How Your Mood Affects Your Health

That Mood Ring Could Save Your Life

Having an Argument

As your irritation mounts, you can feel your blood pressure rising. And that's exactly what is happening to your body when you have an argument. The effects, it seems, can be lasting. In the week after the irritating incident, you just need to think about the argument and your blood pressure will rise again, according to research published in the International Journal of Psychophysiology. So if you've recently experienced a dispute, a seething irritation or a simple frustration, you could be best off forgetting about it.

A half-hour argument with your lover can also slow your body's ability to heal by at least a day. In couples who regularly argue, that healing time is doubled again. Researchers at Ohio State University discovered this by testing married couples with a suction device that created tiny blisters on their arm. When couples were then asked to talk about an area of disagreement that provoked strong emotions, the wounds took around 40 per cent longer to heal. This response, say researchers, was caused by a surge in cytokines -- immune-molecules that trigger inflammation. Chronic high levels of these are linked to arthritis, diabetes, heart-disease and cancer.

Falling in Love

Researchers at the University of Pavia, in Italy, have found that falling in love raises levels of Nerve Growth Factor for about a year. This hormone-like substance helps to restore the nervous system and improves memory by triggering the growth of new brain cells. It is also associated with the feeling of being "loved-up" and contented, inducing a calming effect on the body and mind. Unfortunately, researchers found levels dropped after about a year -- the point at which feelings of romantic love fall away and reality kicks in.

Being Under Pressure

The effects of constant pressure -- a form of chronic stress -- are well-known. Robert Sapolsky, professor of biological sciences at Stanford University and an authority on stress, puts it like this: "In fight-or-flight, your body turns off all the long-term building and repair projects," he says. "Constant high levels of cortisol take your body's eye off the ball. Memory and accuracy are both impaired. Patrols for invaders aren't sent out, you tire more easily, you can become depressed and reproduction gets downgraded." Exposed to chronic stress for years, high blood levels of glucose and fatty acids increase the risk of cardiovascular disease and diabetes. A recent study at University College London found that stress raised cholesterol levels, another factor that increases the risk of cardiovascular disease.

Uncontrollable Laughter

Scientists at the University of California have discovered that laughter relaxes tense muscles, reduces production of stress-causing hormones, lowers blood pressure, and helps increase oxygen absorption in the blood. Cardiologists at the University of Maryland Medical Center found laughing can actually reduce the risk of heart attack by curbing unwanted stress, which can destroy the protective lining of blood vessels. A good giggle also burns calories since it's possible to move 400 muscles of the body when laughing. Some researchers estimate that laughing 100 times offers an aerobic workout equivalent to 10 minutes on a rowing machine or 15 minutes on an exercise bike.

Hiding Your Irritation

It's hard to know what's best -- venting anger or holding it in, as both have negative effects. A long-term study in Michigan looked at reactions to authority figures who yelled at subjects for something they had not done. Women who suppressed their anger in confrontations had twice the risk of dying from conditions such as heart attack, stroke or cancer. Angry outbursts last only a few minutes, but can cause massive surges in adrenaline, blood pressure and heart rate, raising the risk of heart attack or stroke by up to five times in people over 50. Subtle forms of anger, including impatience, irritability and grouchiness, damage health, too -- these states are associated with anxiety, low mood and a higher infection risk due to depressed immunity.