Deep Slow Breathing helps in Dementia and Alzheimer’s Disease 

 Shiv Talwar, Founder, Spiritual Heritage Education Network, Waterloo, Ontario, Canada 

Introduction 

Recently, we came across convincing research showing how conscious, deep, slow breathing, mindfulness, and breath-based interventions can improve blood biomarkers of cognitive function in our aging communities and markedly slow the rate of decline in patients with dementia and Alzheimer’s disease. This technical note reports on that research.   

SHEN long realized the importance of DSB, deep, slow breathing as a readily available tool for conscious, intentional living. It invested in developing a web app called Taking Life Off Autopilot to teach, learn, and practice DSB, which runs on any device with internet access. You can access this app by clicking here. 

Foundational Research 

Deep Breathing & Cognitive Performance in Older Adults 

•     Deep and slow breathing (DSB) significantly enhances learning, memory retention, attention, working memory, and spatial perception in the elderly—an at-risk population for dementia. In a randomized study, participants who performed DSB before or after learning sessions showed greater cognitive improvements compared to controls (Park and Song 2023), (Lee, Park and Song 2023). 

Autonomic Regulation, Amyloid Clearance & Alzheimer’s Biomarkers 

•     A controlled breathing regimen (inhale–exhale cycles of 5 seconds, 20 min twice daily for four weeks) increased heart rate variability—an indicator of parasympathetic activation—and reduced blood levels of amyloid-β peptides, implicated in Alzheimer’s pathology (Abramson 2024), (Min et al. 2023) and (Min et al. 2025). 

Systematic Reviews of Breathing Interventions 

• A 2025 systematic review (10 studies) confirmed that breathing exercises improve overall cognition and memory recall, with additive benefits when combined with physical activity (Rao and Khan 2025). 

Pranayama & Mental Health: Relevance to Cognitive Well-being 

• A meta-analysis of six RCTs (517 participants) found that prāṇāyāma interventions significantly reduced symptom severity and improved quality of life in mental health conditions (e.g., PTSD, depression), with more pronounced effects for slow breathing techniques. While focused on psychiatric populations, these findings support broader cognitive-resilience potentials (Mütze, Mitzinger and Haller 2025). 
• Mindfulness, Meditation & Cognitive Decline 
• A 2025 meta-analysis of 25 RCTs (2,095 participants) on meditation (including breath-based methods) demonstrated significant improvements in global cognition, sleep quality, and health status in older adults with subjective cognitive decline, mild cognitive impairment, or Alzheimer’s (mean MMSE gain: +2.22) (Shi, et al. 2025). 
• A separate 2023 meta-analysis across 30 RCTs in older adults found that mindfulness interventions produced modest but meaningful cognitive enhancements in attention (g=0.22), long-term memory (g=0.32), and visuospatial processing (g=0.22) (Mirabito and Verhaeghen 2023). 
• Ongoing Trials: Breath Training in MCI 
• The BREATHE trial (2020–2026) is examining the synergistic effects of cognitive training and breath training—including biofeedback—on cognitive, behavioural, and daily functioning in adults aged 60–89 with normal cognition or mild cognitive impairment due to Alzheimer’s (Cognitive Training and Breath Exercises for Mild Cognitive Impairment 2020). 

Summary of Evidence 

• Controlled or slow breathing: Enhances cognitive function (memory, attention) in elderly and at-risk groups. 
• Sympathetic–parasympathetic balance: Shifts achieved through breathing can lower amyloid-β blood levels. 
• Structured breath–mind interventions: Show modest-to-moderate efficacy in improving attention, memory, and global cognition in MCI and early-stage Alzheimer’s. 
• Clinical trials underway: Investigating whether integrated cognitive and breath training can slow or reverse cognitive decline. 

These converging lines of evidence—from randomized trials, meta-analyses, and biomarker research—underscore the promise of deep breathing and breath-based mindfulness practices for maintaining cognitive health and potentially mitigating early dementia processes. 

Biological Mechanisms 

Amyloid-Beta is a critical peptide involved in the pathology of Alzheimer's disease. Its accumulation in the brain leads to the formation of amyloid plaques, which are toxic to neurons and contribute to cognitive decline. Here’s what current research reveals about the impact of deep or paced breathing on amyloid β levels: 

Impact on Plasma Amyloid-β 

• In a randomized intervention, participants (young and older adults) practiced slow-paced breathing (5-second inhale, 5-second exhale) for 20 minutes, twice daily, over four weeks. This protocol significantly reduced plasma Aβ40 and Aβ42 levels, whereas the control (normal breathing) group showed slight increases (Jungwon, et al. 2023). 
• Role of Heart Rate Variability (HRV) 
• The breathing exercises increased heart rate variability, indicating activation of the parasympathetic (vagal) nervous system, and this shift was closely linked to the reduction in amyloid-β (Jungwon, et al. 2023). 
• HRV biofeedback with slow breathing boosts cardiovascular oscillations, likely driving cascading effects: 

o It stimulates parasympathetic-mediated noradrenergic suppression o Promotes endothelial–platelet interactions, impacting amyloid-β production and clearance 

A mechanistic study in Innovation in Aging showed that high-amplitude heart-rate oscillations increased p-selectin (a marker of endothelial activity) and correlated with decreased plasma Aβ levels, suggesting improved vascular-mediated clearance (Min 2023), (Jungwon, et al. 2023). Comparable to Sleep-Like Clearance 

• Researchers propose that slow, high-amplitude HR oscillations mimic features of deep sleep—characterized by low noradrenergic tone and slower brain rhythms— potentially enhancing clearance of neurotoxic substances like amyloid-β (Dolan 2023), (Jungwon, et al. 2023). 

Summary of Biological Mechanisms 

Deep or paced breathing influences amyloid-β dynamics by: 

• ↑ HRV through parasympathetic activation 
• ↓ Noradrenergic activity, supporting brain waste clearance 
• ↑ Endothelial oscillations fostering vascular-mediated Aβ removal 

This non-pharmacological approach reduced circulating Aβ40/42 in healthy adults over just four weeks—a promising foundation for further Alzheimer’s prevention strategies. 

Step-by-step physiological Pathway 

. Slow, Deep Breathing Initiation 

• Breathing at ~5–6 breaths per minute (e.g., 5 sec inhale, 5 sec exhale) activates baroreflex and respiratory sinus arrhythmia, creating large oscillations in heart rate. 

2. Increased Heart Rate Variability (HRV) 

   • These oscillations boost HRV, a marker of parasympathetic (vagal) dominance. 

   • Vagal activation reduces sympathetic tone and noradrenaline release. 

3. Reduced Noradrenergic Activity 

   • Lower noradrenaline mimics conditions of deep sleep, which is associated with enhanced glymphatic clearance of brain waste, including amyloid-β. 

4. Enhanced Vascular Oscillations 

   • Slow breathing amplifies blood pressure and endothelial oscillations. 

   • This rhythmic vascular activity improves perivascular clearance pathways, aiding removal of amyloid-β from interstitial fluid to blood. 

5. Endothelial–Platelet Interaction 

   • Increased oscillatory shear stress upregulates markers like p-selectin, facilitating vascular transport and clearance of amyloid-β peptides. 

6. Plasma Amyloid-β Reduction 

   • Over weeks of practice (e.g., 20 min twice daily for 4 weeks), studies show significant decreases in circulating Aβ40 and Aβ42, suggesting improved systemic clearance and possibly reduced brain burden. 

Summary Flow 

Deep Breathing → HRV ↑ → Parasympathetic Tone ↑ → Noradrenaline ↓ → Sleep-like 

Clearance ↑ + Vascular Oscillations ↑ → Amyloid-β Clearance ↑ → Plasma Aβ ↓ 

Concluding Remarks 

1. The research points to a meaningful way to serve our aging community 
2. The removal of amyloid-β is transient. Stopping the practice of deep, slow breathing will increase the accumulation of amyloid-β by stopping its removal, worsening the Alzheimer's condition. 
3. Regular practice of deep, slow breathing while healthy can prevent the onset of cognitive decline, dementia, and Alzheimer’s disease. 

References 

Abramson, Ashley. 2024. "Psychology is improving brain health and aging". American Psychological Association, January. https://www.apa.orBramsong/monitor/2024/01/trends-brain-health-aging&nb…;

2020. Cognitive Training and Breath Exercises for Mild Cognitive Impairment.

https://www.alzheimers.gov/clinical-trials/cognitive-training-and-breat….

Dolan, Eric W. 2023. "Breathing exercises show potential in modulating Alzheimer’s biomarkers, study finds." PsyPost. https://www.psypost.org/breathing-exercisesshow-potential-in-modulating….

Jungwon, Min, Jeremy Rouanet, Alessandra Cadete Martini, Kaoru Nashiro, and Hyun Joo Yoo. 2023. "Modulating heart rate oscillation affects plasma amyloid beta and tau levels in younger and older adults." Scientific Reports. Accessed December 2025. https://doi.org/10.1038/s41598-023-30167-0.

Lee, Su-Ha, Dae-Sung Park, and Chang-Ho Song. 2023. "The Effect of Deep and Slow Breathing on Retention and Cognitive Function in the Elderly Population." Healthcare 111 (6). https://doi.org/10.1007/978-3-031-85908-3_4410.3390/healthcare11060896.

Min, J., Rouanet, J., Martini, A. C., Nashiro, K., Yoo, H. J., Porat, S., Cho, C., Wan, J., Cole, S. W., Head, E., Nation, D. A., Thayer, J. F., & Mather, M. (2023). Modulating heart rate oscillation affects plasma amyloid beta and tau levels in younger and older adults. Scientific Reports, 13(1), 3967. https://doi.org/10.1038/s41598-023-30167-0

Min, J., Rouanet, J., Cole, S., Nashiro, K., Yoo, H. J., Cho, C., Head, E., & Mather, M. 2023. 

"POTENTIAL MECHANISMS THROUGH WHICH INDUCING HEART RATE OSCILLATIONS AFFECTS PLASMA AMYLOID BETA LEVELS." Innovation in Aging 7(Supplemental_1) (68). Accessed December 22, 2025. doi:10.1093/geroni/igad104.0219. 

Mirabito, Geazia, and Paul Verhaeghen. 2023. "The Effects of Mindfulness Interventions on Older Adults’ Cognition: A Meta-Analysis." The Journals of Gerontology, March 3. https://doi.org/10.1093/geronb/gbac143.

Mütze, Christian, Dietmar Mitzinger, and Heidemarie Haller. 2025. "Effectiveness of pranayama for mental disorders: a systematic review and meta-analysis of randomized controlled trials." Front. Psychiatr, August 13. https://doi.org/10.3389/fpsyt.2025.1616996.

Park, Dae-Sung, and Chang-Ho Song. 2023. "he Effect of Deep and Slow Breathing on Retention and Cognitive Function in the Elderly Population." Healthcare.Https://doi.org/10.3390/healthcare11060896.

Rao, s, and A Khan. 2025. "Effects of Breathing Exercises on Cognition: A PRISMA Guided Systematic Review. https://doi.org//10.1007/978-3-031-85908-3_44.

Shi, Jiaxin, Hao Tian, Jingwen Wei, Wenhan Xu, Qin Luo, and Jin Peng. 202https://doi.org/10.1007/978-3-031-85908-3_445. "Meditation for subjective cognitive decline, mild cognitive impairment and Alzheimer’s disease: a systematic review and meta-analysis of randomized controlled trials." Front. Public Health, May 29. https://doi.org/10.3389/fpubh.2025.1524898.