Protein, Calories and Recovery
The nutrition fundamentals behind training: energy balance, protein for recovery, carbohydrates and fats, and what to eat around your sessions.
In short
- Energy balance decides which direction the scale moves; protein and continued training decide whether what you lose is fat or muscle. They are two separate questions.
- Around 1.4–2.0 g of protein per kilogram of body mass per day covers most people who train, rising toward 1.6–2.4 g during a deliberate fat-loss phase.
- Carbohydrate needs follow how much you train, not how much you want to weigh — and sessions past roughly 70–90 minutes benefit from fuelling during them.
- The thirty-minute anabolic window has not held up: a normal meal within a couple of hours after training is enough for almost everyone.
- Extremes fail because they end. A pattern you can hold for a year beats a perfect one you hold for three weeks.
On this page
- 1.Energy balance
- 2.Calories and training goals
- 3.Protein and muscle recovery
- 4.Protein during fat loss
- 5.Carbohydrates for training
- 6.Dietary fats
- 7.Pre-training nutrition
- 8.Post-training nutrition
- 9.Hydration
- 10.Nutrition for recovery
- 11.Avoiding unnecessary extremes
- 12.When professional nutrition advice may be appropriate
Energy balance
Almost everything in sports nutrition sits on one foundation: how much energy you take in against how much you use.
Take in more than you use over time and body mass tends to rise. Take in less and it tends to fall. Take in roughly what you use and it stays where it is. This is not a diet philosophy — it is the accounting underneath every diet philosophy, and the reason two people can succeed with completely different approaches.
What it does not tell you is what changes. The same deficit can cost you fat or cost you muscle depending on how much protein you eat and whether you are still training hard. That is the part the rest of this guide is about.
One honest caveat about the numbers you will meet: calorie estimates from apps, labels and fitness trackers all carry real error. Treat any figure as a starting point to be adjusted from what actually happens over two or three weeks, not as a measurement.
Calories and training goals
Your intake target follows from what you are trying to do, and the useful version is a range rather than a number.
- −Fat lossAbout 10–20% below maintenance
Manageable hunger, training mostly holds up · Roughly 0.5–1% of body mass per week
- =MaintenanceAround what you use
Weight stable across a fortnight · Performance, skill work, holding a hard block together
- +Muscle gainAbout 5–15% above maintenance
Sessions feel well-fuelled · Roughly 0.25–0.5% of body mass per week
Two notes on the extremes. A very aggressive deficit does not lose fat much faster; it mostly costs more muscle, more training quality and more adherence. And a large surplus does not build muscle much faster; muscle has a speed limit, and everything above it is stored as fat.
Weigh yourself in a consistent way, average the week, and judge over a fortnight. Day-to-day swings are mostly water, food in transit and salt.
Protein and muscle recovery
Training damages and stresses muscle. Protein supplies the amino acids that repair and rebuild it, and it is the single nutrient where athletes most often fall genuinely short.
For people training regularly, the widely cited range is 1.4 to 2.0 grams per kilogram of body mass per day. For a 70 kg athlete that is roughly 100–140 g. Strength and physique goals sit toward the upper half; endurance athletes doing high volumes need more than sedentary recommendations suggest, which is where the lower half fits.
Distribution matters too, though less than the daily total. Spreading protein across three to five meals of roughly 0.3–0.4 g per kilogram each — about 25–35 g for most people — appears to support the repair process better than eating almost none all day and a large amount at dinner.
Protein per meal
Breakfast
30 g — eggs and yoghurt
Lunch
35 g — chicken and rice
After training
30 g — shake and fruit
Dinner
25 g — fish and vegetables
Whole foods do this perfectly well: meat, fish, eggs, dairy, legumes, tofu and tempeh. Powder is a convenience, not a requirement — useful when a meal is not practical, and never the reason a day works. If protein is the part you want to go deeper on — which foods carry how much, how to hit the number plant-based, whether shakes are worth it — how much protein you really need covers exactly that, and this guide will not repeat it.
Rest days are not protein days off. Adaptation happens between sessions, which is exactly when the material is needed.
Protein during fat loss
Protein does its most valuable work in a deficit, where the body is looking for something to give up.
When energy is restricted, higher protein intakes help preserve lean mass and, as a side effect, help with fullness — protein is the most satiating of the three macronutrients. This is why recommendations during a deliberate fat-loss phase run higher, commonly 1.6 to 2.4 g per kilogram, with leaner people and larger deficits at the top of that range.
The second half of the answer is resistance training. Protein supplies the material; training supplies the reason to keep the muscle. A fat-loss phase with adequate protein and continued strength work looks very different, six weeks later, from one with neither.
Carbohydrates for training
Carbohydrate is the fuel your body prefers for anything at moderate or high intensity. Stored as glycogen in muscle and liver, it is what runs out in a long session — and running out is what "hitting the wall" describes.
Needs scale with how much you train, not with how much you would like to weigh:
| Training | Typical daily carbohydrate |
|---|---|
| Light: skill work, short easy sessions | About 3–5 g per kg |
| Moderate: around an hour a day | About 5–7 g per kg |
| Endurance: one to three hours a day | About 6–10 g per kg |
Most recreational athletes sit in the first two rows. The reason low-carbohydrate approaches often feel bad in the gym is not a myth: high-intensity work depends on glycogen, and the reduced-carb version of a hard interval session is simply a worse session.
Sessions longer than roughly 70–90 minutes benefit from carbohydrate during them — around 30–60 g per hour, from a drink, gel, banana or anything else you tolerate. Shorter sessions do not need fuelling at all.
Dietary fats
Fat is not the enemy and not optional. It supports hormone production, carries the fat-soluble vitamins A, D, E and K, and makes food taste like food, which matters more for adherence than any nutrient table shows.
A practical floor for athletes is around 20% of total energy, with most of it from unsaturated sources: olive oil, nuts, seeds, avocado and oily fish. Very low-fat diets are hard to sustain and can compromise hormone function; very high-fat diets tend to crowd out the carbohydrate that hard training depends on.
Fat is slow to digest, which is the one training-relevant consequence: a high-fat meal shortly before a session often sits badly. That is a timing issue, not a reason to avoid fat.
Pre-training nutrition
The goal before a session is straightforward: be fuelled, not full.
- Three to four hours before, a normal balanced meal with carbohydrate, protein and some fat.
- One to two hours before, something smaller and more carbohydrate-led — yoghurt with fruit, toast with honey, a bowl of oats.
- Under an hour before, something small and easy: a banana, a few dates, a sports drink if the session is long or hard.
Training fasted is fine for easy, short sessions if you prefer it, and it is not a fat-loss advantage in itself — total energy over the day is what decides that. For long or high-intensity sessions, eating beforehand usually produces a better session, and a better session is the thing you came for.
Rushed
Large lunch, nothing after
Six hours before training; flat by the third interval
Planned
Snack 90 min before
Oats and fruit; the last interval matches the first
Only the timing and size of the food around it moved. The session on paper was identical.
Post-training nutrition
After training, the priorities are replacing fluid, restoring glycogen and supplying protein for repair.
The much-repeated "anabolic window" of thirty minutes has not held up well. The response to protein is elevated for many hours after training, so a meal within a couple of hours is sufficient for almost everybody. Speed matters most in a narrow case: two hard sessions in the same day, where refuelling quickly is genuinely time-critical.
A reasonable post-session meal contains 20–40 g of protein alongside carbohydrate, in whatever form you will actually eat — chicken and rice, yoghurt with fruit and granola, eggs on toast, a shake and a banana if the kitchen is not an option.
If you trained fasted or the session was long, do not leave a large gap afterwards. Beyond that, what your whole day contains matters far more than how quickly the first bite arrived.
Hydration
Fluid loss impairs performance and concentration before you feel especially thirsty, and the effect is larger in heat.
Practical guidance that does not require a laboratory:
- Drink to thirst across the day, and check urine colour — pale straw is the target, not clear.
- For sessions under an hour, water is fine.
- For longer, hotter or heavily sweaty sessions, add sodium, through a sports drink, electrolyte tablet or simply salted food afterwards. Sodium is what you lose most of in sweat, and replacing fluid without it is less effective.
- Weighing yourself before and after a long session tells you your own sweat rate, which varies far more between people than any general recommendation admits.
More is not better. Drinking large amounts of plain water during very long events can dilute blood sodium, which is dangerous. Thirst plus sodium, not volume for its own sake.
Nutrition for recovery
Recovery is not a supplement category. It is mostly the same four things done consistently:
- Enough total energy. Under-fuelling is the most common cause of stalled recovery in recreational athletes, and it is usually accidental rather than deliberate.
- Enough protein, spread out. The daily total first, distribution second.
- Carbohydrate matched to the work. Glycogen that does not get restored shows up as a flat session two days later, not the same evening.
- Sleep. No eating pattern compensates for a chronic shortfall of it.
Fruit, vegetables and a varied diet cover the micronutrients involved in repair. There is no strong case for large antioxidant doses around training; some evidence suggests high supplemental doses may blunt part of the adaptation you trained for.
Alcohol deserves one line of its own: it impairs recovery, sleep quality and the muscle-repair response. It does not have to be eliminated, but a heavy night is a training cost and worth spending deliberately.
Avoiding unnecessary extremes
Most of what fails in sports nutrition fails because it was too extreme to keep doing.
- Very low calories cost training quality, muscle and, eventually, adherence — and the weight tends to come back with worse body composition than it left.
- Cutting an entire food group without a medical reason adds difficulty without adding results.
- Eating clean as an identity reliably drifts toward too little energy and an unhappy relationship with food.
- Bulking hard adds fat that has to be lost again, on the way to a slower rate of muscle gain than a moderate surplus would have produced.
- Chasing supplements while the basics are unfinished is the most expensive way to make no progress.
A pattern you can hold for a year beats a perfect one you hold for three weeks. That is not a compromise; over a year it is simply the better result.
When professional nutrition advice may be appropriate
This guide is general education, not medical or dietary advice for you personally. Some situations genuinely need qualified individual support, and recognising them early is part of training sensibly:
- A diagnosed condition affected by diet — diabetes, coeliac disease, kidney disease, an eating disorder, a food allergy.
- Pregnancy or breastfeeding.
- Persistent fatigue, repeated injuries, frequent illness, or — in women — a menstrual cycle that becomes irregular or stops. Together these can indicate chronically insufficient energy intake, which is a medical matter and not something to solve by training harder.
- Rapid unintended weight change in either direction.
- Competing in a weight-category sport, where making weight safely is a specialist job.
- A vegan or otherwise restricted diet combined with high training volume, where planning needs to be deliberate.
A registered dietitian or sports nutritionist is the right address. So is your doctor, especially where symptoms are involved.
Inside GetMyCoach, the nutrition side works from what you actually log rather than from assumptions. It reads only the days you tracked, says how confident it is, and gives you one prioritised action instead of a wall of findings — and "everything is covered" is an answer it is allowed to give. It works with no training plan at all, so you can use it purely to see what your week really looks like.
See what your own days actually contain
Log a few ordinary days and the GetMyCoach nutrition coach will show you where your energy and protein really sit — and, just as often, tell you that nothing needs changing.
Sources
- Thomas, Erdman & Burke — ACSM Joint Position Statement: Nutrition and Athletic PerformanceMedicine & Science in Sports & Exercise — the source of the protein, carbohydrate and fat ranges used here.
- Morton et al. — Protein supplementation and resistance training-induced gains in muscle mass and strengthBritish Journal of Sports Medicine — systematic review and meta-analysis.
- Schoenfeld & Aragon — How much protein can the body use in a single meal?Journal of the International Society of Sports Nutrition — on distributing protein across the day.
- Burke et al. — Carbohydrates for training and competitionJournal of Sports Sciences.
- ACSM — Position stand: Exercise and fluid replacementMedicine & Science in Sports & Exercise — on hydration, sodium and the risks of over-drinking.
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