Train the Brain Before Pressure Arrives: The Science of Performing Under Stress

Sonny Wilson

Sep 4

13 min read

Updated: 6 days ago

Watch a great athlete compete under pressure and it is tempting to conclude that they possess something the rest of us don't.

They stay composed when the crowd is hostile.

They recover after making a mistake.

They execute a skill when the outcome matters most.

We often describe this as mental toughness.

There is nothing inherently wrong with that phrase. The problem is that it can make performance under pressure sound like a personality trait: some people are mentally tough, while others simply aren't.

Sport psychology and neuroscience give us a much more useful picture.

Many of the abilities we associate with mental toughness — attentional control, mental imagery, emotional regulation, stress appraisal, confidence built through preparation and the ability to refocus after mistakes — can be developed.

In other words, the brain isn't simply along for the ride while the body performs.

The brain is part of the performance system.

And just like strength, mobility, conditioning or boxing technique, parts of that system can be trained.

Mental Toughness Is an Outcome, Not the Whole Explanation

When someone performs well under pressure, we see the outcome.

We don't see the hundreds or thousands of hours that created it.

An experienced boxer doesn't consciously calculate every defensive movement when a punch comes toward them. A skilled tennis player doesn't consciously work through a checklist before returning a 200 km/h serve.

Through repeated practice, perception and movement become increasingly efficient and automatic.

This is one reason purposeful training matters.

Practice isn't simply building stronger muscles or better cardiovascular fitness. It is also teaching the nervous system what to recognize, what to ignore and how to respond.

The same principle can extend to psychological preparation.

Athletes can rehearse situations before encountering them.

They can practise redirecting attention.

They can develop routines for recovering from mistakes.

They can become more familiar with uncomfortable levels of arousal.

They can learn to interpret some of the sensations associated with pressure differently.

That is much more useful than simply telling someone:

"Be confident."

Confidence usually has to be built.

Your Brain Can Rehearse Before Your Body Performs

One of the most interesting areas of performance research involves motor imagery, sometimes called mental rehearsal.

This means deliberately imagining yourself performing a movement or skill without physically performing it.

Mental imagery isn't equivalent to physical practice, and it certainly shouldn't replace it.

But it can complement physical training.

A classic 1995 experiment led by neurologist Alvaro Pascual-Leone examined participants learning a five-finger piano sequence. Researchers used transcranial magnetic stimulation to map areas of the motor cortex involved in the task.

Physical practice produced measurable changes in motor-cortex representation.

Remarkably, participants who mentally rehearsed the sequence also demonstrated changes in the cortical motor areas associated with the task.

That doesn't mean imagining yourself doing something is exactly the same as physically doing it. The physical-practice group ultimately had important performance advantages.

But it provided compelling evidence that mental rehearsal can influence the neural systems involved in movement.

More recent sports research supports the practical value of imagery.

A 2025 systematic review and multilevel meta-analysis involving 86 studies and more than 3,500 athletes found that imagery practice can improve athletic performance across several performance domains.

The effect isn't magic.

Imagery is another form of practice.

What Good Visualization Actually Looks Like

Visualization is sometimes presented as sitting quietly and imagining yourself winning.

That's not particularly useful.

Effective imagery is much more specific.

A boxer might mentally rehearse:

staying relaxed while an opponent applies pressure
seeing an incoming jab
slipping outside it
maintaining balance
returning with a combination
hearing the coach's instructions
feeling fatigue without panicking
recovering immediately after making a mistake

A lifter might rehearse:

approaching the bar
setting their stance
creating appropriate tension
breathing and bracing
executing the lift
maintaining position when the load becomes difficult

Someone preparing for their first group fitness class could even rehearse walking into an unfamiliar gym, meeting the instructor, learning the movements and successfully completing the session.

The objective isn't fantasy.

It's familiarity.

You're giving the brain an opportunity to encounter the situation before the actual situation arrives.

Pressure Isn't Necessarily the Enemy

Another important misconception is that great performers don't experience stress.

Of course they do.

A racing heart, increased breathing rate, heightened alertness and sympathetic nervous-system activation are normal responses when something important is happening.

The important question isn't always:

"How do I eliminate stress?"

Sometimes a better question is:

"How do I perform while experiencing it?"

Acute stress can prepare the body for action.

Problems arise when arousal becomes excessive, attention becomes poorly controlled or the situation is interpreted as something we cannot manage.

This brings us to an important concept in performance psychology: challenge versus threat appraisal.

The Same Pressure Can Produce Different Responses

Imagine two athletes waiting to compete.

Both notice:

increased heart rate
butterflies in the stomach
faster breathing
muscle tension
heightened alertness

Athlete A thinks:

"I'm nervous. Something is wrong. I'm going to screw this up."

Athlete B thinks:

"My body is getting ready. I've prepared for this. Let's go."

The physiological sensations may initially be quite similar.

The interpretation isn't.

Research into challenge and threat states suggests that people tend to perform better when they perceive their available resources as sufficient for the demands they face.

A 2025 systematic review and meta-analysis covering 62 studies and more than 7,400 participants found that challenge states were associated with better performance than threat states across domains including sport, although the average effects were relatively small.

That last point matters.

We shouldn't turn this into another motivational slogan claiming that positive thinking overrides physiology.

It doesn't.

But how we interpret stress can influence attention, behaviour and physiological responses, and those differences can affect performance.

Reframing Is Not Pretending Everything Is Fine

There is an important distinction between useful reappraisal and empty positive thinking.

If you haven't trained for something, telling yourself you're completely prepared doesn't suddenly make you prepared.

Real confidence has evidence behind it.

You practised.

You developed the skill.

You made mistakes.

You corrected them.

You encountered increasingly difficult situations.

You learned that you could handle them.

This is why physical preparation and psychological preparation should work together.

The goal isn't to convince yourself that a challenge is easy.

It is to recognize:

"This is difficult, but I have resources I can use."

That's a very different message.

Why Training Under Appropriate Pressure Matters

This is something coaches have understood long before neuroscience gave us terminology for it.

If an athlete only practises a skill in perfectly comfortable conditions, we shouldn't be surprised when that skill becomes less reliable under pressure.

Eventually, practice needs context.

In boxing, that might progress from:

learning a technique slowly
practising it on pads
using it during controlled partner drills
performing it against unpredictable movement
using it during technical or flow sparring
eventually applying it under greater competitive pressure, where appropriate

Each stage increases uncertainty.

But the athlete isn't thrown directly into chaos.

They are progressively exposed to it.

This is psychological progressive overload.

Stress Inoculation Through Training

We normally think of progressive overload in terms of muscles.

Add resistance.

Add repetitions.

Increase range of motion.

Increase complexity.

But coaching can also progressively increase decision-making demands and psychological pressure.

Consider balance training.

Standing on one leg in an empty room is one challenge.

Maintaining balance while catching something, reacting to a cue or performing another task introduces additional cognitive demands.

Or consider strength training.

Learning a squat with no time pressure is different from performing the same movement while tired during a circuit.

Neither approach is automatically better.

They train different demands.

Good programming gradually exposes people to the situations in which they eventually need their skills to work.

Attention Is a Trainable Performance Skill

Pressure can also change where attention goes.

Instead of concentrating on relevant information, we may become preoccupied with:

the outcome
the audience
previous mistakes
what other people think
physical sensations
consequences of failure

This consumes attentional resources.

A boxer who starts thinking about losing the round may stop seeing punches developing.

A lifter worried about whether they can finish the set may abandon technique.

Someone learning a new movement may become so worried about doing it incorrectly that they become stiff and hesitant.

Good coaching redirects attention toward something useful.

See the target.

Move your feet.

Breathe.

Stay tall.

Drive through the floor.

Hands back to guard.

Simple cues work because the athlete doesn't need a lecture when the nervous system is already processing a demanding situation.

The Reset May Matter More Than the Mistake

Great performers still make mistakes.

The difference is often how long the mistake continues influencing them.

In boxing, getting caught with a clean punch doesn't have to determine what happens next.

But reacting emotionally can.

You get frustrated.

You rush forward.

Your defence disappears.

You get hit again.

One error becomes three.

The same thing happens outside sport.

A missed workout becomes:

"I've fallen off the program."

One difficult training session becomes:

"I'm getting worse."

One poor eating decision becomes:

"I've ruined the week."

A powerful performance skill is learning to shorten that chain.

Recognize it. Reset. Continue.

You don't need to pretend the mistake didn't happen.

You need to stop allowing one moment to control the next ten.

Mental Training Cannot Replace Physical Training

This deserves emphasis because neuroscience can easily be oversold.

You cannot visualize your way to strength.

Mental rehearsal cannot replace cardiovascular conditioning.

Imagining perfect boxing combinations won't develop timing against an opponent if you never practise with one.

Thinking confidently about a heavy deadlift won't prepare your tissues to tolerate the load.

The brain and body aren't competing systems.

They are one integrated system.

Physical practice provides sensory information, strength, coordination, conditioning, technical feedback and actual experience that imagery alone cannot reproduce.

The strongest approach combines them.

Train the body. Train the skill. Train the response.

Practical Application: How to Train the Mental Side of Performance

You don't have to be an Olympic athlete to use these ideas.

1. Rehearse Specific Situations

Spend a few minutes imagining an actual task you will perform.

Don't simply imagine success.

Imagine the process.

What do you see?

What do you feel?

What cues matter?

What might go wrong?

How will you respond?

The more specific the rehearsal, the more useful it becomes.

2. Practise Your Reset

Choose a simple routine for mistakes.

For example:

Exhale → posture → refocus → next task.

Use it during training until it becomes familiar.

3. Change the Question Around Stress

Instead of asking:

"Why am I so nervous?"

try:

"What is my body preparing me to do?"

You don't need to eliminate arousal. You need enough control to use it.

4. Direct Attention Toward Controllables

You cannot control:

your opponent
the crowd
the scoreboard
other people's opinions
every outcome

You can usually control:

breathing
positioning
effort
technique
preparation
decision-making
your next action

Bring attention back there.

5. Progressively Add Pressure

Don't wait until the biggest moment to discover how you respond to stress.

Introduce manageable challenges during training.

Time constraints.

Reaction drills.

Unpredictable cues.

Partner work.

Controlled competition.

Fatigue.

The exact method depends on the person and the activity.

Pressure should be progressive rather than reckless.

Common Mistakes in Mental Performance Training

Trying to Eliminate Nervousness

Some arousal is normal and potentially useful.

The goal isn't necessarily complete calm. The goal is functional control.

Using Visualization Without Physical Practice

Mental rehearsal supplements training. It doesn't replace training.

Visualizing Only Perfect Outcomes

Real performance includes mistakes.

Rehearse recovering from them.

Using Generic Positive Affirmations

"I am unstoppable" isn't much help if your brain has no evidence supporting it.

Specific, credible cues tend to be more useful.

Adding Too Much Pressure Too Soon

Throwing beginners into stressful situations doesn't automatically make them mentally tougher.

Just as with physical training, challenge needs appropriate progression.

Who Benefits From This Approach?

Almost everyone.

These principles can help:

competitive athletes
recreational athletes
boxers and kickboxers
people learning new movements
adults returning to exercise
people nervous about joining a gym
clients rebuilding confidence after injury
coaches and instructors
professionals preparing for stressful situations

The intensity of the situation changes.

The fundamental principle doesn't.

We tend to perform better when we have prepared for the demands we are about to face.

The PuncHIIT Perspective

At PuncHIIT, STOP EXERCISING. START TRAINING. has never meant simply lifting heavier weights or following a more structured workout.

Training means having a purpose.

If we want someone to become stronger, we progressively develop strength.

If we want someone to move better, we practice movement.

If we want a boxer to remain composed when punches start coming back, eventually they need carefully controlled exposure to that environment.

And if we want someone to become more confident, simply telling them to "be confident" isn't enough.

We create experiences that give them reasons to become confident.

That means teaching first.

Practicing second.

Progressing appropriately.

Adding complexity when the person is ready.

Allowing mistakes.

Providing feedback.

Then repeating the process.

Over time, the unfamiliar becomes familiar.

The difficult becomes manageable.

And the person who once thought, "I can't do this," begins accumulating evidence that perhaps they can.

That is purposeful training.

And some of the most important adaptations aren't visible in the mirror.

Key Takeaways

Mental toughness isn't simply an inborn personality trait; many skills associated with performing under pressure can be trained.
Mental imagery activates parts of the neural system involved in physical performance and can complement physical practice.
Current research supports imagery as a potentially useful performance-enhancement tool when applied deliberately.
Pressure itself isn't automatically harmful. How we appraise our resources relative to the demands of a situation can influence performance.
Reframing stress is not the same as pretending a difficult situation is easy.
Confidence is strongest when it is supported by genuine preparation and experience.
Attention should be directed toward useful, controllable information.
Learning to reset quickly after mistakes is an important performance skill.
Training should progressively expose people to appropriate levels of complexity and pressure.
Mental preparation supplements physical training; it does not replace it.

Frequently Asked Questions

Is visualization scientifically proven to improve athletic performance?

There is meaningful evidence supporting mental imagery as a performance tool. A 2025 meta-analysis involving 86 studies and 3,593 athletes found overall improvements in athletic performance associated with imagery practice.

Results vary depending on the athlete, task and imagery protocol, so visualization shouldn't be treated as a guaranteed performance enhancer.

It is best viewed as another training tool.

Can imagining an exercise actually make you stronger?

Mental imagery can influence neural processes associated with movement and may contribute to some performance adaptations, but it cannot provide the full muscular, skeletal, connective-tissue and metabolic stimulus produced by physical training.

If your goal is strength, you still need to train physically.

Should I try to calm myself completely before competing?

Not necessarily.

Elevated heart rate, faster breathing and heightened alertness are normal parts of preparing for demanding activity. For many people, trying desperately to eliminate those sensations can actually make them more distracting.

Instead, learn to recognize them and direct your attention toward the task.

Can you actually train yourself to handle pressure?

To an extent, yes.

Repeated exposure to appropriately challenging situations, mental rehearsal, attentional strategies, breathing, preparation and experience can all improve your ability to function under pressure.

That doesn't mean pressure eventually disappears.

It means you develop better tools for responding to it.

Is this useful if I'm not an athlete?

Absolutely.

The same broad principles apply whenever performance matters: giving a presentation, starting an unfamiliar exercise program, returning after injury, learning a difficult movement or simply entering an environment that initially feels intimidating.

Preparation reduces uncertainty.

What's the difference between mental toughness and ignoring discomfort?

They are not the same thing.

Mental toughness shouldn't mean ignoring pain, injury, exhaustion or legitimate warning signs.

Good performers know when to push and when to adjust.

Sometimes the mentally disciplined decision is to stop.

Coach's Corner

I've spent enough years coaching boxing and fitness to know that telling somebody to "relax" usually doesn't make them relax.

And telling someone to "be confident" doesn't magically make them confident either.

You build those things through training.

I've watched people look completely uncomfortable the first time punches start coming back at them. Their shoulders tighten. They hold their breath. Their eyes get big. Everything they've practised suddenly seems to disappear.

So you slow things down.

Give them something manageable.

Let them experience it.

Do it again.

Then add a little more.

Eventually something changes. They're still seeing the punches. They're still under pressure. But now their brain recognizes the situation.

They've been here before.

That's when you start seeing confidence that is actually earned rather than manufactured.

The same thing happens with lifting weights, learning kettlebells, joining a group class or returning after an injury.

You don't become capable by repeatedly telling yourself you're capable.

You train until you've given yourself evidence.

That's the difference between hoping you'll perform when it matters and preparing yourself to do it.

— Sonny Wilson

References

Pascual-Leone, A., Nguyet, D., Cohen, L.G., Brasil-Neto, J.P., Cammarota, A. & Hallett, M. (1995). Modulation of muscle responses evoked by transcranial magnetic stimulation during the acquisition of new fine motor skills. Journal of Neurophysiology, 74(3), 1037–1045. doi:10.1152/jn.1995.74.3.1037. The experiment compared physical and mental practice of a five-finger piano exercise and documented plastic changes in cortical motor representations.

Liu, Y., Zhao, S., Zhang, X., Zhang, X., Liang, T. & Ning, Z. (2025). The Effects of Imagery Practice on Athletes' Performance: A Multilevel Meta-Analysis with Systematic Review. Behavioral Sciences, 15(5), 685. The analysis included 86 studies involving 3,593 athletes and found that imagery practice improved several measures of athletic performance.

Yazgan, E.A. et al. (2026). Effectiveness of Motor Imagery and Action Observation in Parameters of Sport Performance: A Systematic Review. Perceptual and Motor Skills, 133(1), 224–249. The review found promising evidence for motor imagery and action observation across outcomes including reaction time, speed, strength and sport-specific performance while noting that an optimal protocol remains uncertain.

Hase, A., Nietschke, M., Kloskowski, M., Szymanski, K., Moore, L., Jamieson, J.P. & Behnke, M. (2025). The effects of challenge and threat states on performance outcomes: An updated review and meta-analysis of recent findings. EXCLI Journal, 24, 151–176. Across 62 studies involving 7,418 participants, challenge states were associated with better performance than threat states, although average effects were small.

Meijen, C., Turner, M., Jones, M.V., Sheffield, D. & McCarthy, P. (2020). A Theory of Challenge and Threat States in Athletes: A Revised Conceptualization. Frontiers in Psychology, 11, 126. This paper reviews and updates the psychophysiological framework explaining how athletes' cognitive appraisal of demanding situations may influence challenge and threat responses.

Moore, L.J., Vine, S.J., Wilson, M.R. & Freeman, P. (2018). Successful performance and cardiovascular markers of challenge and threat: A meta-analysis. International Journal of Psychophysiology, 130, 73–79. The authors found relatively small but reasonably stable relationships between challenge/threat cardiovascular responses and performance while also identifying limitations and possible publication bias in the literature.

Ready to Start Training?

Performing well under pressure isn’t something you simply have—or don’t have. Confidence, composure and skill are developed through preparation, practice and progressively challenging yourself in the right environment.

That’s what purposeful training is about.

At PuncHIIT Fitness, we help people build strength, conditioning, movement skills and confidence through training that is coached, progressive and appropriate for the individual.

Whether your challenge is learning boxing or kickboxing, becoming stronger and fitter, or working toward a specific goal with a personal trainer, the process is the same: start where you are, train with purpose, and build from there.

Ready to Get Started?

https://www.punchiit.ca/get-started

STOP EXERCISING. START TRAINING.