The vagus nerve is the biggest cranial nerve originating from the brain and plays a crucial role in yoga by influencing the body's relaxation response and supporting overall well-being. It touches all major organs as it passes through the body. It is essentially the body's braking system. In yoga, the practice of deep, mindful breathing (pranayama) is one of the primary ways to stimulate the vagus nerve, activating the parasympathetic nervous system, which is responsible for the "rest and digest" state. This state helps reduce heart rate, lower blood pressure, and promote a sense of calm and relaxation. Different breathing techniques like slow, deep belly breathing, Ujjayi breath, and alternate nostril breathing (Nadi Shodhana) specifically target the vagus nerve to help calm the mind, reduce stress, and improve focus. By enhancing vagal tone—the nerve's ability to effectively regulate these calming responses—yoga practitioners can experience better emotional regulation, reduced anxiety, and improved resilience to stress. Through consistent practice, yoga helps strengthen the connection between body and mind, supporting the nervous system in maintaining balance, relaxation, and mental clarity.