Stress Rehearsal During Exercise: Useful Training or Just a Hypothesis?

Before an interview, exam or public performance, I sometimes rehearse the stressful situation while exercising. The idea is simple: practice thinking while the body is already aroused. I used to explain this by saying that exercise “burns off” adrenaline and cortisol. That mechanism was too simplistic.

The useful idea hidden inside the old explanation

There is good evidence for stress inoculation and other forms of structured exposure: repeated practice under manageable stress can reduce anxiety and improve performance in later stressful situations. Exercise itself can also reduce anxiety over time.

Those findings make the basic idea plausible: rehearsing a presentation, calculation or decision while mildly physiologically aroused may be useful practice for some people. But that is different from proving that intense exercise plus visualization is a special treatment.

What exercise does to adrenaline and cortisol

Exercise does not simply “use up” stress hormones. Physical activity itself activates the sympathetic nervous system, and sufficiently intense exercise can increase catecholamines and cortisol. After exercise, these responses change during recovery.

So the more defensible model is not “remove adrenaline in advance.” It is practice functioning while aroused.

A safer way to experiment with the idea

1. Choose a moderate activity you already tolerate, such as brisk walking, cycling or easy jogging.
2. During part of the session, mentally rehearse one specific upcoming situation.
3. Practice the actual task when possible: say the opening of the presentation aloud, answer likely questions, or recall key facts.
4. Keep the arousal manageable. The target is practice, not exhaustion.
5. Repeat on several days and compare how you perform and feel.

If exercise makes the rehearsal harder to the point that you cannot think clearly, reduce intensity. There is no evidence-based reason to target a particular heart-rate range such as 100–140 bpm for this purpose.

What we know and what remains a hypothesis

Supported: structured stress-inoculation training can reduce anxiety and improve performance under stress; regular exercise can reduce anxiety in many people.

Plausible but not established: combining a specific mental rehearsal with concurrent exercise is better than rehearsing at rest or exercising separately.

Not supported: the claim that adrenaline and cortisol are “burned off” by accelerated heartbeats and therefore cannot interfere with a later stressful event.

Bottom line

I still think this is an interesting personal training method, but the rationale should be stated correctly. Treat it as a form of rehearsal under physiological arousal, not as a way to purge stress hormones. If the goal is treatment of significant anxiety, panic or trauma-related symptoms, evidence-based psychotherapy should not be replaced by this experiment.

References

• Saunders T, et al. The effect of stress inoculation training on anxiety and performance: meta-analysis.
• Calvo MG, et al. Anxiety and heart rate under psychological stress: effects of exercise training.
• Acute emotional and cardiovascular effects of stressful mental work during aerobic exercise.