Dog lovers know how much warmth and comfort their canine
companions add to their lives. But they might not know that a growing body of
evidence suggests that having a dog may help improve heart health.
Pet ownership, especially having a dog, is probably
associated with a decreased risk of cardiovascular disease. This does not mean
that there is a clear cause and effect relationship between the two. But it
does mean that pet ownership can be a reasonable part of an overall
strategy
to lower the risk of heart disease.
Several studies have shown that dog owners have lower blood
pressure than non-owners — probably because their pets have a calming effect on
them and because dog owners tend to get more exercise. The power of touch also
appears to be an important part of this "pet effect." Several studies
show that blood pressure goes down when a person pets a dog.
There is some evidence that owning a dog is associated with
lower cholesterol and triglyceride levels. A large study focusing on this
question found that dog owners had lower cholesterol and triglyceride levels
than non-owners, and that these differences weren't explainable by diet,
smoking, or body mass index (BMI). However, the reason for these differences is
still not clear.
Dogs' calming effect on humans also appears to help people
handle stress. For example, some research suggests that people with dogs
experience less cardiovascular reactivity during times of stress. That means
that their heart rate and blood pressure go up less and return to normal more
quickly, dampening the effects of stress on the body.
If you own a dog or are thinking about it, the potential
benefits for your heart health are a nice plus. However, pets should not be
adopted for the primary purpose of reducing heart disease risk. And definitely
don't add a dog to your life if you're not ready or able to take care of one,
including making sure it gets enough exercise.
By:
Harvard Medical School.
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