sentence each.
General information for healthy adult runners, not medical advice. If you have a medical condition, are pregnant, or have a history of disordered eating, talk to a doctor or registered dietitian before changing how you eat or use caffeine.