The optimal level of stress is the peak of the stress and performance curve. At this level, an individual's performance has reached its maximum.

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As stress levels increase from low to moderate, performance also increases. However, if stress exceeds an optimal level, it becomes excessive and debilitating, leading to a decline in performance.

Stress and Performance

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

OpenStax Psychology (2nd ed.) Textbook

Eustress is the positive stress experienced when the stress level increases from low to moderate, resulting in an increase in performance.

Eustress (Performance)

Optimal Level of Stress

Distress occurs when stress exceeds the optimal level. In this region, stress becomes excessive and debilitating, and performance declines.

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