Related Experiment Video
Updated: Jun 16, 2026
08:36
Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
Published on: August 8, 2019
Restorative Sleep Gaps and Occupational Fatigue in the US Navy.
Dale W Russell1, Patrick J Rosopa2
1Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.
Journal of Sleep Research
|June 15, 2026
Summary
Military operations impact sailor well-being. Increased hunger and sleep gaps negatively affect health, job satisfaction, and increase burnout, highlighting the need for better sleep and nutrition support.
Area of Science:
- Operational Medicine
- Human Factors Engineering
- Military Psychology
Background:
- Sustained military operations require peak cognitive function and teamwork.
- Limited sleep and nutritional challenges can impair performance and recovery.
- Understanding these factors is crucial for maintaining operational readiness.
Purpose of the Study:
- To examine the associations between hunger, diet quality, sleep, health, anxiety, burnout, command satisfaction, and mishap risk in US Navy sailors.
- To evaluate the influence of the restorative sleep gap on operational outcomes.
- To determine if occupational roles or departments have a greater impact on fatigue-related outcomes.
Main Methods:
- Structural equation modeling was used to analyze data from 9742 enlisted US Navy sailors across 155 ships.
- The study utilized the Job Demands-Resources and Conservation of Resources frameworks.
- Associations between hunger, sleep gap, and various health/operational outcomes were assessed.
Main Results:
- Increased hunger and larger restorative sleep gaps correlated with poorer sleep quality, heightened anxiety, and increased burnout.
- Reduced command satisfaction and increased mishap risk were also linked to greater hunger and sleep deficits.
- Occupational roles showed stronger differentiation in fatigue and health outcomes compared to departments.
Conclusions:
- Hunger and insufficient sleep significantly impair sailor health and operational effectiveness.
- Targeted fatigue-risk management strategies addressing sleep and nutrition are essential in operational settings.
- Recognizing the impact of specific occupational roles is key to mitigating fatigue vulnerability.
Related Concept Videos
01:13Insufficient Sleep and Sleep Deprivation
Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
Sleep deprivation is a more severe form of sleep loss...
Sleep deprivation is a more severe form of sleep loss...
01:24Sleep-Wake Cycles
Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
01:24Substance Use Disorders Affecting Sleep
Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
Understanding the concepts of physical dependence,...
Understanding the concepts of physical dependence,...
01:11Understanding Sleep
Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
01:07Narcolepsy
Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.
01:19Management of Insomnia
The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...