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How Nutrition Affects Mental Focus and Game-Day Nerves

  • Writer: Jenaed  Brodell
    Jenaed Brodell
  • Aug 8
  • 3 min read

Food Fuels More Than Muscles


We often think about food as fuel for our bodies. But here’s the truth: your brain needs fuel too. What you eat can help you focus better, stay calm under pressure, and even reduce pre-game anxiety.


That’s why athletes need more than just training. To truly perform at your best, you need a game-day nutrition plan that supports both your body and mind.

Let’s break it down in simple terms.


The link between Nutrition and Mental Focus


Carbs = Brain Energy


Your brain runs mostly on glucose, which comes from carbohydrates. But not all carbs are created equal.


Choose complex carbs such as:

  • Oatmeal

  • Whole grain bread

  • Brown rice

  • Quinoa

  • Sweet potatoes

These release energy slowly, helping you stay sharp without crashing.


Avoid simple carbs such as:

  • Sugary cereals

  • Candy

  • Soda

  • White bread

They spike your blood sugar, then cause a crash, making you tired and unfocused.


Protein Keeps You Alert

Protein gives your brain the building blocks to make chemicals like dopamine (helps with motivation) and serotonin (boosts mood).


Good protein choices:

  • Eggs

  • Chicken

  • Greek yogurt

  • Tofu

  • Protein smoothies


Eating protein with meals helps you stay focused and avoid energy dips.


Healthy Fats Help You Think


Your brain is made up mostly of fat. That’s why healthy fats are important for clear thinking and memory.


Best sources:

  • Avocados

  • Salmon or tuna

  • Walnuts and chia seeds

  • Olive oil


These fats also reduce inflammation, which helps with stress and recovery.


How Food Helps Manage Game-Day Nerves

Everyone gets nervous before a big game or performance. But nutrition can actually help calm your nerves and improve mental focus.


Magnesium = Natural Relaxation

,Magnesium helps your body handle stress; however many people don’t get enough.

Eat more:

  • Spinach

  • Almonds

  • Pumpkin seeds

  • Dark chocolate


Don’t Forget to Hydrate


Even small amounts of dehydration can mess with your focus and mood.


Hydration tips:

  • Drink water throughout the day, not just right before the game.

  • Add electrolytes if you sweat a lot.

  • Skip sugary or overly caffeinated drinks.


Be Careful With Caffeine


Caffeine can help with alertness, but too much can cause jitters and anxiety, especially if you’re already nervous.


Smart caffeine use:

  • 1 cup of coffee or tea is enough.

  • Don’t drink it on an empty stomach.

  • Avoid caffeine late in the day as it can affect sleep.


What About Athletes With IBS?

If you have Irritable Bowel Syndrome (IBS), you already know nutrition and mental focus, such as stress, can trigger symptoms. That’s tough when you’re trying to focus and compete.

Here’s how to stay in control:


IBS Nutrition Tips:


  • Try a low-FODMAP diet (low in fermentable carbs).

  • Avoid triggers like garlic, onions, beans, and dairy.

  • Eat smaller meals more often.

  • Don’t try new foods on game day.

  • Work with a sports dietitian to build a personalised plan.


Athlete in black sports gear crouches in a starting position, focused, against a brown background. Determination is evident in his expression.

What to Eat on Game Day?


2-3 Hours Before:

  • Grilled chicken with brown rice

  • Quinoa bowl with avocado and eggs

  • Peanut butter on whole grain toast and a banana


30-60 Minutes Before:

  • Protein smoothie with berries and spinach

  • Rice cake with nut butter

  • Small banana or applesauce pouch


Avoid These:

  • Fried or greasy foods

  • Large meals

  • High-fibre or gassy foods (especially if you have IBS)

  • Too much sugar or caffeine


FAQ: Nutrition, Focus & Game-Day Nerves


1. What should I eat to stay focused before a game?

A mix of complex carbs, protein, and healthy fats works best. Try something like oatmeal with nut butter and banana or grilled chicken with quinoa and veggies.


2. Does dehydration affect my mental performance?

Yes! Even mild dehydration can make you tired, unfocused, or moody. Drink water throughout the day, especially if you’re sweating during training or competing in hot weather.


3. What can I eat to calm my nerves?

Foods high in magnesium (like spinach and almonds) and omega-3s (like salmon and walnuts) can help calm the nervous system. Avoid too much sugar or caffeine before a game.


Optimise your nutrition by working with our team of sports nutrition experts at Nutrition and Co. Book an initial appointment on WhatsApp through +447888465215.



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Nutrition and Co strives to be a leading force in personalized nutrition, offering a comprehensive range of services through a team of dedicated registered dietitians. Our commitment is to guide individuals and organizations towards sustained health and well-being.

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