Nutrition
Meal timing
The anabolic window, breakfast, eating late and meal frequency — what the evidence supports once total daily intake is held constant, which is not much.
Meal timing is where fitness advice has historically been most confident and least supported. Almost every rule you have heard — eat every three hours, never train fasted, protein within thirty minutes — turns out to be a small effect or no effect once total daily intake is controlled for.
That is worth knowing, because these rules impose real costs on people’s lives and deliver very little.
The anabolic window is hours, not minutes
The thirty-minute post-workout window is the most durable myth in the gym.
It came from real research, but research done in fasted subjects. If you train having not eaten since the previous evening, a post-workout meal matters — because the important variable is how long you have gone without protein, not the workout itself.
For someone who ate lunch two hours before training, that urgency is already satisfied. When protein timing studies are pooled and total daily protein is held constant, the timing effect disappears.
Eat protein within a few hours either side of training and you have done everything the evidence supports.
Distribution is a real but small effect
There is a modest case for spreading protein across three or four feedings of 25 to 40 grams rather than skewing most of it into dinner.
Muscle protein synthesis responds to a dose of protein and then becomes refractory for a few hours, so several stimuli across a day produce a slightly better response than one large one. The effect is real and it is small.
Apply it after you are reliably hitting your daily total. Someone eating 90 grams a day perfectly distributed is doing considerably worse than someone eating 160 grams badly distributed.
Meal frequency does not change metabolism
The claim that six small meals “stoke the metabolic fire” has been tested and does not hold.
The thermic effect of food — the energy spent digesting — is proportional to how much you eat, not to how many sittings you divide it into. Eating 2,000 calories across six meals and across three costs the same to process.
What frequency does affect is appetite, and that is individual. Some people find frequent small meals keep hunger manageable; others find they are never satisfied and do better with two or three substantial ones. Both are correct.
Eating late is not the problem
Calories consumed in the evening are not metabolised differently.
The association between late eating and weight gain is real in observational data, but the mechanism is behavioural rather than metabolic. Evening eating tends to be additional eating — the snacking that happens in front of a screen after a full day of meals, rather than a meal that replaces one earlier.
If your evening meal fits your daily intake, the clock is not working against you.
What actually matters
Hit your daily protein. Hit your calorie target. Eat in a pattern you can maintain when work is busy and you are tired, because that is the condition under which diets are actually won or lost.
Everything else in this article is a refinement worth perhaps a few percent, and only once the fundamentals are boring and automatic.
Common questions
Does meal timing matter for building muscle?
Far less than total daily protein. Meta-analysis of protein timing studies found that once daily intake is matched, the timing effect disappears. Spreading protein across three or four feedings is a small optimisation worth doing after you are reliably hitting your total, not before.
Is the anabolic window real?
It exists but it is hours wide, not thirty minutes. The idea came from studies in fasted subjects, where a post-workout meal genuinely matters because the previous meal was a long time ago. If you ate within a few hours of training, you are already covered.
Does eating late at night cause fat gain?
Not by itself. Calories eaten at 9pm are not stored differently from calories eaten at noon. Late eating correlates with weight gain mostly because evening eating tends to be additional eating — snacking on top of the day rather than instead of part of it.
How many meals a day should I eat?
Three to five, chosen by preference. The old claim that frequent small meals stoke metabolism does not hold up: the thermic effect of food scales with how much you eat, not how many sittings you split it across. Pick the pattern you can keep.
Should I eat before or after training?
Whichever suits your digestion and schedule. Training fasted is fine for most sessions and slightly limits performance in long or very hard ones. If you train early and cannot eat first, prioritise a protein-containing meal afterwards.
Keep reading
More in fundamentals.