Caffeine before running: how much and when

Your pre-run coffee has a dose and a timing. · 2 min read · Updated September 30, 2026

In short: Research doses of caffeine for endurance performance are about 3–6 mg per kg, roughly 60 minutes before. A table by body weight, what that is in coffee, and who should skip it.

How we made this guide: we built it from the research below and checked every number against it: ISSN position stand on caffeine and exercise performance (2021); EFSA, caffeine risk assessment (2015); FDA, how much caffeine is too much (2024).

Plenty of runners drink coffee before a long run out of habit. The research treats it as something with a dose and a timing.

The guideline

The ISSN position stand on caffeine (Guest et al., 2021) reports that caffeine consistently improves exercise performance at about 3–6 mg per kg of body weight, typically taken about 60 minutes before, with aerobic endurance showing the most consistent benefit. Higher doses mostly add side effects like jitters, a racing heart or stomach trouble.

Body weight	Starting dose (2–3 mg/kg, up to 200 mg)	Studied range (3–6 mg/kg, up to 400 mg)
110 lb	100–150 mg	150–300 mg
130 lb	120–175 mg	175–355 mg
150 lb	135–200 mg	205–400 mg
170 lb	155–200 mg	230–400 mg
190 lb	170–200 mg	260–400 mg

Start at the low end: benefits may come from doses as low as about 2 mg/kg. We cap the starting dose at 200 mg, the largest single dose the European Food Safety Authority found raises no safety concern for healthy adults, and the studied range at 400 mg, the daily amount the FDA says isn’t generally linked to negative effects for most healthy adults. Try any dose in training before race day.

What that is in coffee

An 8 oz cup of brewed coffee is often somewhere around 80–100 mg, but it varies a lot by bean, brew and café. A large café coffee can be two or three times that. If you use caffeine before races, practice with the same drink you’ll have on race morning.

Timing

Caffeine takes time to peak, so coffee on the way out the door hasn’t done much by the start. About an hour before is the studied timing.

Who should skip it

Skip it if caffeine doesn’t agree with you, if you’re pregnant or have a heart condition, or if you’ve been told to limit it. You don’t need caffeine to run well.

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.

Note what works

Write down when you had your coffee and how the run felt. We built My Track Record so logging the coffee and the run is one spoken sentence.

Keep track of what helps your runs.
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By Andrew, founder of My Track Record. Andrew has been active all of his life across a variety of sports and continues to stay active through climbing, swimming, weight training, golfing, snowboarding, and more. He built My Track Record so logging food and training takes one spoken sentence and can support any activity. He puts these guides together from published sports science research cited on each page. About Andrew

Sources

Guest NS, et al. International Society of Sports Nutrition position stand: caffeine and exercise performance. J Int Soc Sports Nutr. 2021;18:1. Source
European Food Safety Authority. Caffeine: EFSA explains risk assessment (2015), summarizing the EFSA NDA Panel’s Scientific Opinion on the safety of caffeine, EFSA Journal 2015;13(5):4102. Source
U.S. Food and Drug Administration. Spilling the beans: how much caffeine is too much? (2024). Source