How Much Can Watching Hockey Stress Your Heart?

October 5, 2017

Spectators experienced significantly elevated heart rates, equivalent to rates with vigorous exercise, while watching hockey games live or on TV, according to a new study in the Canadian Journal of Cardiology
Philadelphia, PA, October 5, 2017 – Sporting events often leave people on the edge of their seats, but what does all that excitement do to their hearts? A new study suggests that both the thrill of victory and the agony of defeat can have a substantial effect on the cardiovascular system. Investigators took the pulse of fans during a hockey game and found that on average, their heart rate increased by 75% when watching on TV, and by a whopping 110% (more than doubled, equivalent to the cardiac stress with vigorous exercise) when watching in person. Their findings, along with an accompanying editorial, are published in the Canadian Journal of Cardiology.
Armed with Holter monitors, a team of researchers set out to assess the effects of a Montreal Canadiens game on healthy spectators. While previous studies have indicated a link between sporting events and cardiac incidents, this is the first study to specifically focus on hockey. The average 75% increase in heart rate they found in TV viewers and the 110% bump from watching a game live are equivalent to the heart rate response that occurs with moderate and vigorous physical stress, respectively. Overall, the heart rate increased by a median of 92% (almost doubled) across all spectators.
“Our results indicate that viewing a hockey game can likewise be the source of an intense emotional stress, as manifested by marked increases in heart rate,” said senior investigator Professor Paul Khairy, MD, PhD, Montreal Heart Institute, University of Montreal. “The study raises the potential that the emotional stress-induced response of viewing a hockey game can trigger adverse cardiovascular events on a population level. Therefore, the results have important public health implications.”
While it would be easy to assume the most heart pounding moments of a game come right at the end, researchers found that peak heart rates occurred most frequently during any scoring opportunity—for or against—and during overtime. “Our analysis of elements of the hockey game associated with peak heart rates supports the notion that it is not the outcome of the game that primarily determines the intensity of the emotional stress response, but rather the excitement experienced with viewing high-stakes or high-intensity portions of the game,” explained Dr. Khairy.
Caption: Chart shows a breakdown of hockey events likely to raise heart rate.
Prior to their participation, individuals were asked to fill out a brief questionnaire, which not only assessed
their general health, but also determined their fan passion score, a method of calculating how invested a
person is in the team. Researchers adopted the fan passion score from previous studies done on soccer
fans, but found that in hockey, the score failed to predict heart rate responses.
Previous studies have shown that cardiovascular events triggered by watching sporting events are more
common in people with existing coronary artery disease, attributed to a disproportionate increase in
markers of vasoconstriction and acute inflammation in those individuals. David Waters, MD, and Stanley
Nattel, MD, authors of the accompanying editorial, point out that this research should encourage doctors
to speak to their patients about watching sports. “As outlined, watching an exciting hockey game might
trigger a CV event in an individual at risk,” they said. “The danger is particularly high in the arena and at
dramatic moments such as overtime. At-risk patients should be warned about potential CV symptoms and
should be instructed to seek medical attention promptly if symptoms develop.”
This study was designed and conducted by a pair of exceptionally motivated and curious secondary
school students at Royal West Academy (Montreal). “I sincerely congratulate Leia Khairy and Roxana
Barin for undertaking this novel and important project at such a young age,” concluded Dr. Khairy. “They
have scientifically demonstrated that it is indeed exciting to watch the Montreal Canadiens! Their research
raises public awareness about the potential role of emotional sports-related stressors in triggering cardiac
events, and opens up avenues for future research into mitigating such risks.”

Notes for Editors
The articles are “Heart Rate Response in Spectators of the Montreal Canadiens Hockey Team,” by Leia
T. Khairy; Roxana Barin; Fabrice Demonière; Christine Villemaire; Marie-Josée Billo; Jean-Claude Tardif;
Laurent Macle; and Paul Khairy, MD, PhD ( and “Editorial:
Taking Hockey to Heart: Potential Coronary Risks of Watching Exciting Games,” by David Waters, MD;
and Stanley Nattel, MD ( They will appear in the Canadian
Journal of Cardiology, volume 33, issue 12 (December 2017) published by Elsevier.
Full text of these articles is available to credentialed journalists upon request. Contact Eileen Leahy at +1
732-238-3628 or to obtain copies. Journalists wishing to schedule interviews with
the study authors should contact Lise Plante at +1 514-376-3330 ext 3898 or
To reach the authors of the editorial for comment contact David Waters at
About the Canadian Journal of Cardiology
The Canadian Journal of Cardiology is the official journal of the Canadian Cardiovascular Society. It is a
vehicle for the international dissemination of new knowledge in cardiology and cardiovascular science,
particularly serving as a major venue for the results of Canadian cardiovascular research and Society
guidelines. The journal publishes original reports of clinical and basic research relevant to cardiovascular
medicine as well as editorials, review articles, case reports, and papers on health outcomes, policy
research, ethics, medical history, and political issues affecting practice.

About the Editor-in-Chief
Editor-in-Chief Stanley Nattel, MD, is Paul-David Chair in Cardiovascular Electrophysiology and Professor
of Medicine at the University of Montreal and Director of the Electrophysiology Research Program at the
Montreal Heart Institute Research Center.

About the Canadian Cardiovascular Society
The Canadian Cardiovascular Society is the professional association for Canadian cardiovascular
physicians and scientists working to promote cardiovascular health and care through knowledge
translation, professional development, and leadership in health policy. The CCS provides programs and
services to its 1900+ members and others in the cardiovascular community, including guidelines for
cardiovascular care, the annual Canadian Cardiovascular Congress, and, with the Canadian
Cardiovascular Academy, programs for trainees. More information about the CCS and its activities can be
found at

About Elsevier
Elsevier is a global information analytics business that helps institutions and professionals progress
science, advance healthcare and improve performance for the benefit of humanity. Elsevier provides
digital solutions and tools in the areas of strategic research management, R&D performance, clinical
decision support, and professional education; including ScienceDirect, Scopus, SciVal, ClinicalKey and
Sherpath. Elsevier publishes over 2,500 digitized journals, including The Lancet and Cell, more than
35,000 e-book titles and many iconic reference works, including Gray’s Anatomy. Elsevier is part of RELX
Group, a global provider of information and analytics for professionals and business customers across

Media contact:
Eileen Leahy
+1 732-238-3628

News Release PDF