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Clocks & Sleep, Volume 7, Issue 2

2025 June - 12 articles

Cover Story: Monitoring respiratory patterns during sleep is vital for evaluating sleep quality and diagnosing disorders like sleep apnea, which can lead to serious health issues. Traditional methods, such as polysomnography, are costly and limited to clinical use. To address this, we developed a portable, battery-powered sleep sensor using an electret condenser microphone (ECM) to measure nasal airflow. The ECM, biased with constant current circuits, detects subtle breathing changes. Data is wirelessly transmitted via the XBee module using the ZigBee protocol, enabling non-invasive, real-time monitoring at 20 Hz for up to 50 hours. This compact device offers a low-cost, accessible alternative for out-of-clinic respiratory assessment. View this paper
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Articles (12)

  • Article
  • Open Access
1,423 Views
22 Pages

A Sleep Sensor Made with Electret Condenser Microphones

  • Teru Kamogashira,
  • Tatsuya Yamasoba,
  • Shu Kikuta and
  • Kenji Kondo

Measurement of respiratory patterns during sleep plays a critical role in assessing sleep quality and diagnosing sleep disorders such as sleep apnea syndrome, which is associated with many adverse health outcomes, including cardiovascular disease, di...

  • Article
  • Open Access
1 Citations
4,235 Views
18 Pages

Associations Between Sleep Patterns, Circadian Preference, and Anxiety and Depression: A Two-Year Prospective Study Among Norwegian Adolescents

  • Linn Nyjordet Evanger,
  • Ingvild West Saxvig,
  • Ståle Pallesen,
  • Michael Gradisar,
  • Stein Atle Lie and
  • Bjørn Bjorvatn

This study explored whether sleep duration, insomnia, social jetlag, and circadian preference predicted adolescents’ risk of anxiety and depression two years later. High school students initially aged 16–17 years were, in 2019 and 2021, i...

  • Article
  • Open Access
2,008 Views
13 Pages

Exploring Lifestyles and Sensory Processing Patterns of Toddlers in Relation to Sleep Patterns Using Body Movement Analysis

  • Azusa Ono,
  • Yoshiko Iwatani,
  • Arika Yoshizaki,
  • Tomoko Nishimura,
  • Ikuko Mohri,
  • Kuriko Kagitani-Shimono and
  • Masako Taniike

This study explored the impact of lifestyle habits and sensory processing patterns on sleep quality by analyzing body movements (BMs) during the first and last 3 h of sleep in toddlers. We collected cross-sectional data about sleep-related habits fro...

  • Article
  • Open Access
1 Citations
4,114 Views
23 Pages

Comparison of Tailored Versus Standard Group Cognitive Behavioral Therapy for Shift Worker Insomnia: A Randomized Controlled Trial

  • Tanja Grünberger,
  • Christopher Höhn,
  • Manuel Schabus,
  • Belinda Angela Pletzer and
  • Anton-Rupert Laireiter

Shift workers are at increased risk of insomnia. The standard treatment (cognitive behavioral therapy for insomnia) poses significant challenges for this demographic due to irregular work and sleep schedules. New approaches are still considered insuf...

  • Article
  • Open Access
4 Citations
2,564 Views
16 Pages

Sleep Problems and Sleep Quality in the General Adult Population Living in South Tyrol (Italy): A Cross-Sectional Survey Study

  • Dietmar Ausserhofer,
  • Giuliano Piccoliori,
  • Adolf Engl,
  • Pasqualina Marino,
  • Verena Barbieri,
  • Stefano Lombardo,
  • Timon Gärtner and
  • Christian J. Wiedermann

It remains unclear how sleep health has developed in the general population after the COVID-19 pandemic. This study aimed to (1) investigate the prevalence of sleep problems and poor sleep quality and (2) explore the associated sociodemographic and h...

  • Article
  • Open Access
3 Citations
3,007 Views
16 Pages

Risk of Major Depression Associated with Excessive Daytime Sleepiness in Apneic Individuals

  • Matteo Conenna,
  • Camille Point,
  • Benjamin Wacquier,
  • Jean-Pol Lanquart and
  • Matthieu Hein

Considering the frequent co-occurrence of major depressive disorder and excessive daytime sleepiness in apneic individuals, this study aimed to explore the relationship between excessive daytime sleepiness and the risk of developing major depressive...

  • Article
  • Open Access
2,339 Views
18 Pages

Sleep Patterns, Excessive Daytime Sleepiness, and Sleep Disturbance Among First Nations Children in Saskatchewan

  • Chandima P. Karunanayake,
  • Charlene Thompson,
  • Meera J. Kachroo,
  • Donna C. Rennie,
  • Warren Seesequasis,
  • Jeremy Seeseequasis,
  • James A. Dosman,
  • Mark Fenton,
  • Vivian R. Ramsden and
  • Punam Pahwa
  • + 4 authors

Sleep is essential for maintaining both mental and physical well-being. It plays a critical role in the health and development of children. This study investigates sleep patterns and habits of First Nations children, the prevalence of sleep disturban...

  • Article
  • Open Access
2,038 Views
13 Pages

The Sleep–Wake Cycle Pattern of a Blind Trail Ultramarathon Runner and His Guide: The World’s First Case

  • Larissa Quintão Guilherme,
  • Julia Pagotto Matos,
  • Ana Claudia Pelissari Kravchychyn,
  • Marco Tulio De Mello,
  • Paulo Roberto dos Santos Amorim and
  • Helton de Sá Souza

Trail running has seen a surge in participants, including individuals with disabilities, particularly in ultratrail running (UTRs). Sleep–wake patterns are crucial for optimal performances in UTRs, which present unique physiological and behavio...

  • Article
  • Open Access
2 Citations
2,288 Views
18 Pages

Predicting Phenoconversion in Isolated RBD: Machine Learning and Explainable AI Approach

  • Yong-Woo Shin,
  • Jung-Ick Byun,
  • Jun-Sang Sunwoo,
  • Chae-Seo Rhee,
  • Jung-Hwan Shin,
  • Han-Joon Kim and
  • Ki-Young Jung

Isolated rapid eye movement (REM) sleep behavior disorder (iRBD) is recognized as a precursor to neurodegenerative diseases. This study aimed to develop predictive models for the timing and subtype of phenoconversion in iRBD. We analyzed comprehensiv...

  • Review
  • Open Access
8 Citations
13,354 Views
14 Pages

Circadian Regulation for Optimizing Sport and Exercise Performance

  • Garrett R. Augsburger,
  • Eric J. Sobolewski,
  • Guillermo Escalante and
  • Austin J. Graybeal

This narrative review explores the intricate relationship between circadian regulation and exercise performance, emphasizing the importance of aligning training strategies with the body’s natural physiological fluctuations. The three key mechan...

  • Article
  • Open Access
1,744 Views
14 Pages

Uncorrelated Age-Related Changes in Visuo-Spatial Working Memory Binding and Thermoregulation

  • Marine Dourte,
  • Gregory Hammad,
  • Christina Schmidt and
  • Philippe Peigneux

Ageing is associated with alterations in circadian rhythms and thermoregulation, contributing to a fragmentation of the sleep–wake cycle and possibly age-related changes in cognitive performance. In this study, we investigated the relationship...

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Clocks & Sleep - ISSN 2624-5175