Your physiology is in a feedback loop with your emotions. For
example, if you are depressed, your body will consistently slump and slouch, which will
influence your body to become more depressed. Feedback loops get more intense if not
interrupted so, over time, that feedback loop may eventually result in a physical illness.
(And that, in turn, gives you another excuse to be depressed, etc.) Conversely, if you are
in great physical condition, it's easier to have a positive outlook. By Geoffrey James ,
BNET, November 2007.
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