How much to eat and drink on a ride: carbs, fluid, sodium, calories
Raises the ceiling to 120 g/h. Only if you already handle high intakes in training.
These are general planning guidelines, not medical advice. Individual tolerance, sweat rate and weather vary widely — high carb intakes need a trained gut. Listen to your body.
It depends on duration: under an hour you can skip eating, 1–2 h aim for 30–60 g/h, beyond 2.5 h go 60–90 g/h, and in a race with a trained gut up to 90–120 g/h. Above 60 g/h you need a glucose+fructose mix, or absorption hits the single-transporter limit.
Aim for 400–800 ml per hour, more in the heat, in small sips every 10–15 minutes rather than all at once. Fluid needs sodium too: 300–800 mg per litre, higher in heat and for salty sweaters. Don't drink beyond thirst without sodium — that risks hyponatremia.
Usually not. Glycogen stores in muscle and liver cover roughly 60–90 minutes of moderate effort, so water is enough for a short ride. Carbs start to matter once the ride runs long or the intensity is high.
Your gut only absorbs a limited amount of carbs per hour (about 60 g from one source, up to 90–120 g from a mix), while cycling can burn 500–1000 kcal/h. So fueling only covers part of the burn — the rest comes from stores, and that's fine. The goal is to delay the bonk, not erase the deficit.