By Dr. Pamela Fernandes  |  14 February 2025   

In June 2021, the world watched in horror as Danish footballer Christian Eriksen suffered a sudden cardiac arrest during a Euro 2020 match. This shocking incident highlighted the importance of recognizing cardiac emergencies in sports, including martial arts, where athletes push their bodies to the limit. Sudden cardiac arrests during sports are a significant concern and should not be taken lightly.

Understanding Sudden Cardiac Arrests

Sudden Cardiac Arrest (SCA) in athletes is defined as a sudden collapse due to any cardiac cause. In martial arts, there are multiple videos made public by consent to heighten awareness about sudden cardiac arrests. These incidents can occur not only during strenuous activity but also at rest.

When Eriksen collapsed, there were numerous questions. Had there been something they had missed? Did his previous physicals catch nothing? In most sudden cardiac arrests, there’s no identifiable cause. In fact, in athletes who have a sustained amount of exertion daily, the heart remodels itself structurally and functionally, so any changes on an ECG might not warrant further investigation.

The late Kirkland Laing, a British boxer, suffered from health issues related to heart conditions. His story serves as a reminder of the importance of heart health in combat sports, encouraging fighters to prioritize their cardiovascular well-being.

Causes of Sudden Cardiac Arrests

Here are a few causes of sudden cardiac arrests in decreasing order of prevalence based on scientific studies, including those by Maron et al. (2013)::

In athletes BELOW the age of 35:
  • Primary electrical disease (no specific cause identified)
  • Idiopathic left ventricular hypertrophy
  • Anomalous origin of the coronary arteries
  • Heritable cardiomyopathies
  • Myocarditis
  • Electrical disorders
In athletes ABOVE the age of 35:
  • Coronary artery disease
    Idiopathic left ventricular hypertrophy
    Heritable cardiomyopathies
    Primary electrical disease
    Myocarditis

Can We Pre-Screen for Cardiac Arrests?

To some degree, yes, we can. During a physical exam, a simple history of severe dizziness or fainting, unexpected shortness of breath, or chest pain during or immediately after exercise should be inquired. The presence of any first-degree relatives who died suddenly or had severe cardiac disease under age 60 must also warrant further investigation.

Food in Heart Shape Bowls 1024

Any physical examination should also measure and compare blood pressure in both arms, check for heart murmurs, and examine physical features for Marfan syndrome. A 12-lead ECG can be done, but it is not sensitive enough to detect all electrical diseases or premature coronary disease.

Athletes often have echocardiography and stress tests to evaluate heart function. However, studies have shown that 6 out of 8 sudden cardiac deaths occurred in athletes who had a negative screen on history, physical examination, ECG, echocardiography, and were fit and healthy for sports.

So, while these tests and physical examinations might not pre-screen all cardiac conditions, they will catch most of them. Supervised and graded exercise training can significantly reduce the risk of coronary events. In fact, regular exercise decreases the risk of both myocardial infarction and sudden cardiac arrests.

Unfortunately, despite the best and most frequent screening programs and exercise programs, the rare occurrence of sudden cardiac arrests during athletic events is a reality.

Signs and Symptoms of Cardiac Issues

Martial artists and athletes should be aware of the following signs and symptoms that could indicate potential cardiac issues:

  • Chest pain or discomfort: Any unusual pressure or tightness in the chest should not be ignored.
  • Unusual shortness of breath: Difficulty breathing during or after training can be a red flag.
  • Dizziness or fainting: Feeling lightheaded or losing consciousness, especially during exertion, requires immediate attention.
  • Fatigue that is disproportionate to the activity: If fatigue sets in unusually early, it may indicate underlying issues.

Heart Health Tips for Fighters

To maintain optimal heart health, fighters and martial artists can follow these guidelines:

  • Nutrition: A balanced diet rich in fruits, vegetables, lean proteins, and whole grains can support cardiovascular health. Famous fighters like Georges St-Pierre emphasize the importance of diet in training, stating that nutrition is a critical component of an athlete’s performance. Research shows that nutrient-dense diets contribute to better heart health, as noted in studies like Mozaffarian and Wu (2011) on the cardiovascular benefits of fish consumption.
  • Hydration: Staying hydrated is crucial, especially during intense training sessions. Notable coaches such as Freddie Roach advocate for proper hydration practices for their athletes. Kreider et al. (2010) emphasize the importance of hydration for performance and cardiovascular function.
  • Regular Health Check-Ups: Regular screenings can help identify potential issues before they become serious. Coaches like Freddie Roach often stress the need for routine health evaluations for their boxers. Maron and Maron (2013) highlight the importance of these evaluations in preventing sudden cardiac events in athletes.

Sudden Cardiac Arrests in the Dojo

All athletes must know the risk of sudden cardiac arrest while performing strenuous activity. Evidence reveals that survival rates are excellent after an arrest when appropriate resuscitation is promptly initiated. This is especially true if it is a witnessed arrest and there’s a defibrillator (AED) on-site.

Here are a few essential steps to prevent sudden cardiac arrests at the dojo. Needless to say, if a Cardiac event happens in the dojo call 911 immediately:

  • Train all members to be vigilant. Everyone should be able to identify a cardiac arrest.
  • CPR training for all members.
  • Keep an AED on-site or know where the AED is located within the building.
  • Designate trained members to operate the AED during every shift.
  • Start CPR immediately upon witnessing a cardiac arrest.
  • Post Cardiac Arrest Protocols and Flowcharts on the wall for easy reference.
  • Encourage all members to participate in screenings.
  • Organize free screenings at martial arts conferences to raise awareness.
  • Instruct athletes not to push themselves beyond their limits.
  • Regularly practice CPR drills so that skills remain fresh among designated members. 

Final Thoughts

Sudden cardiac arrest is a serious issue that affects athletes across various sports, including martial arts. By raising awareness, implementing preventive measures, and ensuring proper training and equipment are available, we can significantly reduce the risk of SCA incidents in the dojo. Remember, a proactive approach can save lives, and understanding the importance of heart health is crucial for every athlete.

People Also Ask

Frequently Asked Questions

What should I do if I see someone collapse?

Immediately call emergency services and start CPR if you are trained. If an AED is available, retrieve it and follow the instructions.

How can I become CPR certified?

Many organizations offer CPR certification courses, including the American Heart Association and the Red Cross. Check local community centers, gyms, or hospitals for available classes.

What are the legal requirements for having an AED on-site at a dojo?

Regulations vary by location, but many states recommend or mandate that facilities with a certain number of people on-site have an AED available. Check local laws and guidelines to ensure compliance.

Don’t Break My Heart

The heart is a pump that works continuously and tirelessly, as long as you’re alive. Sometimes, the electrical system that keeps it functioning can malfunction. Other times, the vessels may become clogged with fat from unhealthy diets, the muscle can become fatigued or overworked, or constant stress can lead to inflammation in the blood vessels.

There are numerous reasons for the heart to fail, and some of those reasons are preventable. Don’t break your heart; prioritize your health by ensuring adequate sleep, resting, exercising regularly, managing stress, eating a balanced diet, and getting your annual screenings.

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About the author

Post - How We're Training

Dr. Pamela Q. Fernandes is an author, doctor and medical writer. Born and raised in Kuwait, she graduated from Angeles University College of Medicine, Philippines in 2007. Soon after that, she started her career as a medical writer and physician. Pamela is an advocate of preventive health, rural medicine, women’s health and tele-medicine having been active in these roles for the majority of her decade long career in medicine. She an Aikido practitioner. Learn more about her at pamelaqfernandes.com.

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