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BCIA Continuing Education Posts
The BioSource Faculty Explain Peer-Reviewed Science


Steven Porges' HRV Journey
Heart rate variability is not a mistake in the system. It is a living signature of how the nervous system is regulating the heart in real-time.
Fred Shaffer
Dec 6, 202510 min read


Honoring an HRV Pioneer: Dr. Paul Lehrer's Journey Through the Heart of Biofeedback
Dr. Paul Lehrer offered a masterclass in humility, collaboration, and the relentless pursuit of understanding how the body heals itself.
Fred Shaffer
Nov 15, 202512 min read


Slow-Paced Contraction Training with the Optimal HRV Application
Clients can perform SPC correctly with minimal instruction.
Fred Shaffer
Nov 8, 202510 min read


Dr. Richard Gevirtz's Journey from GSR to Heart Rate Variability
Dr. Gevirtz's journey began in 1964 as an undergraduate psychology major at the University of Wisconsin.
Fred Shaffer
Oct 2, 20259 min read


5-Min Science: The Task Force Report Remains Relevant
The 1996 Task Force Report remains deeply influential today.
BioSource Faculty
Apr 27, 20256 min read


A Comprehensive Breathing Myths Guide
Breathing ensures healthy CO2 levels. The main functions of breathing are gas exchange and acid-base (pH) regulation.
BioSource Faculty
Apr 24, 202527 min read


5-Second Science: Wearable Composite Health Scores Require Validation
Future standards must include open algorithms and population-level validation to increase clinical trust.
BioSource Faculty
Apr 21, 20254 min read


5-Minute Science: VLF Activity Is Not Sympathetic
SNS activity is too fast and irregular to be a primary driver of VLF rhythms.
BioSource Faculty
Mar 12, 20255 min read


5-Min Science: The Brain-Heart Connection
Have you ever wondered how your brain influences your heartbeat?
BioSource Faculty
Dec 23, 20244 min read


5-Min Science: The Autonomic Effects of Infraslow Frequency Neurofeedback
The ISF group showed significant improvements, including reduced systolic blood pressure, muscle tension, and skin conductance.
BioSource Faculty
Nov 12, 20246 min read


Neuroscience Breakthroughs Since Graduate School - Part 7: Emotion
Mindfulness research has challenged the popular belief that we should be able to dismiss difficult emotions.
BioSource Faculty
Oct 23, 202439 min read


5-Min Science: Daily Behavior Can Affect Brain Connectivity for Weeks
Brain connectivity is not static but fluctuates in response to daily environmental and physiological factors.
BioSource Faculty
Oct 12, 20247 min read


The Vagus Nerve's Role in Heart Rate Variability
Vagal activity and parasympathetic nervous system function produce respiratory sinus arrhythmia (RSA) and heart rate variability (HRV).
BioSource Faculty
Sep 24, 202414 min read


A Comprehensive Guide to HRV Myths
This review addresses 14 misconceptions regarding cardiovascular health, HRV measurement, and HRV biofeedback training.
BioSource Faculty
Aug 7, 202423 min read


Upgrade Your HRV Biofeedback System
If you don’t correct dysfunctional breathing patterns like overbreathing, they can compromise the effectiveness of HRVB training.
BioSource Faculty
Jun 15, 20244 min read


Provide Slow-Paced Contraction Training Using the Optimal HRV Application
Slow-paced contraction (SPC) increases heart rate variability (HRV) as effectively as slow-paced breathing (SPB).
BioSource Faculty
May 26, 20248 min read


Should You Add Nonlinear HRV Metrics to Your Practice?
Nonlinear heart rate variability metrics have emerged as valuable tools for assessing various physiological and pathological conditions.
BioSource Faculty
Apr 29, 202415 min read


Do longer exhalations increase HRV during slow-paced breathing?
Download our open-access Applied Psychophysiology and Biofeedback inhalation-to-exhalation ratio article.
Fred Shaffer
Mar 24, 20241 min read


BCIA Essential Skills: ECG
This post covers the ECG Signal Source, ECG Sensors, Skin Preparation, ECG Signal, Sampling Rate, Placements, Artifacts, and Tracking Tests.
BioSource Faculty
Aug 31, 202313 min read


BCIA Essential Skills: Blood Volume Pulse
Blood volume pulse (BVP) is an indispensable tool for evaluating and training clients for chronic pain, hypertension, and performance.
BioSource Faculty
Aug 27, 202313 min read
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