Stress Management: The only introduction you’ll ever need. Vera Peiffer

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      The effects of the sympathetic nervous system can be very beneficial, provided they do not come into play too often or too excessively. A slight increase in body tension, together with higher energy levels and the associated faster reaction time, is of great value if you have to perform well; it is when these reactions become excessive that problems result and we are less likely to cope well.

      When the sympathetic nervous system is stimulated repeatedly and over a long period of time, your body may be able to adapt for a while, but as soon as any additional demands are made on it – such as those brought about by an unhealthy diet, smoking, drinking or lack of sleep – your system gets overloaded and can break down. Being in physical overdrive can become a habit, and if there is never a chance for the parasympathetic nervous system to kick into gear and reverse the process, you wear down your inner organs. This is analogous to driving your car at high speed in a low gear all the time – eventually you have problems with the engine.