The Science of Stress and Performance

A little stress makes you sharper. Too much makes you freeze. Here is where the line is.

What the Science Says

Not all stress is created equal. Psychologists draw a clear distinction between eustress (the kind of stress that sharpens focus, boosts motivation, and improves performance) and distress (the kind that overwhelms your system and gets in the way of thinking clearly).

Eustress is what you feel before a presentation when your heart beats a little faster and your attention narrows. That's cortisol and adrenaline doing their job. Your brain enters a state of heightened alertness, which research links to better memory consolidation, faster processing, and stronger motivation. In short, moderate stress is not your enemy during exam season. It's a performance signal.

The problem starts when that activation doesn't switch off. Chronic or excessive stress floods the prefrontal cortex, the part of your brain responsible for planning, reasoning, and decision-making. At that point, stress stops being a tool and starts being noise.

And here's where the data gets interesting: IE students score 4.13 out of 5 on academic self-efficacy (IE University, 2025).  Self-efficacy is your belief in your own ability to succeed in specific situations; not general confidence, but the concrete sense that you can handle what's in front of you. It turns out to be one of the strongest predictors of GPA. Believing you can perform is part of what makes you perform. Stress that erases that belief would be distress.

Signs You've Crossed the Line

Eustress feels like energy. Distress feels like dread. A few signals that you've moved from one to the other:

• You're studying more hours but retaining less
• Small setbacks feel disproportionately catastrophic
• You're sleeping poorly even when you're exhausted
• You've stopped doing things that normally help you reset
• Your inner voice has shifted from "I can do this" to "What's the point"
  
  

One pattern worth naming: IE student data shows a self-kindness score of 3.41/5 (IE University, 2025), the lowest well-being sub-score across all dimensions. Most students are good at noticing when they're struggling, but only some are good at responding to that with any compassion. That gap isn't a personality flaw. It's a skill that can be built.

3 Things That Actually Help

1. Reframe the stress, don't suppress it. 

Research by Alison Wood Brooks at Harvard shows that reappraising anxiety as excitement, literally telling yourself "I'm excited", improves performance under pressure. The physiological state is almost identical. The story you tell about it changes what it does to you. (Brooks, 2014)

2. Use the 4-7-8 breathing technique. Inhale for 4 seconds, hold for 7, exhale for 8. This activates the parasympathetic nervous system and reduces cortisol within minutes. It may sound like a wellness trend, but it's basic nervous system regulation with solid physiological backing.

3. Break the isolation loop. Stress compounds in silence. Talking to someone, a friend, a coach, or a counselor, isn't a sign of not coping. It's one of the most evidence-based stress interventions available. You don't need to be in crisis to use support. If you want to find more about how to find your community at IE read this article: Built on Connection: How Belonging Truly Begins at IE

One last thing: be as rigorous about self-compassion as you are about studying.

Research by Kristin Neff shows that self-compassion during high-stress periods doesn't lower your standards. It protects performance by reducing the anxiety that gets in the way of clear thinking. Treating yourself with patience isn't a soft skill. It's a cognitive strategy.

The IE Well-being Center has a guided practice designed for exactly this moment in the semester. Try it here 

References:

Brooks, A. W. (2014). Get excited: reappraising pre-performance anxiety as excitement. Journal of Experimental Psychology: General, 143(3), 1144.

IE Center for Health & Well-being. (2025). 2024–2025 IE University Student Well-Being Report. https://ieconnects.ie.edu/get_file?pid=ab7cf0629a6883064fa208ce8fec58a62246bafdc2b1c71cdb8fc45bece15

Neff, K. D. (2009). The role of self-compassion in development: A healthier way to relate to oneself. Human development, 52(4), 211.