Cardiac Coherence Exercise: 6 Essential Recommendations Based on New Discoveries in Neuroscience

Cardiac coherence is a slow, rhythmic breathing technique that helps synchronize the heart, the brain, and the autonomic nervous system. In practice, this means learning to breathe at a specific rhythm to stimulate the vagus nerve—the "highway of calm" that connects our brain to our internal organs.

Numerous scientific studies now confirm that this method has tangible and measurable effects on stress reduction, anxiety management, sleep quality, and even cognitive function. But to reap the maximum benefits, you still need to practice it correctly—which is what neoflo calls the vagus nerve deep breathing.

Here are 6 recommendations based on the latest neuroscience research for deeply activating the vagus nerve through cardiac coherence.

2. Do long workouts (> 15 minutes): the vagus nerve deep breathing

Researchers observed a dose-dependent effect: the longer the session, the longer the effects on the autonomic nervous system (You et al., 2021). After 15 to 20 minutes of slow breathing, spontaneous breathing slows on its own from 16–17 to 11–12 breaths per minute—a sign of prolonged vagus nerve activation that persists even outside the session.

It is this 20-minute session that we call the vagus nerve deep breathing : the scientifically standardized version, as opposed to the 5-minute sessions popularized by the 365 method, which produce only a transient acute effect.

🧬 Source: You M. et al. (2021). “ Single Slow-Paced Breathing Session at Six Cycles per Minute.” IJERPH.

4. Practice every day for at least 4 to 8 weeks.

Clinical trials have shown that practicing cardiac coherence daily for 1 to 2 months leads to lasting changes in the brain: the prefrontal cortex (the seat of calm and reasoning) becomes more connected to the amygdala (the center of fear), thanks to the neuroplasticity induced by breathing. It is this remodeling that transforms underlyinganxiety and builds long-term resilience to stress.

🔁 Source: Cho C. et al. (2023). “Changes in the Medial Prefrontal Cortex Mediate the Effects of Heart Rate Variability Biofeedback on Positive Emotional Memory Biases.”

5. Practice in the evening for better sleep

Cardiac coherence sessions just before bedtime improve sleep quality and physiological recovery. A study (Laborde et al., 2019) showed that this practice enhances nocturnal vagal activity and promotes faster and deeper sleep onset. To learn more, check out our article on cardiac coherence for sleep.

🌙 Source: Laborde S. et al. (2019). “ Slow-Paced Breathing and Sleep Quality.” J Clin Med.

neoflo : the belt that incorporates all of these recommendations

neoflo 's breathing belt is the world's first device that guides your breathing through touch, using patented haptic technology. It guides you through a daily 20-minute practice at the optimal rhythm (4-6), using nasal and abdominal breathing—incorporating all six of the scientific recommendations listed above in a single tool.

👉 By using it in the evening, whether lying down or sitting up, you naturally stimulate your vagus nerve without having to count or stare at a screen. Invented by a biomedical engineer and co-developed with Dr. Thomas Cantaloup, a physician specializing in sleep and mental health.

🎖️ Bronze medal at the 2024 Lépine Competition — neoflo transforms the science of breathing into an accessible daily ritual.

Conclusion

Cardiac coherence is more than just a relaxation exercise: it’s a powerful neurophysiological tool. But to reap its full benefits, you need to practice for a long time, regularly, and under the right conditions. That’s exactly what the vagus nerve deep breathingneoflo makes possible every day.