What to do the day before a half marathon

The day before a half marathon should be calm, simple, and routine-focused. Prioritize light movement, familiar food, hydration, and getting everything ready so race morning feels easy.

Food and drink

Eat normal, carb-friendly meals made from foods you already know work well for you. Keep fiber, heavy fats, and very spicy foods on the lower side so your stomach stays predictable.

• Have breakfast, lunch, and an early dinner that are easy to digest.
• Choose familiar carbs such as rice, pasta, potatoes, bread, oats, or a bagel.
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• Keep sipping water through the day instead of chugging a huge amount at once.
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• Avoid trying new supplements, foods, or drinks for the first time now.
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Training and movement

If you run, keep it very easy and short. A 15–30 minute shakeout jog with a few strides is enough for many runners, but a rest day is also completely fine if that is what your body likes.

• Do an easy shakeout run only if it helps you feel loose.
• Skip hard workouts, long runs, or anything that leaves your legs tired.
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• Use light stretching, mobility, foam rolling, or a short walk instead of extra training.
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Logistics to handle

Take care of the small details so nothing feels rushed in the morning. Lay out your kit, pin your bib, charge your watch if needed, and confirm your travel time to the start. [6][3] [4][3] [9][1][7]

Task	Why it helps
Set out clothes, shoes, socks, bib, and gels	Reduces stress and prevents forgotten gear
Check start time and route to the race	Helps you arrive early and calm
Plan breakfast and race- morning snacks	Keeps your routine predictable
Review weather and pack layers	Makes race morning easier to manage

Sleep and mindset

Try to get to bed at a normal time, but do not panic if sleep is a little restless. The bigger goal is to stay relaxed, keep screens and stress low, and trust the work you already did in training.

• Keep the evening quiet and low-key.
• Avoid last-minute “fitness testing” or overthinking your pace.
• Remind yourself that one calm day can help more than one perfect meal or workout.
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Simple day-before checklist

1. Eat familiar, carb-based meals.
2. Drink steadily through the day.
3. Do a short shakeout run or rest.
4. Lay out all race gear.
5. Confirm travel, bib, and start time.
6. Get an early, relaxed night.

TL;DR: Keep the day before a half marathon boring in a good way: eat familiar foods, hydrate, move lightly, prep your gear, and rest.

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