Just a few years ago, choosing an energy gel was relatively straightforward. Most products provided a similar amount of carbohydrates, with the main differences being flavour or consistency.
Today, the situation is completely different.
Modern endurance sports nutrition is developing rapidly, and manufacturers are increasingly using advanced energy-delivery strategies based on different carbohydrate sources, glucose-to-fructose ratios and varying amounts of energy per serving.
As a result, two energy gels may look similar but perform very differently during training or competition.
An energy gel is more than just a source of calories
Many athletes still choose gels based solely on calorie content or flavour.
But the most important questions are:
-
how many grams of carbohydrates does one serving provide?
-
which carbohydrate sources are used?
-
does the product contain caffeine?
-
what is its consistency?
-
will it be easy to consume at high exercise intensity?
These are the factors that influence the effectiveness of a fueling strategy during exercise.
Why does carbohydrate content matter?
One of the biggest changes in recent years has been the gradual increase in the amount of carbohydrates consumed during exercise.
Not long ago, 30–60 g of carbohydrates per hour was the standard.
Today, many athletes consume 90 g or more during marathons, cycling races and triathlons.
That is why we are increasingly seeing gels providing:
-
around 30 g of carbohydrates,
-
around 45 g of carbohydrates,
-
around 60 g of carbohydrates,
-
or even more.
More energy per serving can reduce the number of products needed during competition and make it easier to follow a fueling strategy.
That does not mean, however, that a larger amount will always be the best choice.
Glucose and fructose – why do the ratios matter?
One of the most important elements of modern fueling is the use of different intestinal transporters.
Glucose and fructose use different absorption mechanisms, which allows them to be transported simultaneously.
That is why many modern products use blends of different carbohydrate sources instead of relying on a single ingredient.
This approach can support the delivery of more energy during exercise, particularly during prolonged endurance events.
More does not always mean better
In sport, it is easy to assume that if elite athletes consume 90–120 g of carbohydrates per hour, everyone should do the same.
In practice, however, the effectiveness of a fueling strategy depends primarily on individual gastrointestinal tolerance.
Increasing energy intake too quickly can lead to:
That is why just as important as training your muscles is training your gut.
What is the difference between caffeinated and caffeine-free gels?
Another factor that differentiates energy gels is the presence of caffeine.
Caffeinated gels are often used:
-
before key moments in a competition,
-
during the final stages of a marathon,
-
during long cycling races,
-
when fatigue begins to build.
Meanwhile, caffeine-free gels form the basis of everyday training and most fueling strategies.
In practice, many athletes use both types of products depending on the stage of the effort.
Consistency matters too
During an easy training session, almost any product seems easy to consume.
The situation changes during intense exercise.
A fast running pace, fatigue, high temperatures or limited access to water mean that ease of consumption becomes one of the key elements of an effective fueling strategy.
That is why many athletes test different ways of delivering energy:
The longer the effort, the more important it becomes to combine different energy sources flexibly.
How do you choose the right energy gel?
There is no single best energy gel for everyone.
A good choice should take into account:
-
exercise duration,
-
the planned amount of carbohydrates per hour,
-
gastrointestinal tolerance,
-
weather conditions,
-
whether or not it contains caffeine,
-
individual flavour preferences.
The most effective strategy is one you can follow consistently during training and competition.
Summary
Modern fueling is about much more than choosing the flavour of an energy gel.
Carbohydrate content, glucose-to-fructose ratios, caffeine content, product consistency and the level of gut training can all have a real impact on the comfort and effectiveness of fueling during exercise.
Instead of looking for the “best energy gel”, focus on building your own fueling strategy, tailored to the type of effort, your level of experience and your individual needs.
Why doesn’t every energy gel work the same way? A guide to modern fueling for runners and cyclists
Just a few years ago, choosing an energy gel was relatively straightforward. Most products provided a similar amount of carbohydrates, with the main differences being flavour or consistency.
Today, the situation is completely different.
Modern endurance sports nutrition is developing rapidly, and manufacturers are increasingly using advanced energy-delivery strategies based on different carbohydrate sources, glucose-to-fructose ratios and varying amounts of energy per serving.
As a result, two energy gels may look similar but perform very differently during training or competition.
An energy gel is more than just a source of calories
Many athletes still choose gels based solely on calorie content or flavour.
But the most important questions are:
how many grams of carbohydrates does one serving provide?
which carbohydrate sources are used?
does the product contain caffeine?
what is its consistency?
will it be easy to consume at high exercise intensity?
These are the factors that influence the effectiveness of a fueling strategy during exercise.
Why does carbohydrate content matter?
One of the biggest changes in recent years has been the gradual increase in the amount of carbohydrates consumed during exercise.
Not long ago, 30–60 g of carbohydrates per hour was the standard.
Today, many athletes consume 90 g or more during marathons, cycling races and triathlons.
That is why we are increasingly seeing gels providing:
around 30 g of carbohydrates,
around 45 g of carbohydrates,
around 60 g of carbohydrates,
or even more.
More energy per serving can reduce the number of products needed during competition and make it easier to follow a fueling strategy.
That does not mean, however, that a larger amount will always be the best choice.
Glucose and fructose – why do the ratios matter?
One of the most important elements of modern fueling is the use of different intestinal transporters.
Glucose and fructose use different absorption mechanisms, which allows them to be transported simultaneously.
That is why many modern products use blends of different carbohydrate sources instead of relying on a single ingredient.
This approach can support the delivery of more energy during exercise, particularly during prolonged endurance events.
More does not always mean better
In sport, it is easy to assume that if elite athletes consume 90–120 g of carbohydrates per hour, everyone should do the same.
In practice, however, the effectiveness of a fueling strategy depends primarily on individual gastrointestinal tolerance.
Increasing energy intake too quickly can lead to:
a feeling of fullness,
nausea,
stomach pain,
gastrointestinal issues,
reduced exercise comfort.
That is why just as important as training your muscles is training your gut.
What is the difference between caffeinated and caffeine-free gels?
Another factor that differentiates energy gels is the presence of caffeine.
Caffeinated gels are often used:
before key moments in a competition,
during the final stages of a marathon,
during long cycling races,
when fatigue begins to build.
Meanwhile, caffeine-free gels form the basis of everyday training and most fueling strategies.
In practice, many athletes use both types of products depending on the stage of the effort.
Consistency matters too
During an easy training session, almost any product seems easy to consume.
The situation changes during intense exercise.
A fast running pace, fatigue, high temperatures or limited access to water mean that ease of consumption becomes one of the key elements of an effective fueling strategy.
That is why many athletes test different ways of delivering energy:
energy gels,
energy chews,
carbohydrate drinks.
The longer the effort, the more important it becomes to combine different energy sources flexibly.
How do you choose the right energy gel?
There is no single best energy gel for everyone.
A good choice should take into account:
exercise duration,
the planned amount of carbohydrates per hour,
gastrointestinal tolerance,
weather conditions,
whether or not it contains caffeine,
individual flavour preferences.
The most effective strategy is one you can follow consistently during training and competition.
Summary
Modern fueling is about much more than choosing the flavour of an energy gel.
Carbohydrate content, glucose-to-fructose ratios, caffeine content, product consistency and the level of gut training can all have a real impact on the comfort and effectiveness of fueling during exercise.
Instead of looking for the “best energy gel”, focus on building your own fueling strategy, tailored to the type of effort, your level of experience and your individual needs.