Our bodies have a Basic Rest and Activity Cycle, consisting of 90-120 minutes of activity followed by 20 minutes of rest. This cycle can easily be stretched or distorted, as when the individual works through the morning without taking a break, skips lunch, or works late. However, it has been found that people whose rest-activity cycle remains irregular for extended periods develop stress-related symptoms.

The rest-activity cycle involves alternate shifts in dominance from one side of the brain to another. When we move from activity to rest, the left side of the brain (associated with logic, sequence, details, analysis, calculation and language—"work mode") gives up dominance to the right side (associated with patterns, intuition, and emotion—""relaxation mode"). While we can force ourselves to remain in work mode for long periods, the right side of the brain eventually reasserts itself, leading to a loss of concentration and increased tiredness and error rates.

It's no accident that workplaces and schools traditionally built mid-morning and mid-afternoon breaks into their schedule; employers and school authorities found that people work better and think more clearly with regular breaks.

Sometimes a client will say to me "This won't work. I'll just have to add the time on to the end of the day so I'm working even longer hours!" Actually, no you won't. Just because you're at your desk, it doesn't mean you're doing productive work at a constant rate. If you're anything like me, you get far more done when you're feeling good, and far less done (with more mistakes) when you're tired.

By taking breaks in the middle of the morning and the middle of the afternoon, getting out of the workplace altogether at lunchtime, and leaving work at a reasonable time in the evening, you can improve the quality of your work and get more done in less time. So even if you aren't prepared to do it for the sake of your own health and sanity, you can take breaks with a clear conscience—"because your employer (or clients, or customers) will benefit as well!

What happens if you don't take account of the needs of your mind-body system? Typically, if the 'arousal response' to stressful situations is prolonged over weeks or months ('chronic stress'), excess amounts of stress hormones are produced and flood the system. It seems that the cells of the body begin to shut down and destroy their receptor sites for these hormones. When the receptors are below their normal levels the person will experience withdrawal—"they miss the adrenalin high and the levels of arousal and performance that go with it. They will be tempted to over-work, or use stimulants (sugar, caffeine, nicotine or other drugs) to try to regain the high.

Overachievers can become locked into a vicious circle of ever-increasing levels of activity and stress hormones—"until the mind-body system 'crashes' and develops physical symptoms. You can avoid this, and sustain health and high performance indefinitely, by being aware the needs of your mind-body system to take regular breaks.

For further reference: Ernest Rossi, The Psychobiology of Mind-Body Healing (Norton, 1994)

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Andy Smith is an emotional intelligence coach and NLP trainer based in Manchester, UK. For a wealth of additional practical tips, isit the web site at http://www.practicaleq.com, the "Practical EQ" weblog at http://www.practicaleq.typepad.com or come to one of the NW Business NLP and Emotional Intelligence Group's monthly meetings in Central Manchester (http://www.manchesternlp.co.uk).

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