We know when a plant needs water - we see it wilt. We are not good at recognising when we ourselves are wilting and most of us are, most of the time. We do not drink enough water. We need at least 8 glasses of water a day. Tea and coffee are no substitutes. They are diuretics, pulling water out of our cells.

Our bodies are not good at telling us when we are thirsty. Too often we interpret the signals as hunger. Try drinking a glass of water instead of reaching for a snack bar.

Water is fundamental to our cells' well-being. A fat cell, plumped up with water works highly efficiently. Deprived of water, our brain cells function less well and our thinking processes slow. Yet we sit at our computers wilting and struggling to concentrate.

Take every opportunity to drink water at work. Have ample water at every meeting. Faced with a difficult task, in addition to taking deep breaths, take a long drink of water and feel the difference in energy.

Getting up from the desk and going to the water cooler also gets muscles working and the lymph system moving - good for clearing toxins from brain cells. Try skipping to the water cooler and see what that does to energy levels!

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Take every opportunity to drink water at work