We've all heard that expressing ourselves is good for our health. Pennebaker has the data to back it. In the months following the expressive-writing study, the volunteers who wrote their stories went to the doctor only half as often as the control group; they also used less aspirin, slept better and didn't get sick as often as before. The process boosts immune function—there are more T-helper cells to fight infections— decreases stress hormones and lowers blood pressure.
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