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Gaël Chételat

32 papers in the library · 578 citations · publishing 2010-2026

Papers

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Effects of an 18-month meditation training on subjective and objective sleep quality in older adults: a secondary analysis of the Age-Well randomized controlled trial

medRxiv October 2, 2026 Pierre Champetier, Anaïs Hamel, Stéphane Rehel et al. preprint

Abstract Study objectives Aging is associated with increased sleep complaints and changes in sleep architecture, microstructure and rest-activity rhythms. Meditation-based interventions have shown benefits on subjective sleep quality, but their effects on objective sleep parameters remain largely underexplored. This study investigated the effects of an 18-month meditation intervention on sleep...

Exploring the effects of mindfulness meditation on resting-state functional connectivity: an overview.

Reviews in the Neurosciences June 3, 2026 Thomas Le François, Charlotte E Hilberdink, Bérengère Guillery-Girard et al.

Mindfulness meditation has received growing interest in research over the past decades. Mindfulness meditation training (MMT) can be employed as a mental practice to improve cognitive skills such as attention and emotion regulation and may promote well-being. Neuroimaging studies have emerged to understand the effects of MMT on brain functioning. However, no review exists on the effects of MMT...

DOI: 10.1515/revneuro-2026-0019 (opens in new tab) Full text (opens in new tab) Brain networks Functional connectivity Meditation-naïve adults Mindfulness meditation +1

Impact of meditation on brain age derived from multimodal neuroimaging in experts and older adults from a randomized trial

Scientific Reports October 28, 2025 Sacha Haudry, Natacha Lambert, Christian Gaser et al.

Meditation is thought to promote healthy aging by improving mental health, preserving brain integrity and reducing Alzheimer's disease risk. We examined the impact of long-term meditation expertise and an 18-month meditation training on brain aging in older adults using machine learning. We included 25 Older Expert Meditators (OldExpMed) with > 20 years of practice and 135 Cognitively...

DOI: 10.1038/s41598-025-21490-9 (opens in new tab) Full text (opens in new tab) Meditation Randomized controlled trial Neuroimaging Brain aging +6

Meditation training and non-native language training both reduce older adults loneliness in the age-well randomized controlled trial.

Scientific Reports September 29, 2025 Flora Hähnel, Antoine Lutz, Gaël Chételat et al.

Loneliness is a key predictor for mortality and a risk factor for dementia. Meditation training appears to be a promising intervention for loneliness in older adults, but long-term randomized controlled trials with an active control group are scarce. To fill this gap, this secondary analysis of the three-armed clinical randomized controlled Age-Well trial compares the impact of an 18-month...

EEG Brain Rhythms During Resting-State Wakefulness and Sleep in Elderly Expert Meditators.

Journal of Sleep Research July 29, 2025 Pierre Champetier, Anaïs Hamel, Claire André et al.

Meditation practice has been shown to impact resting-state EEG activity in expert meditators, but its benefits on sleep, which is particularly affected with age, are poorly understood. Our aim was to better understand the effects of long-term meditation practice on resting-state EEG and sleep in older adults. Twenty-seven elderly expert meditators (mean age ± SD: 70.7 ± 5.0 years) were compared...

Examining cognitive differences in expert meditators and non-meditators older adults.

Scientific Reports May 15, 2025 Florence Requier, Hamed Mohammadi, Harriet Demnitz-King et al.

With aging, slight changes in some cognitive processes can be observed. Therefore, we aimed to assess if meditation expertise is associated with preserved cognition in key domains affected in aging. We used data from two older-adult samples of the Medit-Ageing Age-well Study: 135 non-meditators and 27 expert meditators. We examined group differences in four objective cognitive domains...

DOI: 10.1038/s41598-025-00226-9 (opens in new tab) Full text (opens in new tab) Attention Executive function Expert meditators Older age +9

ENIGMA-Meditation: Worldwide Consortium for Neuroscientific Investigations of Meditation Practices.

Biological Psychiatry: Cognitive Neuroscience and Neuroimaging April 1, 2025 Saampras Ganesan, Fernando A Barrios, Ishaan Batta et al. 6 citations

Meditation is a family of ancient and contemporary contemplative mind-body practices that can modulate psychological processes, awareness, and mental states. Over the last 40 years, clinical science has manualized meditation practices and designed various meditation interventions that have shown therapeutic efficacy for disorders including depression, pain, addiction, and anxiety. Over the past...

The evolution of subjective cognition after meditation training in older people: a secondary analysis of the three-arm age-well randomized controlled trial.

Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition March 1, 2025 Florence Requier, Harriet Demnitz-King, Eric Frison et al.

Aging is associated with cognitive changes, even in the absence of brain pathology. This study aimed to determine if meditation training, by comparison to active and passive control groups, is linked to changes in the perception of cognitive functioning in older adults. One hundred thirty-four healthy older participants from the Age-Well Randomized Clinical Trial were included: 45 followed a...

Effects of an 18-month meditation training on dynamic functional connectivity states in older adults: Secondary analyses from the Age-Well randomized controlled trial

Imaging Neuroscience 2025 Sacha Haudry, Sophie Dautricourt, Julie Gonneaud et al.

Meditation training in older adults has been proposed as a non-pharmacological intervention to promote healthy aging and lower the risks of developing Alzheimer's disease (AD). Resting-state dynamic functional network connectivity (dFNC) highlighted two brain states, the "strongly connected" and "default mode network (DMN)-negatively connected" states, associated with protective factors for...

DOI: 10.1162/imag.a.33 (opens in new tab) Full text (opens in new tab) Meditation Randomized controlled trial Functional connectivity Gerontology +1

Effect of an 18-Month Meditation Training on Telomeres in Older Adults: A Secondary Analysis of the Age-Well Randomized Controlled Trial.

Biological Psychiatry Global Open Science 2025 Perla Kaliman, María Jesús Álvarez-López, Asrar Lehodey et al.

Shorter telomeres are associated with increased risk of cognitive decline and age-related diseases. Developing interventions to promote healthy aging by preserving telomere integrity is of paramount importance. Here, we investigated the effect of an 18-month meditation intervention on telomere length (TL) measures in older people without cognitive impairment. A total of 137 adults age ≥65 years...

Decoding meditation mechanisms underlying brain preservation and psycho-affective health in older expert meditators and older meditation-naive participants.

Scientific Reports November 27, 2024 Sacha Haudry, Anne-Laure Turpin, Brigitte Landeau et al. 3 citations

Meditation is a mental training approach that can improve mental health and well-being in aging. Yet the underlying mechanisms remain unknown. The Medit-Ageing model stipulates that three mechanisms - attentional, constructive, and deconstructive - upregulate positive psycho-affective factors and downregulate negative ones. To test this hypothesis, we measured brain structural MRI and...

Decoding meditation mechanisms underlying brain preservation and psycho-affective health in older expert meditators and older meditation-naive participants.

Scientific Reports November 27, 2024 Sacha Haudry, Anne-Laure Turpin, Brigitte Landeau et al. 3 citations

Meditation is a mental training approach that can improve mental health and well-being in aging. Yet the underlying mechanisms remain unknown. The Medit-Ageing model stipulates that three mechanisms - attentional, constructive, and deconstructive - upregulate positive psycho-affective factors and downregulate negative ones. To test this hypothesis, we measured brain structural MRI and...

Meditation dosage predicts self- and teacher-perceived responsiveness to an 18-month randomised controlled trial

Scientific Reports November 2, 2024 Marco Schlosser, Julie Gonneaud, Stefano Poletti et al. 2 citations

Understanding the factors that predict why some individuals perceive to respond more to meditation training than others could impact the development, efficacy, adherence levels, and implementation of meditation-based interventions. We investigated individual-level variables associated with self- and teacher-perceived responsiveness to longer-term meditation training. This study presents a...

DOI: 10.1038/s41598-024-77069-3 (opens in new tab) Full text (opens in new tab) Meditation Disengagement theory Psychological intervention Expectancy theory +6

Exploring the Embodied Mind: Functional Connectome Fingerprinting of Meditation Expertise.

Biological Psychiatry Global Open Science November 1, 2024 Sébastien Czajko, Jelle Zorn, Loïc Daumail et al. 5 citations

Short mindfulness-based interventions have gained traction in research due to their positive impact on well-being, cognition, and clinical symptoms across various settings. However, these short-term trainings are viewed as preliminary steps within a more extensive transformative path, presumably leading to long-lasting trait changes. Despite this, little is still known about the brain...

Impact of mindfulness-based and health self-management interventions on mindfulness, self-compassion, and physical activity in older adults with subjective cognitive decline: A secondary analysis of the SCD-Well randomized controlled trial.

Alzheimer S and Dementia Diagnosis Assessment and Disease Monitoring 2024 Ylenia D'elia, Tim Whitfield, Marco Schlosser et al.

Older adults experiencing subjective cognitive decline (SCD) have a higher risk of dementia. Reducing this risk through behavioral interventions, which can increase emotional well-being (mindfulness and compassion) and physical activity, is crucial in SCD. SCD-Well is a multicenter, observer-blind, randomized, controlled, superiority trial. Three hundred forty-seven participants (mean [standard...

Effects of Meditation Training and Non-Native Language Training on Cognition in Older Adults: A Secondary Analysis of a Randomized Clinical Trial.

JAMA Network Open July 3, 2023 Harriet Demnitz-King, Florence Requier, Tim Whitfield et al.

Nonpharmacological interventions are a potential strategy to maintain or promote cognitive functioning in older adults. To investigate the effects of 18 months' meditation training and 18 months' non-native language training on cognition in older adults. This study was a secondary analysis of the Age-Well trial, an 18-month, observer-masked, randomized clinical trial with 3 parallel arms....

Effects of a mindfulness-based intervention and a health self-management programme on psychological well-being in older adults with subjective cognitive decline: Secondary analyses from the SCD-Well randomised clinical trial.

PLoS One 2023 Marco Schlosser, Harriet Demnitz-King, Thorsten Barnhofer et al. 13 citations

Older adults with subjective cognitive decline (SCD) recruited from memory clinics have an increased risk of developing dementia and regularly experience reduced psychological well-being related to memory concerns and fear of dementia. Research on improving well-being in SCD is limited and lacks non-pharmacological approaches. We investigated whether mindfulness-based and health education...

An 18-month meditation training selectively improves psychological well-being in older adults: A secondary analysis of a randomised controlled trial.

PLoS One 2023 Marco Schlosser, Olga Klimecki, Fabienne Collette et al. 6 citations

As the world population is ageing, it is vital to understand how older adults can maintain and deepen their psychological well-being as they are confronted with the unique challenges of ageing in a complex world. Theoretical work has highlighted the promising role of intentional mental training such as meditation practice for enhancing human flourishing. However, meditation-based randomised...

An 18-month meditation training selectively improves psychological well-being in older adults

October 31, 2022 Marco Schlosser, Olga Klimecki, Fabienne Collette et al.

Objectives: As the world population is ageing, it is vital to understand how older adults can maintain and deepen their psychological well-being as they are confronted with the unique challenges of ageing in a complex and vulnerable world. Theoretical work has highlighted the promising role of intentional mental training such as meditation practice for enhancing human flourishing. However,...

DOI: 10.31231/osf.io/desyu (opens in new tab) Meditation Mindfulness Intervention counseling Clinical psychology +5

Effect of an 18-Month Meditation Training on Regional Brain Volume and Perfusion in Older Adults

JAMA Neurology October 10, 2022 Gaël Chételat, Antoine Lutz, Olga Klimecki et al. 45 citations

Importance: No lifestyle-based randomized clinical trial directly targets psychoaffective risk factors of dementia. Meditation practices recently emerged as a promising mental training exercise to foster brain health and reduce dementia risk. Objective: To investigate the effects of meditation training on brain integrity in older adults. Design, Setting, and Participants: Age-Well was a...

Effects of a mindfulness-based versus a health self-management intervention on objective cognitive performance in older adults with subjective cognitive decline (SCD): a secondary analysis of the SCD-Well randomized controlled trial.

Alzheimer's Research & Therapy September 6, 2022 Tim Whitfield, Harriet Demnitz-King, Marco Schlosser et al.

Older individuals with subjective cognitive decline (SCD) perceive that their cognition has declined but do not show objective impairment on neuropsychological tests. Individuals with SCD are at elevated risk of objective cognitive decline and incident dementia. Non-pharmacological interventions (including mindfulness-based and health self-management approaches) are a potential strategy to...

The protective effect of mindfulness and compassion meditation practices on ageing: Hypotheses, models and experimental implementation.

Ageing Research Reviews October 1, 2021 Antoine Lutz, Gaël Chételat, Fabienne Collette et al.

Alzheimer's disease (AD) represents a major health and societal issue; there is no treatment to date and the pathophysiological mechanisms underlying this disease are not well understood. Yet, there is hope that AD risk factors and thus the number of AD cases can be significantly reduced by prevention measures based on lifestyle modifications as targeted by non-pharmacological preventive...

The Effect of Mindfulness-based Programs on Cognitive Function in Adults: A Systematic Review and Meta-analysis

Neuropsychology Review August 4, 2021 Tim Whitfield, Thorsten Barnhofer, Rebecca L. Acabchuk et al. 193 citations

Mindfulness-based programs (MBPs) are increasingly utilized to improve mental health. Interest in the putative effects of MBPs on cognitive function is also growing. This is the first meta-analysis of objective cognitive outcomes across multiple domains from randomized MBP studies of adults. Seven databases were systematically searched to January 2020. Fifty-six unique studies (n = 2,931) were...

Effects of a Mindfulness-Based Intervention versus Health Self-Management on Subclinical Anxiety in Older Adults with Subjective Cognitive Decline: The SCD-Well Randomized Superiority Trial.

Psychotherapy and Psychosomatics April 19, 2021 Natalie L. Marchant, Thorsten Barnhofer, Roxane Coueron et al.

Introduction: Older adults experiencing subjective cognitive decline (SCD) have a heightened risk of developing dementia and frequently experience subclinical anxiety, which is itself associated with dementia risk. Objective: To understand whether subclinical anxiety symptoms in SCD can be reduced through behavioral interventions. Methods: SCD-Well is a randomized controlled trial designed to...

Measuring psychological mechanisms in meditation practice: Using a phenomenologically grounded classification system to develop theory-based composite scores

April 13, 2021 Marco Schlosser, Thorsten Barnhofer, Florence Requier et al. 2 citations

Objectives: Deepening our understanding of the mechanisms by which meditation practices impact well-being and human flourishing is essential for advancing the science of meditation. The phenomenologically grounded classification system introduced by Dahl, Lutz, and Davidson (2015) distinguishes attentional, constructive, and deconstructive forms of meditation based on the psychological...