The Latest and Strongest Autonomic Nervous System Tuning Program Integrating Heart Rate Variability (HRV) Biofeedback and 'Gum Chewing'

In recent years, with the spread of smartwatches like Apple Watch and Garmin, the indicator “HRV (Heart Rate Variability)” has garnered attention at the forefront of health management. HRV measures the minute fluctuations in the intervals between heartbeats. A higher value is an extremely accurate barometer of the autonomic nervous system, indicating that “the switch between the parasympathetic nervous system (relaxation) and the sympathetic nervous system (accelerator) is smooth, and stress resilience is high.”

Deep breathing (breathing techniques) is famous as a training method (biofeedback) to intentionally keep this HRV high. However, by combining this with “rhythmical chewing (chewing gum),” a hybrid intervention program that explosively increases stress tolerance becomes possible.

The Strongest Enemy That Lowers HRV: Chronic Psychological Stress

Psychological stress, such as work pressure, anger, and impatience, fixes the sympathetic nervous system in a chronically “on” state. In this condition, the heart continues to beat monotonously at regular intervals, and HRV (fluctuation) drops drastically (pathways leading to hypertonia of the sympathetic nervous system and collapse of autonomic balance in E08 and E09).

Leaving a lowered HRV state untreated will reduce sleep quality, lower immune function, and ultimately lead directly to physical dysfunctions such as cardiovascular disease and ED (erectile dysfunction). To loosen this “stiffness of the autonomic nervous system,” it is necessary to consciously stimulate the parasympathetic nervous system (vagus nerve) and flip the switch to put the brakes on the heart.

Double Hacking Through “Breathing” and “Chewing (Trigeminal Nerve)”

Normally, we cannot control our autonomic nervous system with our willpower (just as we cannot consciously stop our heart). However, the human body has “a few backdoors” to access the autonomic nerves. These are “breathing” and “chewing.”

1. “Breathing” to Awaken the Vagus Nerve: Breathing slowly (especially making the “exhalation” time longer) stimulates the vagus nerve, the main cable of the parasympathetic nervous system to the heart, immediately raising HRV (a technique sometimes called resonance breathing).
2. “Chewing” to Calm the Brain’s Center: The movement of chewing gum at a constant tempo sends signals to the brainstem through the powerful trigeminal nerve spreading across the face. This promotes the secretion of serotonin (the security hormone) while applying a physical brake to the excessively excited hypothalamus (stress center) (awakening control effect related to E11).

The HRV x Chewing Biofeedback Practical Protocol

By opening these two backdoors simultaneously, the following program dramatically restores the tone of the autonomic nervous system in a very short time (about 5 to 10 minutes). By using the functions of a smartwatch (heart rate or stress measurement, breathing apps) in combination, you can confirm the effect by “quantifying it (getting feedback).”

• STEP 1: Check the Baseline: When feeling stressed or between tasks, check your current “heart rate” or “stress score (HRV-based)” on your smartwatch.
• STEP 2: Chewing Setup: Put sugarless hard gum in your mouth. Initially, start chewing rhythmically at a slightly faster tempo (1 to 2 times a second), switching the brain’s fog (distracting thoughts) to focus on the “rhythm of chewing.”
• STEP 3: Synchronization with Breathing: Gradually lower the rhythm of chewing gum to a “slow, constant tempo.” In time with this, begin conscious abdominal breathing.
  • Inhale deeply through the nose over 4 seconds.
  • Exhale slowly through the mouth over 6 seconds (longer than the inhalation).
  • Continue to chew gum in a constant rhythm during this relaxed cycle of “inhale and exhale.”
• STEP 4: Check Feedback: After continuing this “chewing + deep breathing” for 5 minutes, check your heart rate and stress score again on your smartwatch. If your heart rate has dropped and your relaxation score has risen (HRV recovery), the tuning of your autonomic nervous system is a success.

In today’s harsh information stress society, our autonomic nervous system is constantly maxed out in the red zone. By combining the objective grasping of numerical values (HRV) using smart devices with the primitive yet strongest physical device of “your own facial muscles (chewing),” it is possible to intentionally design the ultimate mental condition.