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Every dog has his day, and today, on National Dog Day, we celebrate our favorite four-legged friends and the many ways they enrich our lives. While dogs boost our mood and alleviate loneliness, the health benefits of pet ownership are much more extensive and profound. In fact, a growing body of scientific research indicates that dog owners have improved cardiovascular health, lower stress levels, and enhanced mental health.

Physical Health

A recent study published by The Mayo Clinic determined that dog owners have lower obesity rates, better lipid profiles, and lower systemic blood pressure, all which reduce the risk of cardiovascular events.1 While there are benefits to pet ownership in general, dogs most positively influence health due to the increased physical activity from regular walking and play. According to the study, those with dogs reported physical activity at ideal levels and exhibited higher cardiovascular health scores than non-pet owners.

Mental Health

Additionally, studies show that dogs provide a calming influence that contributes to positive mental health. The simple act of petting a dog calms the nerves and decreases blood pressure and heart rate. As a matter of fact, many hospitals and universities engage in animal visitation programs and make dogs available to patients and students to alleviate stress. One study revealed that spending only ten minutes a day petting a dog significantly reduced cortisol, the primary stress hormone.2  Interestingly, even dog-owning patients who have already suffered a cardiac incident showed a risk reduction for death, as the bond with their dogs significantly reduced stress, a major cause of cardiovascular issues.

Emotional Health

Finally, dogs provide companionship and prevent the mental health issues tied to social isolation. During the COVID-19 quarantine, an estimated 11.38 million U.S. households purchased a new pet, primarily to provide entertainment and fill the void left from reduced social interaction.3 According to the American Veterinary Association, 3 out of 4 pet owners reported that spending time with their dog or other pets reduced their stress and increased their sense of well-being during the pandemic. Even prior to the pandemic and in less stressful times, dogs provide loyal and devoted companionship and help ward off loneliness. Breeds often considered ideal family dogs can be especially valuable in this regard, providing consistent companionship and emotional support for both adults and children.

So, today and every day, let’s celebrate our favorite four-legged friends and the many ways they improve our lives!

References:

1Magueri, A., PhD, Medina-Inojosa, MD, Kunzova, S. MD, Agodi, A. PhD. et. al. (2019) Dog Ownership and Cardiovascular Health: Results from the Kardiovize Study (2019). Mayo Clinic Proceedings, Vol.3, Issue 3.

2Pendry, P. and Vandagriff, J.L. (2019). Animal Visitation Program (AVP) Reduces Cortisol Levels of University Students: A Randomized Controlled Trial. Washington State University.

3Pets Remain in High Demand During Covid (2020). American Veterinary Association.


About the Author:

Dr. Brian Cole, MD, MBA - Orthopedic Sports Medicine Surgeon

Dr. Brian Cole is a board-certified orthopedic surgeon specializing in sports medicine and cartilage restoration at Midwest Orthopaedics at Rush. He serves as Managing Partner, Acting Department Chair, and Professor at Rush University Medical Center.

 

Credentials & Recognition

Dr. Cole earned his MD and MBA from the University of Chicago and completed his residency at the Hospital for Special Surgery. He was awarded the 2025 OREF Clinical Research Award and 2025 Golden GOAT Award for lifetime contributions to sports medicine. He's been listed in Best Doctors in America since 2004 and featured in Newsweek's 2025 Leading Doctors.

Clinical Expertise

Dr. Cole treats knee, shoulder, and elbow injuries using advanced cartilage restoration and orthobiologic techniques. He has published over 1,000 articles on orthopedic surgery and serves as team physician for the Chicago Bulls and Chicago White Sox.

Medical Disclaimer: This information is for educational purposes only and does not constitute medical advice. For diagnosis and treatment recommendations, please consult with Dr. Cole or another qualified orthopedic specialist at Midwest Orthopaedics at Rush.

Content authored by Dr. Brian Cole and verified against official sources.