How quickly should I eat after a long run?

Target a recovery shake or light meal within 30 minutes of finishing for maximum glycogen resynthesis benefit. The first 30 minutes post-exercise have the highest GLUT-4 transporter activity — a state that triples glycogen synthesis rate compared to the rested state. Consuming 60–80g of carbohydrates and 20–30g of protein in this window maximises the acute recovery response. Follow with a full meal 1–2 hours later.

How many carbohydrates do I need after a long run?

Target 1.2g of carbohydrates per kg bodyweight within 30 minutes of finishing, followed by another 1.0–1.2g/kg at the 2-hour mark. For a 70kg runner completing a 2-hour run, this means approximately 84g of carbohydrates in the first 30 minutes and 70–84g more at the 2-hour meal. Total carbohydrate intake for the full recovery day should be 8–10g/kg to fully replenish glycogen stores for the next training session.

Is chocolate milk actually a good post-run recovery drink?

Yes — chocolate milk provides an approximately 3.5:1 carbohydrate-to-protein ratio, around 400–500 kcal per 500ml serving, natural sodium and calcium, and whey + casein protein that delivers both fast and slow amino acid release. Multiple RCTs show chocolate milk produces equivalent or superior recovery outcomes to commercial protein shakes at a fraction of the cost. It remains one of the most practical and evidence-supported post-long-run recovery options available.

Post-Long-Run Nutrition: What to Eat After a 2-Hour Run

The long run — whether 16km, 26km, or 32km — is the most physiologically demanding session in endurance training. Unlike shorter workouts where partial glycogen depletion and minimal muscle damage allow rapid recovery, long runs create compounding challenges: near-total glycogen depletion, significant muscle protein breakdown, elevated inflammation, and immune suppression that can persist for 24–72 hours. Getting post-long-run nutrition right compresses this recovery window and determines your readiness for the next quality session.

What the Long Run Actually Depletes

A 2-hour run at 65–70% VO2max depletes approximately 250–400g of muscle glycogen (depending on pace and body size), consuming virtually all glycogen stored in the working muscles. Liver glycogen — the primary buffer for blood glucose maintenance — is also substantially depleted, with a 90-minute run reducing liver glycogen by approximately 75%. Beyond glycogen, the eccentric loading of running (muscle contracting while lengthening on landing) causes Z-disk disruption in Type I and Type II muscle fibres, releasing intramuscular proteins into the bloodstream — serum creatine kinase (CK) and myoglobin peak at 24–48 hours post-long-run and can remain elevated for 72 hours after particularly demanding long runs or downhill courses.

The Glycogen Resynthesis Window

Glycogen resynthesis rates are highest in the first 30–60 minutes post-exercise when muscle cell membranes are maximally permeable to glucose (GLUT-4 transporters are active independent of insulin during this period). Consuming 1.2g/kg of fast-digesting carbohydrate immediately post-run maximises glycogen synthesis rate at approximately 7–8 mmol/kg muscle/hour. This rate is 3× higher than in the rested state. Waiting 2+ hours to eat reduces this rate by 50% as the GLUT-4 advantage fades. For a 70kg runner: target 84g of carbohydrates within the first 30 minutes of finishing the long run.

The Protein Priority

Co-ingesting protein with carbohydrates post-long-run enhances muscle protein synthesis, blunts post-exercise muscle protein breakdown, and amplifies the insulin response that drives glycogen uptake. The optimal post-long-run protein dose is 30–40g of high-quality protein containing at least 2–3g of leucine — the essential amino acid that directly activates the mTOR pathway driving muscle repair. Whey protein is superior to plant proteins in leucine content (10–11% vs 6–8% leucine) and absorption speed, making it the optimal post-run protein source when rapid delivery is the priority. For plant-based athletes, a combination of pea and rice protein or soy protein achieves comparable leucine density.

Practical Recovery Meal Timing

The optimal post-long-run strategy uses two feeding windows:

Immediate (0–30 minutes): Fast-digesting liquid recovery: 60–80g simple carbohydrates + 20–30g whey protein. Chocolate milk (500ml) provides a near-perfect 3.5:1 carbohydrate-to-protein ratio naturally, or a recovery shake combining maltodextrin/dextrose with whey protein. Liquid is preferred in the immediate window due to likely appetite suppression and faster gastric emptying compared to solid food.
1–2 hours post-run: Substantial recovery meal: 80–120g complex carbohydrates (rice, pasta, sweet potato, bread) + 30–40g protein (chicken, fish, eggs, tofu) + vegetables for micronutrient density. This second feeding sustains glycogen synthesis and provides the second muscle protein synthesis peak that optimises recovery over the next 12–24 hours.

Electrolyte Replacement Post-Long-Run

Long runs in moderate or warm conditions can produce sweat losses of 1.5–3.0 litres, carrying significant sodium (600–1,800mg depending on sweat sodium concentration), potassium, and magnesium. Post-run meals should contain salt — salty food actively promotes rehydration by maintaining the osmotic drive to drink. An electrolyte drink or tablet in the immediate post-run window (alongside the recovery shake) speeds rehydration relative to plain water alone. Avoid plain water-only rehydration after long runs exceeding 2 hours — replacing volume without sodium reduces plasma osmolality and blunts the drive to retain fluid. The NorthLine Sweat Rate Calculator will give you a precise post-run fluid replacement target, and the Race Day Nutrition Planner structures total carbohydrate and protein targets for long-run training days to ensure the whole day's nutrition supports the demands of your training block.

Nutrition