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 2: Slow-Paced Breathing

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

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,...

Low-Frequency Power and Coherence Index HRV Biofeedback Training Success

The low-frequency (LF) band (0.04-0.15 Hz) is affected by breathing from ~3-9 bpm (Task Force, 1996). The baroreflex system’s resonance...