Breathing Exercises to Increase HRV and Calm the Nervous System | Inhale 4.4 sec, Exhale 6.6 sec �Try this simple breathing exercise to boost your heart rate variability (HRV), calm your nervous system, and restore balance. By gently slowing your breath and extending your exhale, you encourage relaxation and resilience. 💜 �This pattern uses a smooth inhale for about 4 seconds and a longer exhale for about 7 seconds, a rhythm shown to support higher HRV and a calmer state of mind. Step-by-Step I