How To Quickly Improve Your Decision-Making Quality Late in Games - Using Soccer Breathwork Training

Stefan Peter – Mental Performance Coach & Sports Psychology Specialist

Decision-making is the invisible skill in soccer - but it’s often the one that decides games.
Every scan, every pass selection, every defensive adjustment is a choice made in fractions of a second. Across 90 minutes, a player makes hundreds of them. The best players aren’t just faster or stronger - they make better decisions, especially under pressure and late in games.

And that’s where the drop-off between good and great players usually happens.

As coaches, we mostly see it late in the game. A player rushes a clearance instead of executing the composed build-out pattern they’ve trained hundreds of times. Or an unnecessary vertical pass lands straight at the opponent’s feet. We know the player doesn’t usually make these simple mistakes, so we blame fatigue.

And that’s not wrong.

But my job as a mental performance coach is to look deeper and explain what’s happening inside the brain and nervous system - so coaches and players can actually train for it and reduce those mistakes in the future.

What Really Happens Under Fatigue

What Happens in the Muscles — Beyond Lactate?

As match intensity remains high, muscle contractions continuously produce carbon dioxide (CO₂) as a natural byproduct of energy production. The harder the body works, the more CO₂ is generated. Rising CO₂ is one of the primary drivers of breathing and creates the sensation of breathlessness.

This sensation is closely linked to survival mechanisms. “Our biggest fear is suffocation” 
Specialized receptors in the body detect rising CO₂ levels and signal the brain to increase 
ventilation. When CO₂ rises quickly, it can trigger a strong internal alarm response. For some athletes, this respiratory discomfort is simply uncomfortable. For others, the nervous system interprets it as threat, increasing sympathetic activation - the body’s fight-or-flight response.

That process isn’t a flaw. It’s physiology doing its job.

But because breathing and CO₂ tolerance are rarely trained intentionally, this becomes a 
performance issue under stress and some players literally panic and we can see it in their decision making.

When the Nervous System Becomes Reactive

When the body interprets rising internal pressure as threat and sympathetic activation increases, attention narrows. Decisions speed up - but often lose quality. They become reactive instead of controlled.

The real issue here is CO₂ tolerance and missing “Pressure Confidence,” or what is often called stress resilience - but rarely explained in practical training terms.

If players haven’t trained their ability to tolerate elevated CO₂ and respiratory discomfort, the nervous system becomes more reactive under stress and fatigue. And when the system becomes reactive, decision-making quality declines.

Because decision-making is not just about speed. It’s about quality under pressure.
It’s important to train reaction and decision speed - for example, using tools like those from A-Champs and Goal Station in a recovered and fatigued state. But it is just as important to train the body and nervous system to stay in control late in the game, when fatigue affects every player. 

Decision-making speed is only as valuable as decision-making quality under pressure.

That’s where soccer breathwork enters the performance conversation — not as a relaxation tool, but as a way to build CO₂ tolerance and nervous system stability so that when the body feels under pressure, the mind doesn’t rush with it.

When Breathing Muscles Limit Performance

Breathing is muscular work. The diaphragm, intercostals, and accessory muscles consume oxygen and require blood flow — just like quads or hamstrings. When they fatigue, the body diverts blood to support respiration, leaving working limbs with less oxygen. The result: fine motor control drops,  sprinting speed drops, precision fades, and even short, technical passes feel heavier than they should.

That’s why functional breathing training is becoming standard at the elite level. Athletes like Stephen Curry, defenders like Jonathan Tah, and clubs such as Liverpool FC integrate structured respiratory work to stay efficient under load.

Stronger, fatigue-resistant breathing muscles keep limbs stable, maintain technical precision, and support mental clarity - especially late in games.

Stress Tolerance: The Elite Navy Seal Edge 

Pro teams like Bodø/Glimt combine this physical training with mental preparation. They even work with a former fighter pilot to help players manage stress. Fighter pilots operate under extreme heart rate, rapid breathing, and cognitive overload - yet make precise decisions. Soccer players can train the same way.

Performance Soccer Breathwork Training improves CO₂ tolerance, strengthens respiratory muscles, and trains the nervous system to stay calm under pressure. It’s the same approach used by special forces, fighter pilots, and paramedics to maintain focus in chaotic environments.

The outcome is clear: players stay more sharp, focused, composed, and decisive even when fatigue hits.

How Soccer Breathwork Training Supports Decision Making Speed and Quality

A Player Example: Focus Drops Late in the Game

One player I worked with last season illustrates why this kind of training matters. A 17-year-old academy midfielder, physically strong with excellent stamina and leg power, consistently struggled in the final 15–20 minutes. First touches slowed, passes went astray, and scanning the field became inconsistent.

From the first session, it was clear his breathing function was off - a problem shown in Japanese studies to affect 87.5% of athletes. Under high-intensity play, his respiratory muscles were overworked. Rising CO₂ subtly triggered stress responses in his nervous system. Attention narrowed, decisions became reactive, and composure slipped - even though physically he could have continued at a high level.

How We Trained

Over six weeks, we focused on:

• Strengthening his breathing muscles 
• Building CO₂ tolerance
• Introducing simple pre-performance routines to help reset during high-intensity phases
  

The goal wasn’t to change how he breathed during matches, but to give his body and nervous system the tools to stay calm and focused under internal pressure and fatigue.

The Outcome

By the end of the program, late-game passes were cleaner, first touches sharper, and he reported feeling more “in control” when the game felt fast or intense.

This shows that decision-making under fatigue isn’t just about legs or stamina. It’s about how the body and nervous system manage stress and how breathwork can help maintain focus and composure when it matters most.

Final Thoughts

Soccer breathwork isn’t about forcing relaxation or changing breathing during a game. It’s about giving the body and nervous system the tools to handle the natural pressure of high-intensity play. Strengthening breathing muscles, improving CO₂ tolerance, and developing self-awareness helps players stay sharp, focused, and composed when fatigue sets in. Sometimes a small adjustment in how the body and mind handle stress is all it takes to make late-game decisions feel a little clearer.