Frontier mental health research: psychedelics & drug studies

Each month our editorial team sifts through hundreds of papers and curates notable findings—for practitioners and informed readers who want to stay current with the evidence. Subscribe to the monthly Research Digest for expert analysis and concise summaries of key papers.

14 papers

Sleep timing, sleep consistency, and health in adults: a systematic review

Jean‐Philippe Chaput, Caroline Dutil, Ryan B. Featherstone, Robert Ross, Lora Giangregorio, Travis J. Saunders, et al.

This review looked at 41 studies with 92,340 adults to see how sleep timing and day-to-day regularity relate to health. It found that going to bed or waking up later, and having more variable sleep patterns, were generally linked to worse health. Social jetlag was linked to worse health, while…

Sleep and related disorders Sleep and Wakefulness Research Sleep and Work-Related Fatigue

The effects of physical activity on cortisol and sleep: A systematic review and meta-analysis

Len De Nys, Kerry Anderson, Esther Frema Ofosu, Gemma C. Ryde, Jenni Connelly, Anna C. Whittaker
Psychoneuroendocrinology Summary & key facts 2022 227 citations

This review combined results from 10 intervention studies to see if physical activity programs change cortisol (a stress hormone) and sleep in adults. The pooled results found lower cortisol after activity programs and some improvement in sleep quality. The authors say the evidence is moderate for cortisol and low for…

Circadian rhythm and melatonin Physical Activity and Health Sleep and related disorders

On the nature of burnout–insomnia relationships: A prospective study of employed adults

Galit Armon, Arie Shirom, Itzhak Shapira, Samuel Melamed

This study followed 1,356 apparently healthy, employed adults over about 18 months to see how burnout and insomnia change together. Using standard questionnaires, the researchers found that higher burnout predicted new cases of insomnia and higher insomnia predicted new cases of burnout, even after adjusting for depression and other factors.…

Health, psychology, and well-being Sleep and related disorders Workplace Health and Well-being

Effects of Singing Bowl Sound Meditation on Mood, Tension, and Well-being: An Observational Study

Tamara L. Goldsby, Michael E. Goldsby, Mary McWalters, Paul J. Mills

This observational study tested Tibetan singing bowl sound meditation with 62 adults (mean age 49.7). After the session, people reported less tension, anger, fatigue, and depressed mood, and higher spiritual well-being. People who had never tried this meditation before showed a larger drop in tension than people who had experience.…

Music Therapy and Health Neuroscience and Music Perception Sleep and related disorders

Neurobiological Changes Induced by Mindfulness and Meditation: A Systematic Review

Andrea Calderone, Dèsiréè Latella, Federica Impellizzeri, Paolo De Pasquale, Fausto Famà, Angelo Quartarone, et al.
Biomedicines Summary & key facts 2024 49 citations

This systematic review of research up to 2024 found that meditation and mindfulness are linked to measurable brain changes and to better emotional regulation, cognition, and stress resilience. Many studies report thicker cortex in certain areas, lower amygdala reactivity, changes in brain connectivity and neurotransmitters, and improvements in anxiety, depression,…

Mindfulness and Compassion Interventions Music Therapy and Health Sleep and related disorders

Interventions for Sleep Disturbance in Bipolar Disorder

Allison G Harvey, Kate A Kaplan, Adriane Soehner
PubMed Central (PMC) Summary & key facts 2015 45 citations

This review explains that sleep problems are common in bipolar disorder and are tied to worse mood, more relapse, and more daily problems. The authors describe non-drug treatments for sleep, especially adapted cognitive behavioral therapy for insomnia (CBT-I), and note some evidence and limits for these approaches.

Bipolar Disorder and Treatment Sleep and related disorders Sleep and Wakefulness Research

Differential Experimental Effects of a Short Bout of Walking, Meditation, or Combination of Walking and Meditation on State Anxiety Among Young Adults

Meghan K. Edwards, Simon Rosenbaum, Paul D. Loprinzi

This randomized trial tested whether a single short bout of walking, meditation, or a combination changed short-term anxiety in young adults. One hundred ten university students (mean age 21.4 years) were randomly assigned to 10 minutes of walking, 10 minutes of meditation, walking then meditation, meditation then walking, or sitting.…

Mindfulness and Compassion Interventions Sleep and related disorders Urban Green Space and Health

Are Sweet Dreams Made of These? Understanding the Relationship Between Sleep and Cannabis Use

Dalton Edwards, Francesca M. Filbey

This is the Modern Slavery and Human Trafficking Statement for The Scott Trust, Guardian Media Group (GMG) and The Scott Trust Endowment Limited (STEL) for the year ended 31 March 2025. It sets out policies, checks, and actions the organisations use to try to prevent modern slavery in their operations,…

Cannabis and Cannabinoid Research Sleep and related disorders Sleep and Wakefulness Research

Impact of Himalayan Singing Bowls Meditation Session on Mood and Heart Rate Variability – An Observational Study

Saharsh Panchal, Fariburz Irani, Gunjan Y Trivedi

This small observational study checked mood and heart-rate measures before and after one 40-minute seated Himalayan singing bowl (HSB) sound-bath. After the session, 77 people reported higher positive affect and lower negative affect on the PANAS mood survey. A smaller group (17) filling the POMS survey reported less tension, anger,…

Heart Rate Variability and Autonomic Control Mindfulness and Compassion Interventions Sleep and related disorders

Is a Brief Body Scan Helpful for Adolescent Athletes’ Sleep Problems and Anxiety Symptoms?

Lis Johles, Annika Norell‐Clarke, Carolina Lundqvist, Markus Jansson‐Fröjmark, Kirsten Mehlig
Mindfulness Summary & key facts 2023 2 citations

In this randomized study of 206 Swedish adolescent athletes (mean age 17), researchers tested short body-scan exercises against relaxation exercises, given for either 4 or 8 weeks, and measured sleep problems and anxiety at 0, 4, 8, and 16 weeks. All four groups showed some improvement over time, but only…

Mindfulness and Compassion Interventions Sleep and related disorders Sleep and Wakefulness Research

How Are Brain Fog Symptoms Related to Diet, Sleep, Mood and Gastrointestinal Health? A Cross-Sectional Study

Canan Altınsoy, Derya Dikmen
Medicina Summary & key facts 2025 1 citation

This cross-sectional survey (data collected 1 July–15 December 2022) asked people about brain fog, diet, sleep, mood, and gut symptoms. The study found that people who had COVID-19 — especially those with reinfection — and women reported higher brain fog scores. Gastrointestinal symptoms and mood scores were linked to worse…

Long-Term Effects of COVID-19 Sleep and related disorders Sleep and Wakefulness Research

Medicinal cannabis in the management of anxiety disorders: A systematic review

L. Roberts, Elizabeth Sorial, Charley Budgeon, Kenneth Lee, David B. Preen, Craig Cumming
Psychiatry Research Summary & key facts 2025 1 citation

The authors reviewed 57 studies of medicinal cannabis for adults with anxiety disorders. Many studies—including over 90% that looked at CBD or THC—reported reduced anxiety symptoms, but the overall study quality was low (mean bias score 62.9/100) and long-term benefits and effects on quality of life are unclear. The review…

Cannabis and Cannabinoid Research Sleep and related disorders Sleep and Wakefulness Research
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