As a rule of thumb we spend a great deal of time sitting.  Harvard is telling us it is time to get up an move.  From working on a computer, watching TV to talking with friends, we spend a great deal of time sitting.     Diet, exercise, and environment hold great sway over our health.  Harvard Health Publishing provides some tools to help us stay healthy like desk exercises  and chair yoga.    Exercise helps to keep your immune system in tip top shape.  

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