Did You Know These Potential Adverse Cardiovascular Effects From Excessive Endurance Exercise?

Please follow us on Telegram to be sure to receive our latest posts!

Did You Know These Potential Adverse Cardiovascular Effects From Excessive Endurance Exercise?
Graphic – herbs-info.com Image sources – see foot of article

Cardio is generally beneficial for health, but it could become harmful to your heart when taken to excessive lengths. This generalization was posited by a 2012 study [1] published in the journal Mayo Clinic Proceedings that warned of the long-term harm posed to the cardiovascular system by excessive endurance exercise such as marathon, ultramarathon, ironman distance triathlons and very long distance bicycle races. These activities may cause structural changes to the heart and enlarge arteries, says the study.

According to lead author Dr. James O’Keefe, regular daily exercise is effective for the prevention and treatment of diseases such as obesity, hypertension, heart failure, and coronary heart disease. However, extreme endurance training can cause musculoskeletal trauma and cardiovascular stress. The study associates ultramarathon running and professional cycling with five-fold increase in the prevalence of abnormal heart rhythms.

In an interview with the magazine “Runner’s World”, Dr. O’Keefe clarified that a single marathon is not necessarily bad for a person. He noted that what is bad for one’s health is to do 10 or 15 marathons a year for 20 years. [2]

O’Keefe compared the benefits of exercise to a powerful drug. He explained that any potent drug has an ideal dose. This dosage should be enough to bring full benefit. Too much of it can cause dangerous side effects. He applied the same analogy in the benefits of exercise. He said that when people do more than an hour of strenuous exercise, they could lose some of the health benefits seen with lesser amounts of physical activity. The study author suggested to getting into exercise patterns that promote overall health and longevity.

The Mayo Clinic doctor stressed the importance of just thirty minutes of moderate or vigorous physical activity. He mentioned the influence of a daily exercise habit on cutting one’s risk for premature death, diabetes, Alzheimer’s disease, depression, and heart attack. He added that people who exercise regularly have lower rates of disability [4] and longer average life expectancy than sedentary people. [5]

O’Keefe’s findings are supported by other studies. One was presented at the Canadian Cardiovascular Congress in Montreal, Quebec in 2001 that showed the impact of long-distanced running on cardiac risk. [3] First published in The American Journal of Cardiology, the study linked long-distance running to high levels of inflammation that may trigger cardiac events.

Another study published in the Journal of Physiology in 1985 even discovered grimmer news about excessive endurance exercise. [4] The study focused on extremely fit older men who had successfully run in a minimum of one hundred marathons. It hypothesized that marathon running could provide a cardiovascular benefit to this group of men. Well, Wilson M et. al. discovered that half of these marathoners showed some heart muscle scarring, especially the ones who had trained the longest and hardest.

Heart scarring was also the health issue developed by male rats which were subjected to intensive exercise training to mimic the strenuous daily exercise load of serious marathoners. [6] Before the study was conducted, all the rats had normal, healthy hearts. The study documented diffuse scarring and some structural changes in the cardiovascular system after long-term intensive exercise training.

O’Keefe et. al. and other studies are an important reminder that the human heart does not regenerate itself and that humans only have one heart. While skeptics can continue to emphasize the fact that these studies are small and non-randomized, more evidence for the relation between extreme exercise and the subsequent adverse structural remodeling of the heart is mounting – and should not be ignored.


[1] O’Keefe JH et. al. (2012). Potential Adverse Cardiovascular Effects From Excessive Endurance Exercise. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3538475/

[2] Amby Burfoot. (2012). Q&A with the “Potential Adverse Effects” of Endurance Exercise Authors

[3] Siegel AJ et. al. (2001). Effect of marathon running on inflammatory and hemostatic marker

[4] Stanley P. Brown, Wayne C. Miller, Jane M. Eason. (2006). Exercise Physiology: Basis of Human Movement in Health and Disease https://books.google.com.ph/books?id=T-s3OAZdlhsC&pg=PA392

[5] Georg Neumann, Arndt Pf¸tzner, Anneliese Berbalk. (2000). Successful Endurance Training. https://books.google.com.ph/books?id=4CVi3iZlAk4C&pg=PA28

[6] Wilson M et. al. (1985). Diverse patterns of myocardial fibrosis in lifelong, veteran endurance athletes https://www.ncbi.nlm.nih.gov/pubmed/21330616

[7] Begoa B et. al. (2011). Cardiac Arrhythmogenic Remodeling in a Rat Model of Long-Term Intensive Exercise Training https://circ.ahajournals.org/content/123/1/13.short

Photo credits:

Pixabay (PD)

😳 What Tinnitus Does To Your Brain Cells (And How To Stop It)

After 47 years of studies and countless brain scans done on more than 2,400 tinnitus patients, scientists at the MIT Institute found that in a shocking 96% of cases, tinnitus was actually shrinking their brain cells.

As it turns out, tinnitus and brain health are strongly linked.

Even more interesting: The reason why top army officials are not deaf after decades of hearing machine guns, bombs going off and helicopter noises…

Is because they are using something called "the wire method", a simple protocol inspired by a classified surgery on deaf people from the 1950s...

★ How To Get Rid Of Nail Fungus:

★ Does Your Salad Contain This Vegetable?

★ 20 Natural Painkillers In Your Kitchen (Video):

Herbs Health Happiness Youtube

★ Men's Prostate Health:

enlarged prostate solution

The #1 Muscle That Eliminates Joint And Back Pain, Anxiety And Looking Fat

By Mike Westerdal CPT

Can you guess which muscle in your body is the #1 muscle that eliminates joint and back pain, anxiety and looking fat?

This is especially important if you spend a significant amount of time sitting every day (I do, and this really affects me in a big way!)

Working this "hidden survival muscle" that most people are simply not training because no-one ever taught them how will boost your body shape, energy levels, immune system, sexual function, strength and athletic performance when unlocked.

If this "hidden" most powerful primal muscle is healthy, we are healthy.


Is it...

a) Abs

b) Chest

c) Glutes

d) Hip Flexors

Take the quiz above and see if you got the correct answer!

P.S. Make sure you check out this page to get to know the 10 simple moves that will bring vitality back into your life:

==> Click here to discover which "hidden survival muscle" will help you boost your energy levels, immune system, sexual function, strength and athletic performance permanently!

Join Our Email List:

4 worst alcohols

If you enjoyed this page: