Why Don’t Athletes Carb Load the Way They Used To?

If you’ve been around endurance sport for a while, you might remember the older carbohydrate-loading protocols that were once commonly used before competition.

They often involved several days of very low carbohydrate intake, glycogen depletion through training, followed by a much higher carbohydrate intake before race day.

These methods could increase muscle glycogen stores, but they weren’t always pleasant for the athlete.

Fatigue, irritability, poor training quality and digestive discomfort were all fairly common during the depletion phase.

Thankfully, sports nutrition has evolved.

Why Carb Loading Has Changed

We now have a much better understanding of glycogen storage, recovery nutrition and race fuelling.

Modern carbohydrate loading is generally far less extreme.

Rather than deliberately depleting glycogen stores first, athletes will usually increase carbohydrate intake in the days leading into an event while reducing their training volume.

The aim is still to maximise glycogen availability, but without putting the athlete through an unnecessary depletion phase first.

Why the Depletion Phase Is Often Unnecessary

A few things have changed in the way athletes fuel and recover.

We now know that:

recovery nutrition helps restore glycogen throughout training
athletes are generally fuelling better during longer training sessions and races
extreme glycogen depletion is often unnecessary
similar or better outcomes can be achieved with less physiological stress

That means carbohydrate loading can be easier to tolerate, more practical and less disruptive to the athlete’s final days of preparation.

And really, that’s the point.

We want the athlete arriving at the start line well fuelled, energised and ready to perform, not feeling exhausted because of what they did to themselves three days earlier.

What Modern Carb Loading Is Really Trying to Achieve

Modern carb loading is less about doing something extreme and more about making sure carbohydrate availability is high when it matters.

Training volume comes down, carbohydrate intake goes up, recovery is supported and the athlete gets to race day with their glycogen stores well stocked.

It reflects a broader shift we see in sports nutrition.

As our understanding improves, we often move away from extreme protocols and towards strategies that are more practical, sustainable and physiologically appropriate for the athlete.