For journalistic integrity, I also found a more negative report, and included some of its information in my article. From my title, above, you can see which way I lean.
Any Risk of Heart Attacks when Running a Marathon?
Not that those risks are equal, but people do have heart attacks under a variety of conditions.
More Promotion for my Marathon Running versus Heart Attack Article
The disclaimer is an important part of any article that gives advice that is risky, in any way, shape or form.
Various online magazine sites suggest "boilerplate" disclaimers...no doubt vetted by their lawyers.
Take note of the best disclaimers from your favourite authors or sites, and be sure to include your version whenever appropriate.
In the above DeHaan Fitness article, I said:
Disclaimer: The information contained in this article is for educational purposes only and should not be used for diagnosis or to guide treatment without the opinion of a health professional. Any reader who is concerned about his or her health should contact a doctor for advice.
I actually used two disclaimers in a fairly recent Suite 101 article, "What is Probiotic, What is Prebiotic, and Why People Should Care".
To summarize the writing tip: include a disclaimer when offering advice or opinions, and/or when someone might be tempted to "try it at home" and harm themselves.