Episode 15 – This Week in Heart Rate Variability

Welcome to this week's exploration of the latest HRV science. In Episode 15, we discuss nine newly published studies that expand our understanding of HRV in mental health, physiology, chronic illness, and digital health innovation. This episode highlights remote biofeedback, pediatric heart dynamics, pregnancy and thyroid status, elite performance, cardiac rehabilitation, personalized training prediction, global research trends, autoimmune flare detection, and neurostimulation safety.

Featured Studies:

Remote HRV Biofeedback and Mental Health

“Efficacy and Methodology of Remote Heart Rate Variability Biofeedback Interventions for Mental Health: A Systematic Review and Meta-Analysis”

Vann-Adibe et al., Applied Psychophysiology and Biofeedback (2025)

https://link.springer.com/article/10.1007/s10484-025-09750-w

Pediatric HRV and Cardiac Complexity

“Age-dependent patterns of cardiac complexity unveiled by topological data analysis of pediatric heart rate variability”

Domínguez-Monterroza et al., PLOS ONE (2025)

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0337620

Subclinical Hypothyroidism in Pregnancy and HRV

“Comparative Evaluation of Thyroid Profiles and Heart Rate Variability in Newly Diagnosed Subclinical Hypothyroid and Euthyroid Pregnant Women”

Singh et al., Cureus (2025)

https://www.cureus.com/articles/427419-comparative-evaluation-of-thyroid-profiles-and-heart-rate-variability-in-newly-diagnosed-subclinical-hypothyroid-and-euthyroid-pregnant-women?score_article=true#!/

Performance Optimization in Firefighters

“Mental imagery and breathing exercises integrated into a standardized warm-up routine enhance sympathetic activation and optimize muscular performance in firefighters”

Biéchy et al., PLOS ONE (2025)

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0337431

Innovative Respiratory-Synchronized Pacemaker

University of Auckland research feature: “Pacemaker could help the heart heal”

Paton, Ben-Tal, Nogaret, and Stiles

https://www.auckland.ac.nz/en/news/2025/12/02/pacemaker-could-help-heart-heal.html

HRV and Personalized Fitness Modeling

“Advancing training effectiveness prediction in mass sport through longitudinal data: A mathematical model approach based on the Fitness-Fatigue Model”

Wang et al., PLOS ONE (2025)

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0337824

Global Trends in HRV Research

“A Two-Decade Bibliometric Analysis of Heart Rate Variability Research (2005–2024)”

Sharma et al., Psychiatry Research (2025)

https://www.sciencedirect.com/science/article/pii/S1471015325001254?dgcid=author

Predicting Rheumatoid Arthritis Flares with Wearables

“Wearable devices detect physiological changes that precede and are associated with symptomatic and inflammatory rheumatoid arthritis flares”

Sharma et al., Scientific Reports (2025)

https://www.nature.com/articles/s41598-025-29748-y

Safety of Paired Associative Stimulation in SCI Rehab

“Heart rate variability in patients with incomplete spinal cord injury during a single session of paired associative stimulation”

Haakana et al., Scientific Reports (2025)

https://www.nature.com/articles/s41598-025-25802-x