Cravings After Training: Causes and Fixes

The session is barely in the log and you are standing in front of an open fridge, eating more than planned. Cravings after training are not a character flaw and not a question of discipline. They are the sum of empty glycogen stores, shifted appetite hormones, a fluid deficit and a day that was already too thin before the run. Once you understand the mechanics, you can steer them — with timing, quantity and a handful of rules that survive real life.

What happens in the body once the session ends

In intense or long sessions the body draws on muscle glycogen. After 90 minutes at a moderate pace, 40 to 70 percent of the stores are depleted depending on starting levels; after a hard interval session it is considerably more. Blood sugar drops at the same time, because the muscle keeps taking up glucose while counter-regulation via cortisol and adrenaline ramps up. That combination — empty stores, low blood sugar, high stress hormones — is the classic trigger for the impulse to eat immediately and a lot.

Then there is the hormonal side. Ghrelin, the appetite-stimulating hormone, rises after hard exercise; leptin, the satiety signal from fat tissue, responds more slowly and falls during a sustained energy deficit. Single sessions change this only marginally, but a chronic deficit over weeks shifts the feedback loops measurably towards more appetite — particularly for energy-dense, quickly available foods.

The third building block is the one most often missed: fluid. A loss of two percent of body weight in sweat — 1.4 litres for a 70-kilogram athlete — reduces performance and is partly misread by the brain as a hunger signal. If you eat first and drink later, you amplify the feeling. A glass of water with a pinch of salt before the meal is not esoteric; it is the fastest way to halve the signal.

Hunger, appetite, craving: three different things

The three terms get mixed up in everyday language but demand different responses. Hunger is physiological: a slowly building signal that a normal meal reliably switches off. Appetite is the desire for something specific — you are full but still want dessert. A craving is the sudden, highly specific urge for sugar or fat, often with the feeling of having no choice.

For endurance athletes the distinction matters because each has a different lever. Hunger after a long session is solved with quantity: carbohydrate, protein, volume. A craving is solved with structure: regular meals, enough protein across the day, no long fasting window after hard work. Treat both the same and you answer a catch-up signal with a snack — then wonder why the hunger is back twenty minutes later.

The six most common causes in endurance sport

• Too little energy across the day. The most common cause. Coffee for breakfast, a salad at noon and training in the evening means you start the run already in deficit. The craving afterwards is the invoice. Details on distribution are in post-workout nutrition.
• Too few carbohydrates during long sessions. Beyond roughly 90 minutes the body needs 30 to 60 grams of carbohydrate per hour to spare the stores. Take nothing and you come home empty — then eat twice what you missed on the run.
• Dehydration. Fluid loss is partly processed centrally as hunger. Drink 400 to 600 millilitres after the run, then eat — the order makes a measurable difference to satiety.
• Too much intensity in everyday training. Very hard sessions push cortisol and adrenaline up, which suppresses appetite first and brings it back stronger two to four hours later. That explains the late-evening craving after a hard evening session.
• Sleep debt. Too little sleep raises ghrelin and lowers leptin. At five to six hours per night over several days, calorie intake rises measurably — and the preference for sweet food grows. More in sleep and endurance performance.
• Habit and reward. The ritual of "something after the run" is learned. It does not disappear through bans but through a better version of the same ritual — a planned meal instead of a snack from the drawer.

The 60-minute rule: what belongs on the plate afterwards

The window right after training is not a myth, but it is not magic either. Glycogen synthesis runs faster in the first two hours than later, and muscle protein synthesis responds particularly well to a protein dose in that phase. In practice: a real meal within 60 to 90 minutes, not just a bar.

The amounts can be estimated from body weight. For most endurance athletes, 0.3 grams of protein per kilogram of body weight works — about 20 to 22 grams at 70 kilos — together with 0.8 to 1.2 grams of carbohydrate per kilogram, so 55 to 85 grams. If you ran fasted or were out for over two hours, go to the upper end. If you jogged easily for 45 minutes, no special treatment is needed; the next regular meal is enough.

Concretely on the plate: 150 grams of low-fat quark with 60 grams of oats and a banana; two slices of wholegrain bread with cottage cheese and tomatoes; an omelette from two eggs with potatoes from the day before; pasta with lentils and vegetables. The recipe is not the point — protein and carbohydrate arriving together is. A carbohydrate-only meal satisfies for less time and drops blood sugar faster, which is exactly the breeding ground for the next craving.

Five strategies that hold up in real life

• Eat before the session, don't only plan afterwards. A portion with 40 to 60 grams of carbohydrate two to three hours ahead prevents starting empty. If you run early, take a small carbohydrate breakfast or part of it the evening before.
• Prepare the meal before you leave. Cravings meet an empty fridge and zero decision energy. A prepared plate in the fridge is the single most effective measure there is.
• Drink first, eat second. 400 to 600 millilitres with a pinch of salt or an electrolyte drink, then wait five minutes. In many cases the hunger halves on that alone. More in hydration for running.
• Spread protein across the day. Three to four portions of 20 to 30 grams are considerably more satiating than one large portion in the evening. Dosage details are in protein for endurance athletes.
• No fasting window after hard work. Intermittent fasting and hard sessions combine poorly when the eating window excludes exactly the post-training phase. If you want both, place the session at the end of the window.

Common mistakes that make cravings worse

• A snack instead of a meal. A bar after 25 kilometres is no substitute for food. It lifts blood sugar briefly and drops it just as fast.
• Saving all day to eat in the evening. This pattern produces a craving that can no longer be controlled and encourages night-time eating.
• Replacing fluid with coffee. Caffeine suppresses appetite briefly but drives urination and fluid loss — and three hours later the hunger is bigger than before.
• Banning sweets entirely. Bans increase the urge. A planned portion inside a proper meal works better than the daily fight against the drawer.
• Mistaking cravings for weakness. Judging the signal morally leads to eating more later and sleeping worse. Reading it as information lets you fix the cause.

When cravings are a warning sign

Single episodes after long or hard sessions are normal and no reason for concern. It looks different when the pattern becomes permanent: daily cravings over several weeks, a performance drop at the same load, a resting heart rate five to ten beats higher, poor sleep and frequent infections. That combination points to a sustained negative energy balance or to overload — and neither resolves through willpower.

The opposite also happens: athletes with high training volumes who barely have an appetite and lose weight should check energy availability. The formula is (energy intake minus training expenditure) divided by fat-free mass; below 30 kilocalories per kilogram of fat-free mass counts as low availability. That is the core of RED-S, described in detail in RED-S and energy availability. If symptoms persist, medical assessment belongs in a doctor's hands, not in a food diary.

What this has to do with training planning

Cravings are often the most visible symptom of a week that wanted too much at once. Two patterns dominate: volume rose too quickly, or two hard sessions sit too close together. Both raise energy demand without intake growing with it — and both can be planned.

The second connection is underestimated: weekly training load (TSS) determines how much has to be eaten for recovery to happen at all. Peakora calculates the load after every session and combines it into fitness (CTL) and fatigue (ATL); the TSB value shows how much reserve the current week holds. In weeks with a rising TSB a larger appetite is physiologically correct — in deload weeks it should drop noticeably. If it stays high, that is a signal, not the rule. The basics are in the glossary under TSB and TSS.

If you want to work on weight in parallel, the systematic view is in race weight and body composition — including the limits beyond which a reduction costs performance instead of bringing it.

Frequently asked questions about post-training cravings

Why do I crave food after training?

Hard sessions empty glycogen stores, drop blood sugar and shift appetite hormones. On top of that, most athletes simply eat too little during the day. The craving is a catch-up signal from the body, not a lack of willpower.

What should I eat after a run to prevent cravings?

A real meal with protein and carbohydrate: about 0.3 grams of protein per kilogram of body weight plus 0.8 to 1.2 grams of carbohydrate per kilogram within 60 to 90 minutes. Add 500 to 750 millilitres of fluid with sodium.

Are cravings after exercise a sign of overtraining?

Not automatically. Single episodes after long or hard sessions are normal. Persistent cravings over weeks combined with a performance drop, poor sleep and frequent infections are a warning sign and should be assessed by a doctor.

Should I just ignore the craving?

No. Ignoring the catch-up signal usually means eating more than planned in the evening and sleeping worse. It works better to spread energy across the day and around the session than to fight the hunger.

Why do cravings often hit in the evening?

Because a daily deficit adds up: little breakfast, no meal after training, low blood sugar by evening. Once fatigue joins in, control drops exactly when the body demands fuel.