Last week we had a look at some of the benefits of a regular Bikram practice, and even though it may have been narrowed down to 10 for the purpose of the article I think it was pretty clear the list could easily have been twice as long. This week I started thinking about how amazing it is that ailments as diverse and complex as depression, arthritis, and diabetes, can all be relieved through yoga. But it also got me wondering at just how?! this healing happens. In fact the answer is pretty simple; yoga works by regulating the nervous system, more precisely, the vagus nerve, and the healthy operation of the vagus nerve has everything to do with our body's ability to successfully respond to stress.
The vagus nerve is kind of a big deal. It is the largest cranial nerve starting at the base of the skull, wandering down to the colon, and influencing the respiratory, digestive and nervous systems en route. It helps to regulate all of our major bodily functions; our breathing, heart rate, and digestion, as well as our ability to take in, process, and make sense of our experiences are all directly linked to the vagus nerve. It is responsible for the activation of our parasympathetic nervous system, the mechanism which controls our relaxation responses and our moods. In short; the vagus nerve has a pretty long to-do list!
Now, when the vagus nerve is functioning well and vagal tone is high (which is what we want!), the parasympathetic nervous system is activated and the body can go from active, busy states to more relaxed ones pretty easily. The problems arise when the body is stressed, anxious or in a constant state of fight or flight. When this happens the parasympathetic nervous system which controls our relaxation responses is deactivated and the sympathetic nervous system goes into survival overdrive, the heart rate rises, breathing becomes shallow, and our moods are hard to manage. This is when we really need to wake up the parasymathetic nervous system, and start stimulating the nagus nerve and this is where yoga comes in!
Pranayama! Slow, deep breathing, diaphragmatic breathing, stimulates the vagus nerve. Breath retention followed by slow exhalation is one of the best methods of vagal stimulation. And what is more, yogic breathing momentarily suppresses stress hormones. And how do we start our Bikram class? With 2 sets of 10 deep pranayama breaths, holding air in the lungs on the 6th count of the inhale and slowly exhaling for 6 counts. Perfect! When we come back to our breath again and again throughout our yoga class we are directly stimulating our nagus nerve encouraging high vagal tone (good!) and ensuring that our parasympathetic nervous system prevails. We are actively encouraging our bodies to evacuate stress through our breathing, and as such we come out of the studio in a fantastic mood and feeling incredibly relaxed, which means we all want to go back for more!
And why wouldn't you?! A yoga practice that reduces stress, lifts your mood, and keeps your circulatory, respiratory, and digestive systems healthy sounds pretty good to me!
See you on your mats! :-)


















