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A woman laughing at the bottom of a flight of stairsIt’s official! A good laugh is literally heartwarming. That’s according to a study that found that watching comedy films boosts cardiac blood flow. The study also found that a watching a good tearjerker has the opposite effect, leaving hearts a little low — at least in terms of blood flow.

The study included 20 healthy young adults who watched 15 to 30 minute segments of either humorous or sad films with a minimum of 48 hours between viewings.

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The study participants were asked to refrain from aerobic exercise or from using alcohol, vitamins or herbs the evening before the viewings, since these can all affect blood flow.

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