C a 6-fold increase in the absolute incidence of exercise-related sudden cardiac death in middle-aged men compared with younger men, Thompson's1 conclusion that vigorous physical activity transiently increases the risk of acute cardiac events agrees with relative risk analysis for a triggering effect of myocardial infarction during exercise.2 3 Expressed as sudden cardiac death risk per person-hour, the reported rate of 1 per 50 000 marathon runners4 represents a 5-fold increase over the average hourly incidence per person-hour. This translates into 1 death per 200 000 person-hours of competition compared with 1 sudden cardiac death per million person-hours among middle-aged men.5
The data are finally coming in on the issue of how much exercise might be too much. The cardiovascular benefit of training for middle-aged male marathon runners may be offset by a 5-fold increase in the odds ratio for acute cardiac events during competition. At
Thank you for submitting a comment on this article. It will be reviewed by JAMA Internal Medicine editors. You will be notified when your comment has been published. Comments should not exceed 500 words of text and 10 references.
Do not submit personal medical questions or information that could identify a specific patient, questions about a particular case, or general inquiries to an author. Only content that has not been published, posted, or submitted elsewhere should be submitted. By submitting this Comment, you and any coauthors transfer copyright to the journal if your Comment is posted.
* = Required Field
Disclosure of Any Conflicts of Interest*
Indicate all relevant conflicts of interest of each author below, including all relevant financial interests, activities, and relationships within the past 3 years including, but not limited to, employment, affiliation, grants or funding, consultancies, honoraria or payment, speakers’ bureaus, stock ownership or options, expert testimony, royalties, donation of medical equipment, or patents planned, pending, or issued. If all authors have none, check "No potential conflicts or relevant financial interests" in the box below. Please also indicate any funding received in support of this work. The information will be posted with your response.
Some tools below are only available to our subscribers or users with an online account.
Download citation file:
Web of Science® Times Cited: 7
Customize your page view by dragging & repositioning the boxes below.
More Listings atJAMACareerCenter.com >
Enter your username and email address. We'll send you a link to reset your password.
Enter your username and email address. We'll send instructions on how to reset your password to the email address we have on record.
Athens and Shibboleth are access management services that provide single sign-on to protected resources. They replace the multiple user names and passwords necessary to access subscription-based content with a single user name and password that can be entered once per session. It operates independently of a user's location or IP address. If your institution uses Athens or Shibboleth authentication, please contact your site administrator to receive your user name and password.