Heart Rate Variability (HRV) is the variation in the time interval between successive heartbeats.¹ Contrary to intuition, a healthy heart does not beat like a metronome — it constantly adjusts its rhythm in response to breathing, stress, and environmental demands.
What It Measures
- •Parasympathetic tone — higher HRV generally indicates stronger vagal influence
- •Stress resilience — ability to recover quickly after challenge
- •Nervous system flexibility — capacity to shift between activation and recovery
- •Recovery capacity — readiness for physical and mental load
In ONDA Life
Increased HRV is a biological marker of Part 1 ("I Am") and Part 2 ("I Move") progress.² Part 1 practices activate the parasympathetic system, raising baseline HRV. Part 2 "Rhythmic Coherence" further increases HRV by synchronizing axial movements with the respiratory cycle.
References
- •Thayer & Lane, Neurosci Biobehav Rev (2009) — HRV as vagal tone marker
- •Lehrer et al., Appl Psychophysiol Biofeedback (2000) — resonance breathing and HRV