A human being’s “vagal tone” keeps you healthy by regulating your critical internal systems such as your cardiovascular, glucose, and immune response. According to the March 24, 2013 New York Times, Barbara L. Fredrickson, professor of psychology at the University of North Carolina, Chapel Hill, and her research team, conducted a study showing that vagal tone is improved by your spending face-to-face time with other people. While there are lots of other opportunities for this people interaction, dancing is an ideal one.