When older couples are close together, their heart rates synchronize

As couples grow old together, their interdependence heightens. Often, they become each other's primary source of physical and emotional support. Long-term marriages have a profound impact on health and well-being, but benefits depend on relationship quality. A new study examines the dynamics of long-term relationships through spatial proximity. The researchers find that when partners are close to each other, their heart rates synchronize in complex patterns of interaction.

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