Say "I Do" to Health

I got married recently. I did it for love, certainly, but it got me thinking about the other rewards of marriagein particular, the potential health benefits. Not surprisingly, marriage, the most enduring and complicated of human relationships, can have a favorable impact on one's emotional and physical well-being. But that's not guaranteed, and it doesn't come for free.

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There's a large body of medical literature showing that married people tend to be healthier and live longer than singles. But newer research adds an important caveat: the quality of the marriage matters. Marital stress, logically enough, is...