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Recovery nutrition: eating to bounce back between sessions

An evidence-based guide to eating for recovery — the part of training that happens at the kitchen table rather than in the gym. It covers refuelling your muscles' carbohydrate stores, giving them protein to repair, replacing the fluid and salt you sweated out, and — just as importantly — the honest truth about how much post-workout timing really matters for most people. Practical, grounded in sports-nutrition consensus, and free of the "anabolic window" panic.

Here's the whole thing in one sentence: recovery nutrition means refilling glycogen with carbohydrate, repairing muscle with protein spread across the day, and replacing lost fluid and sodium — but for most people training once a day, your total daily intake and your sleep matter far more than eating within any magic window. Everything below is the detail behind that: the numbers, where they come from, and — crucially — when the clock actually matters and when it doesn't.

On this page

  1. What recovery nutrition is actually for
  2. Refuelling — carbohydrate and glycogen
  3. Protein — repair, per feed and per day
  4. Rehydration — fluid and sodium
  5. Does timing matter? The window, honestly
  6. Putting it together
  7. Common questions
  8. Takeaways

A framing note before the numbers. Sports nutrition is well studied, but people differ enormously — body size, how hard and how often you train, the weather, your diet and your health all shift what's right on the day. So this is written as can, tends to and around, never as a guarantee, and every specific figure is a population-level guide drawn from published consensus, not a personal prescription. It's general education, not medical or dietary advice, and it isn't a personalised plan. This guide is the nutrition half of recovery; the sleep, rest-day and stress side is covered in the recovery-and-rest guide.

What recovery nutrition is actually for

Training is a stress: it drains fuel, causes small amounts of muscle damage, and loses you fluid and salt through sweat. Recovery nutrition is simply putting those four things back — fuel, the raw material for repair, water and electrolytes — so you turn up to your next session ready rather than depleted. That's the entire job. Three jobs, really: refuel (carbohydrate), repair (protein), and rehydrate (fluid and sodium).

But here is the honest headline that most of the internet buries: how urgently you need to do any of this depends almost entirely on how soon you train hard again. If your next tough session is the next morning — or the day after — your body has hours and hours to sort itself out from ordinary meals, and precise post-workout timing barely registers. The urgent, stopwatch-driven version of recovery nutrition only really applies to a narrow group: people training twice a day, or with another hard effort within a few hours. Keep that distinction in your head as you read the numbers below, because it's the single thing that decides whether they matter for you.

Common misconception → correct it. "If I don't nail my recovery meal right after every workout, the session was wasted." For the vast majority of people — anyone training roughly once a day with a normal gap before the next hard effort — this simply isn't true. Recovery happens across the whole day (and overnight), so what your total daily food and sleep look like matters far more than whether you ate in the first 30 minutes. The stopwatch only starts mattering when your recovery window is genuinely short.

Refuelling — carbohydrate and glycogen

Hard exercise burns through glycogen — the carbohydrate your muscles and liver store as their fast fuel. Refuelling is the job of putting that back, and carbohydrate is what does it. The pace you need to refuel at is set, once again, by your turnaround.

Fast turnaround (another hard session within a few hours, or twice-a-day training). Here speed genuinely matters, and there's a well-established target. Research on rapid recovery, reflected in the joint position on nutrition and athletic performance from the Academy of Nutrition and Dietetics, Dietitians of Canada and the American College of Sports Medicine, describes taking in carbohydrate at around 1.0–1.2 g per kilogram of body weight per hour during the first few hours after exercise to refill glycogen as quickly as possible. The muscle is most receptive to restocking soon after you stop, and the resynthesis rate is fastest in the first hour or two — so frequent small feeds (roughly every 15–30 minutes) work better than one big sitting when you're racing the clock.

Normal turnaround (a full day or more until the next hard session). This is where most people actually live, and the good news is that you can relax. When you have a day or more, you don't need to chase the clock at all — simply meeting your usual daily carbohydrate intake across normal meals refills muscle glycogen comfortably, typically within about 24 hours. A common everyday guide for someone doing about an hour of training a day is around 5–7 g of carbohydrate per kilogram of body weight per day, rising with heavier training loads. Hit that across your normal meals and your tank tops itself back up long before you need it.

Common misconception → correct it. "I have to slam carbs the moment I finish or my glycogen won't refill." Only if you're training again within hours. The fast-refuel rate of ~1.0–1.2 g/kg/h exists specifically to squeeze a day's worth of refilling into a few hours for people with a short turnaround. Given a normal day between sessions, muscle glycogen refills fully on ordinary meals — the early window buys speed you don't need, not a bigger total. Total daily carbohydrate is what refills the tank; timing just decides how quickly.

Protein — repair, per feed and per day

Where carbohydrate refuels, protein repairs: it supplies the amino acids your body uses to rebuild and adapt the muscle that training stresses. Two numbers matter here, and it helps to think about them in the right order — per day first, then per feed.

Per day. The International Society of Sports Nutrition's position stand puts a daily target of roughly 1.4–2.0 g of protein per kilogram of body weight per day for people training regularly — a good deal more than a sedentary person needs, because exercise increases the demand for repair and adaptation. Within that band, endurance-leaning training tends to sit nearer the lower end (about 1.4–1.7 g/kg), while strength training and actively building muscle sit nearer the top (about 1.6–2.0 g/kg, and some evidence supports up to ~2.2 g/kg). This daily total is the single most important protein number for recovery.

Per feed. Rather than eating that total in one or two big hits, you get more out of it by spreading it across the day. The evidence suggests a feed of about 0.25–0.4 g of protein per kilogram of body weight — very roughly 20–40 g for many people — maximally stimulates the muscle's repair machinery per sitting, and that repeating that feed every three to four hours across roughly four meals tends to support muscle better than an uneven distribution. In practice, that means a palm-or-two of protein at each of your regular meals, one of which naturally falls after training. Older adults appear to need the upper end of the per-feed range to get the same effect. For the full picture on protein, the how-much-protein guide goes deep.

Common misconception → correct it. "There's a cap on protein, so anything over ~30 g in a meal is wasted." Overstated. A single feed of around 0.25–0.4 g/kg maximally stimulates muscle protein synthesis in that sitting, but protein above that isn't flushed away — it's still digested and used for other jobs, and the extra amino acids stay available. The practical takeaway isn't "never eat more"; it's that spreading protein across the day is a more efficient way to build and repair muscle than saving it all for dinner.
Strathlon sport-day nutrition view showing the day's calorie and protein targets raised after a training session is logged
Strathlon's sport-day nutrition view: when you log a session, the day's calorie and fuel targets adjust so a hard training day is met with more food — the practical version of "put back what you used."

Rehydration — fluid and sodium

Sweat is water plus salt, so replacing it means replacing both. Again, urgency depends on the situation: if you finished a session only mildly down on fluid and have the rest of the day ahead, drinking to thirst alongside normal meals sorts it out. It's the fast, sweaty turnaround — a hot session with another effort soon after — where a deliberate approach pays off.

When you need to rehydrate quickly, the American College of Sports Medicine's position on exercise and fluid replacement advises drinking around 1.5 times (about 150% of) the fluid you lost. Why more than you lost? Because taking on a big fluid load makes you produce more urine, so some of what you drink is lost again — the extra covers that. Just as important, that fluid should carry sodium: salt helps your body hold onto the water rather than pee it straight out, and helps restore what you sweated. Everyday food is salty enough that a normal meal does much of this job for you; it's the rapid, high-sweat-loss case where an electrolyte drink or salted food earns its place.

How do you know how much you lost? Weigh yourself before and after a hard session in representative conditions: each kilogram of body mass lost is roughly a litre of sweat. That single habit turns rehydration from a guess into a number — if you're a kilo down, you lost about a litre, and a rapid recovery would aim for roughly 1.5 litres of fluid with some sodium over the following hours. The hydration-and-electrolytes guide covers sweat rate and electrolytes in full.

Common misconception → correct it. "Rehydrating means drinking as much water as possible." Two problems. First, plain water without any salt is easy to pee straight back out, so you rehydrate less completely than you think — which is exactly why sodium matters. Second, drinking far more than you lost isn't safer: over-drinking can dilute blood sodium (hyponatraemia), a rare but serious problem. Aim to replace most of what you lost, with salt, not to drown the deficit.

Does timing matter? The window, honestly

This is the section that separates useful recovery advice from marketing. The famous "anabolic window" — the idea that you must eat protein and carbs within 30 to 60 minutes of finishing or the session is squandered — has been examined closely, and it doesn't survive first contact with the evidence. A well-known review of nutrient timing concluded that the window of opportunity around training is much wider and looser than the myth claims, plausibly on the order of several hours rather than minutes, and that total daily intake is the more decisive factor than the precise clock time of any single feed.

What that means in practice depends on you:

And the quiet giant in all of this is sleep. The largest daily recovery window isn't the hour after your workout — it's the night's sleep that follows, when much of the body's repair and adaptation happens. Chronically short sleep works against everything on this page. If you're weighing where to spend effort, "sleep enough and eat enough overall" beats "optimise the 30 minutes after training" for almost everyone. The recovery-and-rest guide covers that side in depth, and the pre- and post-workout nutrition guide looks specifically at the meals around a session.

Common misconception → correct it. "Miss the post-workout window and you lose your gains." This is the tidiest, most-repeated recovery myth, and it's wrong for most people. The window is hours wide, not minutes, and it's dwarfed by your daily totals and your sleep. The stopwatch matters only when you genuinely train again soon. For everyone else, chasing the window is effort spent on the smallest lever while the biggest ones — total intake, protein spread, sleep — sit unattended.

Putting it together

Strip away the noise and recovery nutrition is refreshingly simple. Here's the whole thing as a decision, not a ritual:

Your situation Carbohydrate Protein Fluid
Once a day, full day until next hard session (most people) Just hit your daily target across normal meals (~5–7 g/kg/day for ~1 h training); no rush. Hit ~1.4–2.0 g/kg/day, spread in ~0.25–0.4 g/kg feeds every 3–4 h. Drink to thirst with normal (salted) meals.
Fast turnaround: again within hours, or twice a day ~1.0–1.2 g/kg per hour for the first few hours, in frequent small feeds. A prompt feed of ~0.25–0.4 g/kg alongside the carbs. ~1.5× the fluid lost, with sodium; weigh before/after to know the loss.

Notice that the top row — where most people spend their training lives — has no stopwatch in it at all. The urgent numbers are real, but they're tools for a specific job (a short turnaround), not daily obligations. If you train once a day, the winning move is boring and effective: eat enough overall, get protein at each meal, drink to thirst, and sleep. Everything else is fine-tuning at the margins.

Where Strathlon fits. Strathlon is built to keep the part that actually matters — your daily totals — honest, instead of leaving you to guess. When you log a session through + Add activity on the Plan tab (or Add activity), the app adjusts that day's calorie and fuelling targets so a hard training day is met with more food than a rest day, rather than treating every day the same. Its tips lean on your goal and sport, so guidance tilts toward fuelling and recovery when you've trained hard, and the tracker keeps your protein and energy for the day in view. Strathlon won't micromanage a 30-minute window for you — because for most people that window barely matters — but it keeps the daily base, the thing that genuinely drives recovery, easy to hit.

Common questions

How soon after training do I actually need to eat?

For most people training once a day, there is no rush. When you have a full day or more before your next hard session, research on nutrient timing suggests the post-exercise window is far wider than the old 30-minute myth — on the order of several hours — and that hitting your total daily carbohydrate and protein matters more than precise timing. Speed only becomes important when the next hard session is within a few hours or you train twice a day; then getting carbohydrate in quickly helps refill glycogen before you go again.

How much protein should I eat to recover and repair muscle?

Think per day first, then per meal. Position stands put a daily target of roughly 1.4–2.0 g of protein per kilogram of body weight for people training regularly — nearer the lower end for endurance work, nearer the upper end for strength or muscle-building. To use that protein well, spread it across the day in feeds of about 0.25–0.4 g per kilogram (roughly 20–40 g for many people) every three to four hours, rather than piling it into one meal. A feed after training fits neatly into that pattern, but it is the daily total and the spread that do the work.

How much carbohydrate do I need to refill glycogen after a workout?

It depends entirely on your turnaround. If your next hard session is within a few hours, research on rapid recovery describes taking in carbohydrate at around 1.0–1.2 g per kilogram of body weight per hour for the first few hours, ideally in frequent small feeds, to refill glycogen as fast as possible. If you have a full day or more, there is no need to rush the clock — simply meeting your normal daily carbohydrate target across meals restores muscle glycogen comfortably, usually within about 24 hours.

How much should I drink to rehydrate after exercise?

If you finished a session meaningfully down on fluid and need to recover quickly, sports-medicine guidance is to drink around 1.5 times (about 150% of) the fluid you lost, because some of what you drink is lost as urine — and to include sodium, which helps you hold onto it. You can estimate the loss by weighing yourself before and after: each kilogram lost is roughly a litre of sweat. If you have the rest of the day to recover, drinking to thirst alongside normal meals and their salt is usually enough.

Do I need a protein shake immediately after my workout?

No. The idea that gains are lost unless you drink a shake within 30 minutes doesn't hold up — the useful window around training appears to be several hours wide, not minutes. A shake is simply a convenient way to hit your daily protein target, not a magic trigger. For someone training once a day and eating enough protein overall, whether that protein arrives as a post-workout shake or as a normal meal an hour or two later makes little difference; sleep and total daily intake matter more.

Does adding protein to my post-workout carbs refill glycogen faster?

Not once your carbohydrate intake is already high. When you are taking in carbohydrate at the recommended rapid-recovery rate of roughly 1.0–1.2 g per kilogram per hour, adding protein does not clearly speed glycogen refilling. Older studies suggested protein might partly compensate when carbohydrate intake is below that optimal rate, but more recent pooled analyses find no clear added glycogen benefit from protein once carbohydrate is adequate. The protein is still worth having for muscle repair — just don't expect it to substitute for eating enough carbohydrate when a fast turnaround is the goal.

Takeaways

If you remember one thing, make it this: for most people, recovery nutrition is won at the level of the day, not the minute. Eat enough overall, get protein at each meal, drink to thirst with normal salty food, and sleep — and save the stopwatch for the rare days you truly train twice. Strathlon's role is to keep that daily base honest by adjusting your targets around the sessions you actually log, so the part that matters is one less thing to guess at.

This is general educational information, not medical, dietary or coaching advice. The sports-nutrition figures here are drawn from established consensus and are framed as population-level guides — individual needs vary widely with body size, training load, conditions and health, and are best personalised with a qualified professional. Anyone with a health condition, a history of disordered eating, kidney disease, or who is pregnant or postpartum, should consult a registered dietitian or physician before making changes. See our Terms for more.

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