41-Year-Old Zhang Xuefeng Passes Away | "Sudden Death While Running" Sounds Familiar | Are You Afraid to Run? The Truth Is Not What It Seems

On the evening of March 24, Suzhou Fengxuewei Lai Education Technology Co., Ltd. issued an official obituary. Education blogger Zhang Xuefeng died of sudden cardiac death after all efforts to save him failed. He passed away at 3:50 PM on March 24, 2026, in Suzhou at the age of 41. It is reported that on the day of the incident, at 12:26 PM, Zhang Xuefeng felt unwell after running at the company and was rushed to the hospital. Despite rescue efforts, he was pronounced dead, with the hospital diagnosing the cause as sudden cardiac death. Two days before the incident, Zhang Xuefeng had checked in on social media after a run, completing 7 kilometers on March 22, with a total running distance of 72 kilometers that month.

Not only Zhang Xuefeng, but in recent years, media frequently report cases of “sudden death among young and middle-aged runners.” Does this mean people have stopped running? Journalists reviewing previous expert interviews and popular science articles found that the truth is not so simple.

What is sudden cardiac death?

Medically, sudden death is defined as an unexpected death caused by natural disease within 6 hours of symptom onset. It is mainly divided into cardiac and non-cardiac types, with cardiac causes accounting for over 80%.

Is running likely to cause sudden death?

It is important to clarify that running itself is not the culprit. Improper exercise combined with underlying health conditions is the core trigger for sudden death.

A 2025 study published in the top international medical journal JAMA, covering 29.31 million marathon and half-marathon finishers, showed that the incidence of cardiac arrest during these events was only 0.54-0.60 cases per 100,000 people, with a death rate of just 0.20 per 100,000, approximately 1 in 500,000. Domestic marathon sudden death rates are about 0.44-1.54 per 100,000, consistent with international data.

In comparison, the annual rate of cardiac sudden death among the general population in China is about 40 per 100,000, nearly 70 times higher than marathon risks. In other words, running does not need to be “blamed.”

More importantly, authoritative research confirms that long-term regular running can reduce cardiovascular mortality by 20% to 40%. People who exercise regularly have a much lower overall risk of sudden death than sedentary individuals, whose risk is more than five times higher.

Regarding the perception that running accounts for a high proportion of exercise-related sudden death cases, some believe this is due to the large number of participants, creating a “perception bias,” rather than an actual higher risk from running itself.

Is sudden cardiac death unpredictable?

A cardiologist told reporters that early symptoms of sudden cardiac death are often hard to detect, but not entirely absent. Cases usually involve underlying health issues and are related to factors like high stress and unhealthy lifestyles. Early symptoms include persistent fatigue, chest tightness, or chest pain after short-term staying up late or exertion. Unfortunately, young people often ignore these signs, which is why young cases of sudden cardiac death are sometimes heard of.

Are there warning signs before sudden death?

When the body shows any of the following six signals, alertness to the risk of sudden death is crucial:

1. Recent or worsening chest tightness

If chest tightness suddenly occurs after activity and eases with rest, it may indicate coronary artery disease.

If there was a history of chest tightness that has worsened recently, it suggests that stable plaques may have developed into large ruptures, leading to acute myocardial infarction.

2. Palpitations

Irregular episodes of rapid heartbeat often result from tachyarrhythmias.

Most arrhythmias are less dangerous and unlikely to cause sudden death, but frequent episodes of ventricular arrhythmia carry a risk of developing into ventricular fibrillation.

3. Bradycardia

The heart’s rhythm is initiated by specific pacemaker cells. If these cells deteriorate, the heart rate slows, potentially leading to cardiac arrest.

A heart rate below 50 beats per minute and low blood pressure can cause prolonged cardiac arrest, risking sudden death.

4. Fainting

Fainting is an important warning sign. Most fainting episodes are caused by sudden slowing or stopping of the heartbeat, leading to insufficient brain blood supply.

Sometimes, fainting lasts only a few seconds and resolves on its own; if not, it can lead to sudden death. Unexplained fainting should be taken seriously and investigated promptly.

5. Unexplained fatigue

Unexplained fatigue, weakness, or water retention, especially with chest tightness, should raise suspicion of sudden death risk. These may be caused by myocarditis or cardiomyopathy.

Myocarditis is common among young people, often occurring 1-2 weeks after a cold, with symptoms like fatigue, chest tightness, and weakness, which can quickly lead to acute heart failure. Rest and avoiding strenuous activity are essential.

6. Blackouts and limb numbness

Stroke is also a significant cause of sudden death. Symptoms include unilateral vision loss, limb numbness or weakness, or unsteady gait with a “cotton-wool” sensation. These signs should prompt suspicion of a stroke.

Seize the golden 4 minutes; it can save lives

In the most dangerous situation—cardiac arrest—rescue is a race against death. The “golden 4 minutes” is the critical window for emergency response. Every minute delay decreases the chance of survival by 7% to 10%.

If someone nearby suddenly collapses, take immediate action:

1. Call 120 immediately: clearly state the location and condition.

2. Perform CPR: if the person is unresponsive and not breathing, start continuous chest compressions (position: midpoint between the nipples, depth 5-6 cm, rate 100-120 per minute).

3. Find an AED (automated external defibrillator): if in a public place, retrieve an AED and follow voice prompts.

Every second counts—more attempts mean more hope.