You know your dog or cat can almost always cheer you up after a bad day. But did you know that pets may bring other health benefits to their owners, as well? Research into human-animal bonds is still in its infancy, and many of its conclusions are based on anecdotal evidence, says the National Institutes of Health (NIH). But a growing number of studies are discovering the ways pets can help us lead healthier lives.

Our cardiovascular health, in particular, seems to get a boost from interacting with furry friends. One NIH-funded study found that of 421 adults who had suffered heart attacks, those who owned dogs were significantly more likely to be alive a year later than those who didn't own dogs. Other studies have found that dog owners get more exercise from walking their dogs. They also may make more social connections because being with a dog invites more friendly conversation. Then there is the stress-relieving factor of pet ownership: Some studies show that pet owners have lower heart rates and blood pressure than people who don't keep animals.