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Updated: Jun 11, 2025

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
Published on: August 8, 2019
Are Fatigue and Sleepiness the Same? A Brief Introduction to the Differences and Similarities and Their Implications
Max Barham1, Tim Bauerle1, Brianna Eiter2
1CDC NIOSH, 315 E Montgomery Ave, Spokane, WA, 99207.
Abstract:
Fatigue-related risk is a persistent safety concern for the mining industry. However, fatigue and sleepiness are often treated interchangeably, which can lead to confusion and potentially less effective reduction of safety risk. To provide clarity, we present an overview of similarities and differences between work-related fatigue risk and sleepiness including definitions, theories, measurements, and mitigation strategies. As a supplement, a summative visual model which highlights these similarities and differences is presented. Expanding industry knowledge in this area will assist safety professionals in crafting more targeted risk management practices appropriate for work-related fatigue risk, sleepiness, or both.
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