Cardiac Safety and AEDs at Football Fields

By 4Football Staff · October 5, 2026 · 10 min read

Sudden cardiac arrest is rare in football but survivable when someone starts CPR and uses an AED within minutes. Here is what to know about causes, warning signs, equipment and planning.

A teenager jogging back to the huddle at practice suddenly drops to the grass. He does not break his fall, he does not respond when a teammate shouts his name, and his breathing sounds odd. For a moment everyone assumes he has been knocked out or is joking. In that moment, the clock has started on one of the few emergencies where the first few minutes decide almost everything.

Sudden cardiac arrest is uncommon in football, and most players, coaches and parents will never see one. But it is one of the medical emergencies for which a team can prepare in a very concrete way, with a written plan, a trained group of responders and a device called an automated external defibrillator, or AED. Programs that do this well give a collapsed player a real chance. Programs that do not can lose precious minutes.

This article is general education about cardiac safety. It does not replace training. The best next step after reading is to take a hands-on CPR and AED course from the American Heart Association, the American Red Cross or another recognized provider.

Cardiac arrest is not the same as a heart attack

The two terms are often confused, and the difference matters for how people respond.

In young athletes, the cause of sudden cardiac arrest is usually an electrical problem or a structural heart condition, not a blocked artery. During cardiac arrest the heart is often in an abnormal rhythm called ventricular fibrillation, in which the muscle quivers without pumping blood. Only a shock from a defibrillator can restore a normal rhythm, and CPR keeps blood moving to the brain and heart until the shock is delivered.

Why it happens in young athletes

Doctors identify several categories of causes:

• Inherited or structural heart conditions. These include hypertrophic cardiomyopathy, a thickening of the heart muscle, and certain abnormalities in the arteries that supply the heart. Some people are born with them and have no symptoms until the day they collapse.
• Electrical conditions. Some rhythm disorders, including long QT syndrome and similar conditions, can trigger dangerous rhythms during exertion.
• Inflammation of the heart muscle. Myocarditis can follow certain infections and can make exercise dangerous while it is active.
• Commotio cordis. A blow to the chest at a precise moment in the heartbeat cycle can trigger ventricular fibrillation in a healthy heart. It is most often described in sports with hard projectiles, such as baseball and hockey, and it has been documented in football and other contact sports. The treatment is the same: immediate CPR and an AED.

None of these causes can be diagnosed by watching an athlete play. That is why every player should get a pre-participation physical, and why teams need to be prepared even when no player has a known problem.

Other medical emergencies can also cause a collapse on a football field, such as exertional heat stroke, a severe asthma attack, a head or neck injury, or a collapse in a player with sickle cell trait. These require different responses, so a person who has fallen should be assessed quickly by trained staff. Our article on heat illness prevention and response explains the heat emergency, which requires rapid cooling.

Warning signs that deserve a doctor visit

Some young people have warning signs before an event. These do not always mean something is wrong, but they should never be ignored:

1. Fainting or nearly fainting during or right after exercise
2. Chest pain or pressure with exertion
3. Unusual shortness of breath or fatigue compared with teammates
4. A racing or irregular heartbeat or palpitations
5. Dizziness during exercise
6. A family history of sudden unexplained death, cardiomyopathy or inherited rhythm conditions, especially in a relative who died before middle age

A player who reports any of these should see a doctor before returning to hard exercise. The pre-participation physical evaluation, usually required before the season, includes questions about these symptoms and family history. Whether to add an electrocardiogram to routine screening is debated among medical groups, so parents can ask their pediatrician or sports medicine physician which approach fits their child.

Recognizing cardiac arrest on the field

The signs are:

• A sudden collapse, sometimes without warning
• No response when the person is tapped and called
• No breathing, or only gasping, which is not normal breathing and can occur in the first minutes of cardiac arrest
• Possibly brief seizure-like movements

If a player collapses and does not respond, treat it as a cardiac arrest until proven otherwise. A pulse check by an untrained person is unreliable, so rescuers should not delay CPR to look for a pulse. If the person is breathing normally and responding, it is not cardiac arrest, and the team's other emergency procedures apply.

Do not assume the player is faking or merely stunned. Starting CPR on someone who turns out not to need it is far less harmful than waiting.

The chain of survival

Emergency medicine describes the response to cardiac arrest as a chain of links. For a football field, a simplified version is:

1. Recognize the emergency and call for help. Someone calls 911, and someone is sent for the AED.
2. Start CPR immediately. Chest compressions keep blood flowing.
3. Use an AED as soon as it arrives. Early defibrillation is the most important factor in survival.
4. Continue until EMS arrives and takes over. Advanced care and transport follow.
5. Recovery and follow-up. The athlete receives hospital care.

A widely cited estimate from the American Heart Association is that the chance of survival falls by roughly 7 to 10 percent for every minute that passes without defibrillation. Sports medicine groups therefore set an ambitious goal: that a shock be delivered within about three minutes of collapse. This is why a fast response from the people already at the field matters more than the arrival time of an ambulance.

CPR basics

CPR training is best learned hands-on, but the principles are simple.

1. Check the scene and the person. Tap and shout.
2. Call 911 or have someone else call, and send another person for the AED.
3. Look for normal breathing, for no more than about ten seconds.
4. Begin chest compressions. Place the heel of one hand on the center of the chest, put the other hand on top, and push hard and fast. For adults and teenagers, compress at least 2 inches (about 5 centimeters), at a rate of 100 to 120 per minute, and let the chest rise fully between compressions.
5. Do not stop except when the AED says to. Interruptions reduce blood flow.
6. Rotate rescuers if possible. Compressions are tiring, and quality drops after a couple of minutes.

Untrained bystanders are advised to use hands-only CPR, which means compressions without breaths. Trained rescuers may add rescue breaths in a ratio that their course teaches, commonly 30 compressions to 2 breaths. For younger children, courses teach slightly different techniques. If you coach youth players, take a course that covers children.

Football equipment and CPR

Football equipment adds a challenge. A player in a helmet and shoulder pads cannot receive effective CPR or an AED until the chest is accessible. Sports medicine organizations that have studied this recommend that responders be trained and practiced in the following:

• Remove or open the facemask quickly. Trained staff use a tool made for cutting or releasing the facemask attachments, and the tool should be kept at the field.
• Leave the helmet in place unless it prevents care. The helmet and pads together keep the head and neck in a neutral position if there is a spine injury, so removing one without the other can do harm.
• Open or remove the shoulder pads when needed for chest access. In cardiac arrest, the chest has to be exposed for compressions and AED pads. Trained responders open the front of the pads or take them off in a coordinated way.

These steps are part of what an athletic trainer or emergency medical technician is trained to do. Coaches and volunteers should rehearse them with the people who will be at the field. Details depend on the equipment brand, so practice with the equipment your team uses. Our article on the role of the athletic trainer explains how trainers prepare for emergencies like this.

How to use an AED

AEDs are designed for people with no medical training. They give spoken instructions and, in many models, visual prompts. They analyze the heart rhythm and advise a shock only when it is needed, so they cannot shock a person who does not need it.

1. Turn it on and follow the voice prompts.
2. Expose the chest and dry it. Wipe away sweat. If there is a lot of chest hair, many kits contain a razor to shave a small area for the pads.
3. Attach the pads as shown in the pictures: one on the upper right chest, the other on the lower left side.
4. Plug in the connector if the device requires it.
5. Stand clear while the device analyzes the heart rhythm.
6. Deliver the shock if the device advises it, after making sure that nobody is touching the person.
7. Resume CPR immediately after the shock, starting with compressions, and follow the device's two-minute cycles.
8. Continue until EMS takes over or the player begins to move and breathe normally.

For young children, many AEDs come with smaller pediatric pads or a pediatric setting. If none are available, rescuers are generally told to use adult pads rather than delay.

Making sure the AED is ready

An AED is useful only if it is on site and works. Programs should:

• Keep it accessible. It should not be in a locked office or a different building from the field. For games and practices, it should travel to the field.
• Know where it is. Staff should be able to say where the AED is and how to reach it within a minute or two.
• Check it regularly. Most devices show a status indicator. Replace batteries and pads before they expire, and keep spares.
• Keep supplies together. A bag with a towel, razor, gloves and a facemask removal tool saves time.
• Plan for away games. Ask the host where its AED is and who is responsible.
• Check local law. Many states encourage or require AEDs in schools, and some set rules on training or placement. The details vary.

Cost and funding are common obstacles for small schools and youth leagues. Some health departments, hospitals and nonprofit groups offer grants or donations. If your program does not have an AED, ask the school or league office what it would take to get one.

Emergency action plans and practice

A written emergency action plan turns equipment into a response. It should name who does what, so that nobody has to decide in the moment:

The plan should list the address and directions to the field for 911, the location of phones and cell signal, the key holders for gates and the hospital the ambulance will use. Teams should rehearse it every year before the season, ideally with the athletic trainer or local EMS. Our article on emergency action plans for football teams goes through the plan in more detail.

When it happened in a stadium

In January 2023, an NFL game was halted after a player collapsed on the field and medical staff treated him with CPR and an AED before he was taken to a hospital. The event drew widespread attention to the preparations that every field needs. Professional teams have trained staff, ambulances and equipment on site by league rule, while many youth and school fields depend on volunteers and a nearby phone. The lesson is that preparation, not a stadium's size, decides how well a team responds.

After an event

If a cardiac event occurs, the response does not end when the ambulance leaves. The team should notify the family, protect the player's privacy, replace used AED pads, have the device checked and review what worked and what did not. Players and staff who witnessed the event may need support, and the school or league can arrange counseling. The hospital and the player's physicians decide when and whether he returns to play.

What parents and players can ask

• Is an AED on site at practices and games, and where is it kept?
• Who is trained in CPR and AED use?
• Is there a written emergency plan for this field?
• Is an athletic trainer or medical professional present?
• Does the team require pre-participation physicals?

To find school programs and ask these questions, use our high school directory. Recreational programs are listed in the Play section, and college programs in the college section.

The short version

• Cardiac arrest is an electrical failure that causes collapse, no response and abnormal or absent breathing, and is different from a heart attack.
• Young athletes can have hidden conditions, so warning signs such as exercise fainting, chest pain and a family history of sudden death need a doctor's attention.
• Survival depends on speed: call 911, start CPR at once and use an AED as soon as possible.
• The AED is made for people with no training, and it will not shock someone who does not need it.
• The AED should be at the field, checked regularly and equipped with supplies and a facemask removal tool.
• A written emergency action plan with assigned roles, practiced before each season, saves time.
• Take a hands-on CPR and AED course, because reading is not a substitute.