Cycling race-day fuel plan
Cycling is the endurance discipline that tolerates the highest carbohydrate intake without GI stress, the seated position and zero impact allow 100-120 g/h in trained athletes. In 4-6h granfondos, nutrition is literally half the result.
Carb strategy in cycling
Crit or short road race (<90 min): 30-45 g/h. Granfondo 80-100 km (2-3h): 60-80 g/h. Granfondo 150 km+ (4-6h): 80-100 g/h with 2:1 blend. Ultra cycling (250 km+): 90-120 g/h, rotating gels, carb drinks, bars and real food. Cycling is the only context where 120 g/h is tolerable for most athletes after 2-4 weeks of gut training.
Drinks vs gels
In cycling, drinks are the most efficient vehicle. A 750 ml bottle with 60-80 g carbs covers an entire hour, and you sip continuously, which helps gastric emptying. Gels become secondary: 1 every 60-90 min as variation or caffeine boost. In races with limited aid stations, carry 2-3 bottles + 3-4 gels + 1-2 bars in jersey pockets.
Caffeine in cycling
Cycling is the discipline where caffeine shows the most consistent benefit. Dose: 3-6 mg/kg, 30-60 min pre (Guest 2021 ISSN position stand). In long events (4h+), top up with 1-2 mg/kg every 2h. Gels with 100 mg caffeine are the most practical format. Do not scale dose without testing, if you have never used it, start at 3 mg/kg in training first.
How to mix your bottle: 80-100 g/h recipe without GI stress
Base homemade recipe: 80 g maltodextrin + 40 g fructose + 1 g table salt + half a lemon juice + 700 ml water, in a 750 ml bottle. Result: 120 g of carbs at 2:1 ratio with osmolarity below 300 mOsm/L (empties fast from the stomach, no osmotic pull). Cost: around 0.30 EUR per bottle vs 2-3 EUR for commercial ready-to-drink. Commercial drink has the advantage of always tasting the same and being nutritionally correct, but knowing how to mix your own frees you from limited aid stations in rural granfondos or self-supported ultra cycling.
Fueling in cold (<10°C) vs hot (>25°C) races
Cold: gastrointestinal blood flow stays normal, but you lose thirst perception (dangerous). Keep caloric intake regular because the body spends extra heating itself. Warm drinks in the first hours (tea with honey + salt) prevent the gut shutdown that happens in alpine early-morning races. Heat: splanchnic flow reduced up to 60% as blood diverts to the skin. Lower carb concentration in the drink to 5-6% instead of the typical 8-10%. Double sodium to 600-1000 mg/h. Pre-race ice slurry (crushed ice + 50 g carbs) reduces core temperature by 0.5°C before the start and delays thermal cutoff (Tan 2023).