The BioSource Blog

BioSource Faculty Explain Core Concepts Based on
Peer-Reviewed Science

Four Heart Rate Variability Myths

Four HRV myths are Heart Rate Variability Is Bad, Stability Is Good, The Sympathetic Nervous System Plays a Major Role in Short-Term HRV,...

Rethinking the Resonance Frequency (RF) - Part 3: Slow-Paced Contraction

Slow-paced contraction (SPC) provides an alternative and unproven method for determining the resonance frequency (RF) in one or two...

Rethinking the Resonance Frequency (RF) - Part 2: Slow-Paced Breathing

Resonance frequency (RF) assessment identifies the stimulation frequency producing the greatest amplitude heart rate oscillations in one...

Rethinking the Resonance Frequency (RF) - Part 1: Understanding Resonance

Randomized controlled trials have demonstrated the efficacy of HRV biofeedback for diverse clinical disorders like depression, diabetes,...

How Do You Know When HRV Training is Succeeding?

During slow-paced breathing between 4.6 to 6.5 bpm, you can examine your client's raw heart rate (HR) and respiration waveforms,...

How HRV Biofeedback Increases RSA

Respiratory sinus arrhythmia (RSA) is the speeding and slowing of the heart across each breathing cycle. RSA is the primary and entirely...