LF band power assesses the success of HRVB while your client breathes from 4.5-7.5 bpm. However, when breathing from 12-18 bpm during resting baselines, you should not expect increased LF power unless the vagal brake is stuck. Instead, use HF power during post-training baselines to confirm HRVB training success. The natural log of HF power is a surrogate for vagal tone. This Real Genius episode draws heavily on Dr. Don Moss' clinical experience, extensive writing, and HRV presentations. It was illustrated by Dani S@unclebelang and written by Fred Shaffer and Zachary Meehan.
Note. HF amplitude (blue) is greatest in the post-training baseline power spectral display. In contrast, LF amplitude (green) is much lower since the client breathed normally.
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BCIA Clinical Update Series, Add Slow-Paced Contraction to Heart Rate Variability Biofeedback, January 26, 2024, 11am Pacific, Noon Mountain, 1pm Central, 2pm Eastern. Presented by Fred Shaffer PhD, BCB, BCB-HRV. Matt Bennett, Optimal HRV Co-Founder, recently interviewed me about HRV time-domain measurements. This podcast is available at https://youtu.be/bWQ1EBfOvHU?si=FEqdqbcemATLWkjC or wherever you listen to your podcasts.Â
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