If it wasn't already clear through common sense, it's become painfully clear through science that sitting all day is terrible for your health. What's especially alarming about this evidence is that extra physical activity doesn't seem to offset the costs of what researchers call "prolonged sedentary time." Just as jogging and tomato juice don't make up for a night of smoking and drinking, a little evening exercise doesn't erase the physical damage done by a full work day at your desk.
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