Sympathetic Nervous System Response

Running on a motor?

During busy periods, some people can feel like they are “running on a motor” that is “constantly switched to on”. It can be hard to slow down, calm down, rest and reset.

The sympathetic nervous system (SNS) is responsible for the fight and flight response that initiates action in stressful and dangerous situations. The response increases heart rate, breath rate, blood flow to the muscles, alertness and it stimulates release of glucose for energy to prepare for action. It also inhibits digestion and other function that are nonessential at this time.

On the contrary, the parasympathetic nervous system (PNS) promotes rest and recovery by slowing heart rate, redirecting blood flow and conserving energy. This enables restoration of normal bodily functions, including digestion.

In periods of high and persistent stress, it can feel like the SNS is constantly activated. This heightened state of arousal can make sleep, connecting with others and complex cognitive processing more difficult. Also, when the SNS is more active, the PNS isn’t as active, which can delay digestion, in turn restricting nutrient absorption, healing and growth.

If stress persists too long, or a significant trauma is experienced, the SNS response can be reset to a heightened level, meaning it responds in a greater way to a lower level stressors. This heightened response can be exhausting and disruptive.

Most people benefit from being aware of their SNS and PNS responses. You can increase your awareness by noticing changes in your heart rate, breathing, muscle tension, sweating, fatigue and digestion. Also begin exploring what environments and circumstances trigger these responses so that you can utilise strategies such as slow breathing when exposed to these triggers. For more individualised information and approaches please be in touch.