07/02/2009 05:12 am ET Updated Nov 17, 2011

STUDY: Laughter Can Relieve Stress, Lower Blood Pressure

Laughter is not only an effective stress-reliever, but can be heart-healthy, according to research presented at the American College of Sports Medicine's 56th Annual Meeting in Seattle. Two separate studies examined the role of a good laugh as it relates to health.

One of the studies took an inverted approach to previous research on the harmful cardiovascular tolls of stress and negative mood. A small group of healthy adults were instructed to watch either a comedy or documentary film, and were monitored for carotid artery activity during the films.

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