Personal Light Treatment Devices: A Countermeasure to Improve Sleep, Fatigue, and Circadian Misalignment in an Operational Setting DOI Creative Commons
Sarah Chabal, Emily Moslener, Rachel R. Markwald

et al.

SLEEP Advances, Journal Year: 2024, Volume and Issue: 6(1)

Published: Dec. 19, 2024

Abstract Carefully timed light exposure is a promising countermeasure to overcome the negative sleep and circadian implications of shift work. However, many lighting interventions are static applied at group level (e.g. banks, changes ambient lighting), which not appropriate for all populations or settings. This study investigates whether individualized exposure, via personal treatment devices (PLTDs), can improve sleep, sustain projected performance, entrain rhythms with work schedules US Navy submariners. Submarines unique testbed PLTD intervention because they provide self-contained environment little influence from outside lighting. Forty-two submariners were pseudo-randomly assigned either Control group. participants wore blue-light glasses ~40 minutes upon waking blue-blocking ~2 hours before sleep; did use PLTDs. Both groups completed questionnaires assessing subjective mood after 12-day intervention, wrist actigraphy objectively assess predicted phase outcomes. Compared group, several objective outcomes performance scores improved in The group’s (modeled actigraphy-derived accelerometer data) more rapidly shifted align scheduled periods. Compliance was high, no major disruptions operational duties reported. These data initial support PLTDs as flexible customizable fatigue, loss, misalignment an environment.

Language: Английский

Circadian Rhythmicity and 24/7 Operations DOI
Panagiotis Matsangas, Nita Lewis Shattuck

Current Sleep Medicine Reports, Journal Year: 2025, Volume and Issue: 11(1)

Published: March 20, 2025

Language: Английский

Citations

0
Changes in higher order cognitive function between four watchkeeping schedules DOI Creative Commons

Jacob R Guzzetti,

I Marando, Raymond W. Matthews

et al.

SLEEP Advances, Journal Year: 2024, Volume and Issue: 5(1)

Published: Jan. 1, 2024

Maritime industries utilize many different watch keeping schedules to maintain vigilance and crew safety around the clock. These can be fatiguing, negatively impacting vigilant attention. This has led consideration of that might allow for more sleep time, but how these impact higher order cognitive function remains unclear. require assessment with tasks are relevant real-world operations on maritime vessels. study investigated effect four function.

Language: Английский

Citations

0
Effects of positive psychological control intervention on sleep and psychology of officers and soldiers working at sea DOI Open Access
Yuqing Liu, Jing Sun, Mei Jing

et al.

World Journal of Psychiatry, Journal Year: 2024, Volume and Issue: 14(10), P. 1538 - 1546

Published: Oct. 16, 2024

BACKGROUND The working environment of submarine crews is also very special. They are in a closed, high-temperature, high-noise, high-vibration and narrow living space for long time, they suffer from physical discomfort caused by seasickness, which will affect the mental health officers soldiers. American psychologists have achieved positive results psychological resilience training soldiers perspective psychology. At present, there few reports on correlation between field domestic research crew psychology, it necessary to conduct further research. AIM To explore impact active regulation intervention operating confined spaces at sea. METHODS A total 121 large ship were randomly divided into an experimental group control group. 50 given course intervention, while 71 did not receive any measures. Pittsburgh Sleep Quality Index, Psychological Resilience Scale, military Stress Self-Assessment Questionnaire, General Self-Efficacy Scale scores compared before 6 months after intervention. RESULTS Under except sleep efficiency (P = 0.05), difference remaining dimensions Index with was statistically significant < 0.05); assessment condition showed that, addition Self-assessment Questionnaire Military Personnel Mental Toughness (Dispositional II) group, 0.05) pre-intervention. CONCLUSION Positive can improve state

Language: Английский

Citations

0
The impact of a 20‐h rotating watch schedule on cognitive and mood states in submarine operations DOI Creative Commons
David Erez, Harris R. Lieberman,

Nadav Rafael

et al.

Journal of Sleep Research, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 14, 2024

Summary This is the first study to provide valuable insights into effects of Israeli Navy's 20‐h rotating watch schedule on submariners’ alertness, mood states, risk‐taking behaviours, and sleep. Specifically, we assessed impact non‐circadian‐aligned cognitive performance, mood, behavioural outcomes in a highly controlled submarine environment. A total 20 male submariners participated an at‐sea mission, where their propensity, caffeine consumption were measured. psychomotor vigilance task (PVT) propensity for risky behaviour (Evaluation Risks Scale) measured Profile Mood States evaluated disturbances. Actigraphy was used monitor sleep times. Data analysed according seven segments. Submariners slept mean (standard error [SEM]) 8.3 (0.2) h/24 h, fragmented 3.7 (0.8) h epochs. Caffeine decreased at sea (mean [SEM] 149.3 [6.0] mg) compared land 205.5 [7.2] mg; p = 0.027). In PVT, premature responses significantly increased during Watch VI (5:00–8:00 p.m.) VII (8:00 p.m.–12:00 a.m.; 0.014). subscales, tension higher II (4:00–8:00 0.002), indicating greater stress. Risk‐taking afternoon shifts ( 0.050). The led sleep, reduced alertness evening, worsened states early morning, afternoon. These findings suggest need Navy establish evidence‐based guidelines optimise improve overall well‐being.

Language: Английский

Citations

0
Personal Light Treatment Devices: A Countermeasure to Improve Sleep, Fatigue, and Circadian Misalignment in an Operational Setting DOI Creative Commons
Sarah Chabal, Emily Moslener, Rachel R. Markwald

et al.

SLEEP Advances, Journal Year: 2024, Volume and Issue: 6(1)

Published: Dec. 19, 2024

Abstract Carefully timed light exposure is a promising countermeasure to overcome the negative sleep and circadian implications of shift work. However, many lighting interventions are static applied at group level (e.g. banks, changes ambient lighting), which not appropriate for all populations or settings. This study investigates whether individualized exposure, via personal treatment devices (PLTDs), can improve sleep, sustain projected performance, entrain rhythms with work schedules US Navy submariners. Submarines unique testbed PLTD intervention because they provide self-contained environment little influence from outside lighting. Forty-two submariners were pseudo-randomly assigned either Control group. participants wore blue-light glasses ~40 minutes upon waking blue-blocking ~2 hours before sleep; did use PLTDs. Both groups completed questionnaires assessing subjective mood after 12-day intervention, wrist actigraphy objectively assess predicted phase outcomes. Compared group, several objective outcomes performance scores improved in The group’s (modeled actigraphy-derived accelerometer data) more rapidly shifted align scheduled periods. Compliance was high, no major disruptions operational duties reported. These data initial support PLTDs as flexible customizable fatigue, loss, misalignment an environment.

Language: Английский

Citations

0