Recovering between five events in 20 minutes: why the window right after each event decides your carbohydrate refilling.
The honest answer first: what you eat between events and how you recover often decides your day more than the training you did the week before. A decathlon day lasts six to eight hours on site, with five events and often only 20 to 30 minutes between them — a completely different load than a single event that's over in minutes.
Sports science is clear here: the window right after exertion — roughly the first 30 minutes to 2 hours — is most effective for refilling your carbohydrate stores, because glycogen resynthesis runs fastest in that phase. Between two decathlon events, you're almost always inside exactly that window — miss it, and you go into the next explosive event with half-empty tanks.
Concretely that means: 1 to 1.2g of carbohydrate per kilogram of body weight right after a demanding event — at 75kg body weight that's roughly 75 to 90g, about one large banana plus half a liter of sports drink. Fast-available carbs like glucose, maltodextrin or sports drinks work more effectively here than heavy, fat-rich meals that hit your stomach too late.
And between the two competition days, a second thing matters: a complete, protein-rich meal right after the day's last event, to kick-start overnight recovery. Train Smart. Play Hard. — in decathlon that means: recovery isn't a break from the competition, it's part of it.
The moment an event ends, reach for fast carbs immediately — not once the next warm-up phase starts. The first 30 minutes after exertion are most effective for glycogen resynthesis, and that's almost automatically the window you get between events.
As a guideline, 1 to 1.2g of carbohydrate per kilogram of body weight right after exertion. Work this out once for your weight and prepare it as a fixed amount — for example a banana plus a gel — for every break.
The longest break of the day often falls between the morning and afternoon events. Use it for an easily digestible but complete meal instead of more bars — your body needs more than pure quick energy here.
Right after the day's last event, the most important recovery phase before day 2 begins. A meal with both carbohydrates and protein kick-starts glycogen refilling and muscle repair at the same time.
Too little fluid and energy across six to eight hours of competition raises your injury risk in the later events — tired muscles react more slowly and protect joints less well. Drink regularly, even without feeling thirsty, especially on warm competition days.
Listen for warning signs like dizziness, nausea or unusual cramping between events — those are signs of insufficient energy or fluid, not signs of poor fitness. When in doubt, talk to the on-site competition doctor.
Test your entire fueling strategy in training beforehand, never for the first time on competition day. Some sports drinks or gels sit differently with different stomachs under load.
A trick often overlooked: build yourself a short, always-identical ritual for the transition between events — for example drink, then eat, then three deliberate breaths. That gives your head a clear switch from one event to the next, regardless of how the previous one went.
Fast-available carbs like bananas, energy bars or sports drinks, roughly 1 to 1.2g per kilogram of body weight right after every demanding event. Heavy, fat-rich meals fit better into the midday break than into short ten-minute windows.
Very important — across six to eight hours of competition you lose fluid continuously, even without strong thirst. Drinking regularly between events protects against performance drops and higher injury risk in the later events.
A complete meal with carbohydrates and protein, as soon as possible after the last start. That kick-starts both glycogen refilling and overnight muscle recovery — important, because the next event is already waiting the following morning.
With a fixed, short ritual between events — for example drink, eat, take a few deliberate breaths. That separates the previous event mentally from the next one, whether it went well or badly.
Decathlon: The 400m and 1500m in Context