Mid-Run Nutrition for the Half Marathon

Half marathon fueling should start before you feel empty. Many runners do well with 30 to 60 grams of carbohydrate per hour, delivered through gels, chews, sports drink, or a mix. Practice the timing in training, take fuel with water when possible, and keep the plan simple enough to execute at race effort. That timing protects your final miles.

Decide if you need fuel

If you finish under about 75 minutes, breakfast and a small pre-race carb may be enough. If you race 90 minutes or longer, mid-run carbohydrate usually helps. For many runners between those ranges, one gel or sports drink can support the final 5K without creating much stomach risk.

Use simple timing options

1. One-gel plan: take one gel around 35 to 45 minutes.
2. Two-gel plan: take gels around 30 to 35 minutes and 65 to 75 minutes.
3. Sports-drink plan: sip enough to reach your carb target without overdrinking.
4. Caffeine plan: use only if tested, often in the second half of the race.

Train your gut

Gut training means practicing fuel while running, not just tasting it at home. Use long runs with race-pace sections, tempo workouts, or progression runs to test timing. Note whether you need water, which flavors sit best, and whether caffeine helps or makes you jittery.

Avoid common fueling mistakes

• Waiting until you feel weak before taking your first gel.
• Taking a gel without water when your stomach needs dilution.
• Combining multiple gels and full-strength sports drink without counting carbs.
• Trying a new brand, caffeine dose, or chew texture on race day.
• Skipping breakfast and expecting one gel to cover the whole race.

A half marathon does not require complicated nutrition, but it does reward planning. Choose products you tolerate, set times or mile markers, and rehearse the sequence. When fueling is automatic, you can spend the final miles competing instead of negotiating with your stomach.