The recovery window starts at the finish line and stretches for a week. What you eat in the first 30 minutes shapes how you feel tomorrow. What you eat in the first 24 hours shapes how fast you can return to training. Most runners get the first part right and completely whiff the second.

The one-sentence answer

1.2 g of carbohydrate per kg of bodyweight plus 20–40 g of protein within 30–60 minutes. Repeat at 2 hours. Rehydrate at 1.5× the body mass you lost. Real meals for the next 24–48 hours.

The 30-minute window

Muscle glycogen synthesis rates double in the 30–60 minutes following glycogen-depleting exercise. GLUT4 transporters are already at the cell surface from the workout; eating fast carbs while the machinery is upregulated refills glycogen at roughly 2× the resting rate. Add protein (10–20 g) to amplify the response and start muscle protein synthesis.

Practical: a recovery shake, chocolate milk, or a banana plus a sports drink. If solid food is too hard, drink the calories.

When the stomach is closed

Post-marathon GI shutdown is common — anything from “not hungry” to full nausea. The fix is liquid: chocolate milk (high carb + casein + whey), salted broth, recovery shake mixed thin. The 30-minute window bends but does not break — getting calories in by 90 minutes captures most of the benefit.

The 2-hour real meal

Once the stomach is willing, eat. Template: 1–1.5 g carbs per kg of bodyweight, 20–40 g protein, some salt, a small piece of fruit, and 500 mL of fluid. Examples:

  • Rice + grilled chicken + soy sauce + orange juice
  • Pasta with tomato sauce + meatballs + bread + sports drink
  • Burger + fries + cola (the classic; works well)

Rehydration math

Replace 150% of body mass lost over the next 4 hours. If you lost 2 kg during the race, drink 3 L over 4 hours — slowly, paired with sodium. Plain water without sodium just makes you pee it out. Hyponatremia risk drops sharply once you stop running, but sodium is still required to hold fluid in extracellular space; see our sodium and electrolytes guide for replacement targets.

Day-after, week-after

Day 1: normal meals, no fiber blowouts. Hydrate to clear urine.

Day 2–3: protein-forward. 1.5–2 g protein/kg/day to support muscle repair.

Day 3–7: reintroduce fiber, return to baseline diet. Iron-rich foods (red meat, lentils, dark leafy greens) help; long races can transiently drop iron status.

Alcohol caveat: the finish-line beer does not ruin recovery if you have eaten and rehydrated first. Skip if you have not. Multiple drinks across recovery night impair glycogen synthesis by up to 40% and delay return to training.

What recovery does not need

  • Mega-doses of antioxidants — blunt the training response
  • Cold plunges immediately after — slow protein synthesis at the moment you want it firing; wait 4+ hours
  • Aggressive stretching of fatigued muscles — micro-tear risk
  • BCAAs or fancy supplements — whole food + protein covers this

Red flags — see a doctor

  • Dark cola-coloured urine 24 hours out (rhabdomyolysis)
  • Persistent nausea past 24 hours
  • Calf swelling or sharp pain (DVT)
  • Confusion or new headache (delayed hyponatremia)

Returning to training

The reverse-taper rule (zero running for one day per mile raced) is outdated. Modern recovery research supports easy 30–45 minute jogs starting day 2–3 and a gradual return to full volume over 2–3 weeks. Use perceived recovery, not a calendar, to guide return.

Frequently asked questions

Beer at the finish line? If you have eaten and rehydrated, one is fine.

Ice bath before or after eating? After. Eat first, dunk later — and wait at least 4 hours post-race to avoid blunting protein synthesis.

Massage timing? 24–48 hours post-race. Same-day deep tissue can worsen muscle damage.

When can I run again? Day 2–3 for easy 30 min jogs; full training in 2–3 weeks. Listen to perceived fatigue, not the calendar.

What about the next race? Plan it. The principles in our carb-loading guide and marathon fueling guide apply to the next one.