Stable energy & endurance
Why lasting a long time has never been about sugar
In endurance sports, we often talk about the mental aspect.
Of will.
Of exceeding.
But when you honestly look at what makes the majority of athletes explode, it's not courage that's lacking.
It is the energy that becomes unpredictable.
The slump.
The munchies.
The head gives way when the legs could still move forward.
This is not a coincidence.
It's almost always a matter of fuel.
Endurance is about stability, not excitement.
Sugar has one obvious advantage: it acts quickly.
It's reassuring.
It gives the impression of control.
But this same sugar has a structural defect: it doesn't hold together.
The longer the effort lasts, the more fragile this model becomes.
We go up, we fall, we compensate, then we start again.
Until the point where the system absorbs nothing more.
True endurance does not reward what excites.
It rewards what lasts .
How the body is actually designed to produce energy
The human body is not badly made.
It is simply being misused.
It has two main sources of energy.
Carbohydrates are fast, efficient, but limited.
And lipids, much slower, but virtually inexhaustible.
Even a lean athlete carries tens of thousands of calories in the form of fat.
The problem is therefore never the lack of energy.
The problem is access to this energy.
And this access depends directly on the hormonal environment.
Zone 2: where everything really happens
Zone 2 corresponds to a moderate effort.
The one where breathing remains controlled.
The one that can be maintained for a long time.
It is at this intensity that the body learns to become efficient.
That the mitochondria develop.
That fat oxidation increases.
The work of Jeff Volek and Stephen Phinney , particularly through the FASTER study, has shown something simple but disturbing:
Athletes adapted to low carbohydrate availability are able to oxidize much more fat, at intensities where sugar was previously thought to be essential.
It is not an ideology.
It's a metabolic measure.
Why sugar prevents this adaptation
The problem with sugar is not that it is “bad”.
The problem is what it triggers.
Each sugar intake stimulates insulin.
And insulin always sends the same message to the body: store .
When insulin is high, access to fats is blocked.
Lipolysis slows down.
The body becomes dependent on glucose again.
In other words, the more you feed sugar, the more you prevent the body from learning to do things differently.
That's exactly what Tim Noakes has been saying for years:
A diet too focused on sugar keeps the athlete in a state of metabolic dependence, incompatible with long and repeated efforts.
What is called stable energy
Stable energy is not weak energy.
It's a predictable energy source.
She doesn't try to impress at first.
Above all, it avoids collapsing along the way.
It respects the physiology of prolonged exertion.
It allows the body to use what it was designed to do.
In endurance sports, consistency always beats brutality.
The contexts where this stability changes everything
On a long outing or in Zone 2, the goal is not to “hold on at all costs”.
The goal is to build an adaptation .
Before a session, the goal is not to induce a peak, but to arrive ready, clear, without metabolic debt.
Before a race, anything that disrupts digestion or energy becomes an unnecessary risk.
And on busy days, when the effort is more mental than physical, the same rules apply: peaks tire you out, stability liberates you.
Why an approach like BSE simply makes sense
BSE is not seeking to eliminate sugar.
He is trying to prevent it from becoming the only option.
A moderate intake of lipids, including MCTs, provides readily available energy without causing an insulin spike.
Without blocking access to fats.
Without disrupting metabolic processes.
One BSE product provides approximately 5g of MCT .
That's not much.
But it's sufficient to support an outing in Zone 2, a long effort, or a continuous day, without disrupting the system.
It's not radical.
That makes sense.
What stable energy is not
This is not a miracle promise.
This is not a universal solution.
And it's certainly not the ideal tool for sprinting or exploding over five minutes.
It's one tool among many.
Use at the right time.
Conclusion
Endurance is not a fight against fatigue.
It's a conversation with the metabolism.
The more we respect the body's natural logic,
The less you need to force it.
And in this logic, one thing remains true, regardless of the trends:
What lasts always wins against what excites.
Sources & references (selection)
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Volek JS, Phinney SD et al. – FASTER Study , Metabolism, 2016
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Noakes T. – Lore of Running , Waterlogged , lectures on lipid adaptation
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Brooks GA – work on substrate oxidation and Zone 2 training
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Coyle EF – Energy Metabolism and Endurance
