Every thought releases some type of chemical. When positive thoughts are generated, at times we’re feeling happy or optimistic, cortisol decreases and the brain produces serotonin, creating a feeling of well-being. This puts our bodies into the parasympathetic part of our autonomic nervous system, which relaxes our muscles, lowers our heart rate, improves sleep, optimises digestion, relaxes muscles and creates a feeling of calm.
However repeated negative thoughts, such as worry, anger, resentment, fear, or depression, may cause our bodies to release the stress hormones cortisol and adrenaline. This can trigger the sympathetic side of the automatic nervous system, it’s known as fight or flight and it readies us for danger, gives us extra strength and speed to keep us safe. But the down side is that it puts strain on the body by pausing it’s other activities, this can cause insomnia, poor digestion, muscle tension, low immunity, elevated heart rate and anxiety.
So we know that thoughts and feelings effect the body, what many people don’t consider is that the exchange goes both ways.
Exercises is known to produce endorphins, decrease overall levels of tension, elevate and stabilise mood, improve sleep, and build self-esteem. Various studies have noted the importance of posture in affecting one’s personally and relationships to people and the world. A straight backed open posture that takes up space can boost confidence and increases social interactions, whilst a slouched, contained and closed off posture can isolate and contribute to depression and low self esteem.
Working on the physical symptoms of stress and anxiety and understanding how to shift your nervous system out of fight and flight mode can significantly improve not only your physical but also your mental health.