# Brain Food for Athletes: Cognition and Performance

> Physical performance starts in the head. Which nutrients are being studied in connection with cognitive function under load and what that means for sports nutrition.

Peak physical performance requires not only a trained body but also a sharp mind. Reaction time, tactical decisions and the ability to stay focused under fatigue are crucial cognitive skills that can make the difference in sport. But how can athletes optimize their mental performance and what role does nutrition play?

## Fueling the Brain

The brain, although it accounts for only about 2% of body weight, consumes around 20% of the body's total energy at rest. Under combined physical and cognitive load, as occurs in competition, this share can rise even further. **Glucose** is the preferred energy substrate, but **ketone bodies** and, to a lesser extent, lactate can also be used. An optimal energy supply is therefore essential for maintaining cognitive function.

## Micronutrients for Mental Sharpness

Certain micronutrients play a key role in brain function. **DHA (docosahexaenoic acid)**, an omega-3 fatty acid, is a major component of neuronal membranes and contributes to normal brain function. An insufficient supply can slow neuronal processing. **Creatine** serves as an energy buffer in the brain and can improve memory, processing speed and resistance to mental fatigue, particularly in people with lower baseline levels. **B vitamins** such as B1, B6 and B12 are cofactors in cerebral energy metabolism and support psychological function.

## Hydration and Amino Acids

Even mild **dehydration** of 1-2% of body weight can impair cognitive functions such as attention, working memory and reaction time, often before any feeling of thirst appears. In sport, where fluid is lost rapidly through sweating, this is especially relevant. **Amino acids** such as tyrosine are precursors of neurotransmitters like dopamine and noradrenaline, which are important for attention and motivation. Tryptophan is the precursor of serotonin, which can play a role in exhaustion.

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## Frequently Asked Questions

**Why is hydration important for cognitive performance?**
Even a small fluid loss of 1-2% of body weight can negatively affect attention, working memory and reaction time. Adequate fluid intake is therefore crucial for mental performance.

**What role does creatine play for the brain?**
In the brain, creatine serves as an important energy buffer for high intensity neuronal processes. Supplementation can improve short term memory, processing speed and resistance to mental fatigue.

**How do B vitamins influence brain function?**
B vitamins such as B1, B6 and B12 are essential cofactors in the brain's energy metabolism. They contribute to normal psychological function and a healthy energy metabolism, which is indispensable for optimal cognitive performance.

## Sources

Rawson ES & Venezia AC (2011), Curr Neuropharmacol - Use of creatine in the elderly and evidence for effects on cognitive function.
Jäger R et al. (2007), J Int Soc Sports Nutr - Analysis of the efficacy, safety, and regulatory status of novel forms of creatine.
Lieberman HR (2003), Nutr Rev - Nutrition, brain function and cognitive performance.

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