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Frontiers in Neuroscience|January 11, 2021
Corrigendum: A Practical Guide to Resonance Frequency Assessment for Heart Rate Variability BiofeedbackFred Shaffer, Zachary M MeehanApplied Psychophysiology and Biofeedback|March 20, 2024
Do Longer Exhalations Increase HRV During Slow-Paced Breathing?Zachary M Meehan, Fred ShafferApplied Psychophysiology and Biofeedback|December 5, 2022
Adding Core Muscle Contraction to Wrist-Ankle Rhythmical Skeletal Muscle Tension Increases Respiratory Sinus Arrhythmia and Low-Frequency PowerZachary M Meehan, Fred ShafferApplied Psychophysiology and Biofeedback|June 6, 2022
An Undergraduate Program with Heart: Thirty Years of Truman HRV ResearchFred Shaffer, Zachary M MeehanFrontiers in Neuroscience|October 29, 2020
A Practical Guide to Resonance Frequency Assessment for Heart Rate Variability BiofeedbackFred Shaffer, Zachary M MeehanApplied Psychophysiology and Biofeedback|March 8, 2022
Rhythmic Skeletal Muscle Tension Increases Heart Rate Variability at 1 and 6 Contractions Per MinuteFred Shaffer, Donald Moss, Zachary M MeehanFrontiers in Neuroscience|December 17, 2020
A Critical Review of Ultra-Short-Term Heart Rate Variability Norms ResearchFred Shaffer, Zachary M Meehan, Christopher L ZerrJournal of Adolescence|July 1, 2026
A Meta-Analysis of Susceptibility to Peer Influence Effects in Adolescence: The Role of Method of Influence and Type of BehaviorZachary M Meehan, Julie A HubbardGlobal Advances in Health and Medicine|February 20, 2015
Heart Rate Variability: New Perspectives on Physiological Mechanisms, Assessment of Self-regulatory Capacity, and Health riskRollin McCraty, Fred ShafferFrontiers in Public Health|October 17, 2017
An Overview of Heart Rate Variability Metrics and NormsFred Shaffer, J P GinsbergPageof 2