Nutrition during training and racingBanana, bar or cheese sandwich?

Jan Timmermann

 · 23.06.2025

Whether liquid or solid: cyclists need carbohydrates to keep the engine running.
Photo: Igor Schifris

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Cyclists need the right source of energy to maximise their performance on long tours and in competitions. We have analysed six energy sources and clarified whether bars, gels, bananas or cheese sandwiches are more suitable. As a lack of fluids quickly leads to exhaustion, we also explain the most important drinking tips.

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If the tour lasts three, four or even more hours, a cyclist burns thousands of calories. There are many ways to replenish the energy consumed. However, not all of them are equally suitable for high levels of exertion. Carbohydrates are the fuel that best keep the body going during anaerobic endurance performances. The cellular power stations in the muscles then require large quantities of these macronutrients. While amateur cyclists can consume around one gram of carbohydrates per kilo of body weight in one hour of riding, trained competitive athletes can consume up to 120 grams in the same time. To avoid digestive problems, cyclists should have practised consuming these quantities well before they start a marathon race. Incidentally, it is assumed that the best athletes can store up to 600 grams of carbohydrates in their bodies. However, they also burn around 100 grams per hour of cycling. We have taken a detailed look at the six most common sources of carbohydrates for cyclists.

Energy bar

With a weight of 50 grams, a Energy bar in about 60 grams of carbohydrates. With chocolate icing and an oatmeal base, fat and fibre ensure that the energy enters the bloodstream a little later. If you only use bars, you risk an additional stressful rollercoaster ride for your blood sugar levels. Professionals therefore tend to use solid energy sources in the early stages of the race and then switch to liquid form.



Every cyclist has probably bitten into one of these at some point. Energy bars are the most common form of refreshment on the road.Photo: PowerbarEvery cyclist has probably bitten into one of these at some point. Energy bars are the most common form of refreshment on the road.

Gel

30 grams of a Gels can provide around 20 grams of carbohydrates. Whether passion fruit or espresso: flavour and handling are not everyone's cup of tea and should be tested during training. Even the most advanced gel is useless in a jersey pocket. Gels are always easier to swallow than a bar. Ideal for the final push to the finish.

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Green apple with caffeine: the taste of gels is polarising. They have become an integral part of the professional camp.Photo: NutrixxionGreen apple with caffeine: the taste of gels is polarising. They have become an integral part of the professional camp.

Banana

The banana is known as "nature's cheap energy bar" and is easy to swallow even under load. A medium-sized banana weighing 115 grams contains around 27 grams of carbohydrates. Its various types of sugar provide a steady supply of energy for a long time but are not as intense as bars or gels. Potassium and magnesium help the muscles to work. Three quarters of a banana consists of water.

Yellow, delicious, full of water, carbohydrates and other nutrients: the banana is nature's energy bar. And best of all, the packaging is compostable.Photo: Adobe StockYellow, delicious, full of water, carbohydrates and other nutrients: the banana is nature's energy bar. And best of all, the packaging is compostable.

Cheese bread

This picnic classic is a favourite snack on tour. Depending on the bread and topping, there are 15 to 35 grams of carbohydrates per 100 grams of cheese bread. The energy from white bread is quickly available, but also quickly used up. Cheese and butter contain a lot of fat, delay the absorption of carbohydrates and are not recommended during high exertion. But: Good flavour can also have a performance-enhancing effect.

Delicious, isn't it? The cheese roll is probably Germany's favourite fast food. The roll is not ideal for high-intensity endurance rides.Photo: HandmadePicturesDelicious, isn't it? The cheese roll is probably Germany's favourite fast food. The roll is not ideal for high-intensity endurance rides.

Liquid

Cyclists should top up with around 500 millilitres of fluid in small sips every hour, and significantly more in hot weather. A pinch of table salt can compensate for the loss of minerals when sweating. Other electrolytes for maintaining nerve and muscle function can also be added in the form of coated tablets. The fewer dissolved sugar particles, the less likely digestive problems are. That's why you should opt for hypotonic or isotonic drinks.

No sport without water: a water bottle or hydration bladder is a must on every bike tour.Photo: XenofitNo sport without water: a water bottle or hydration bladder is a must on every bike tour.

Drink additives

No naturally grown food is sufficient to keep the energy metabolism of a professional cyclist going. The easiest way to consume 100 grams of carbohydrates or more per hour is via drink supplements. The ideal ratio of fructose and glucose is two to one. Those who cannot tolerate this combination should use maltodextrin. Also included to replace minerals that have been sweated out: Electrolytes.

Drink supplements have long been the order of the day in professional sport. Ambitious amateur athletes are also increasingly relying on liquid energy from the drinking bottle.Photo: Cadence NutritionDrink supplements have long been the order of the day in professional sport. Ambitious amateur athletes are also increasingly relying on liquid energy from the drinking bottle.

Jan Timmermann is a true mountain biker. His interests cover almost everything from marathon to trail bikes and from street to gravel. True to the motto "life is too short for boring bikes", the technical editor's heart lies above all in bikes with charisma. Jan also runs the fitness centre for our cycling brands.

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