Milton's Satan knew whereof he spoke. We're starting to get it too. Chewing over stressful situations is itself stressful.
Which has the greatest effect on your heart's health: arguing with a spouse or running a marathon? Arguing could have closer links to later heart disease, but for an unusual reason. Just thinking about the fight appears to lead to high blood pressure and later health problems, according to a UC Irvine-led study.
Both tasks raise blood pressure and cause some stress on the body, but arguments have an emotional side that creates longer recovery times in the body than non-emotional -- yet stressful -- events like running. The study appears in the Sept./Oct. issue of Psychosomatic Medicine.