Why Do People Who Exercise Regularly Still Suffer Sudden Cardiac Death?

At 9:50 p.m. on March 24, 2026, the passing of Mr. Zhang Xuefeng, a renowned postgraduate entrance examination instructor, due to sudden cardiac death was confirmed. At just 41 years old, he was in the prime of life. The shocking, heartbreaking news has once again brought sudden cardiac death to public attention.

Sudden cardiac death refers to natural, sudden and unexpected death caused by cardiac conditions such as malignant arrhythmia and acute myocardial infarction, usually occurring within one hour of symptom onset. According to the Chinese Epidemiological Survey of Sudden Cardiac Death, approximately 550,000 people die from it in China every year. The proportion of victims aged 18–35 surged from 12% in 2015 to 28% in 2024.

Director Li Yanlin, a specially invited cardiology consultant at Shanghai Donglei Brain Hospital, noted from public information that Zhang Xuefeng exercised regularly. Many people assume: "People who exercise must be healthy — why would they suffer sudden death?" This is exactly a misconception.

Director Li explained that many fitness enthusiasts believe: "I work out regularly and stay in good shape. Minor chest tightness or palpitations are just tiredness; I can push through." The truth is that exercise does not guarantee a trouble-free heart. Some heart conditions are precisely exposed during exercise — such as silent coronary heart disease, hypertrophic cardiomyopathy, and inherited arrhythmias. These show no symptoms ordinarily but can easily trigger fatal arrhythmias and sudden death under increased exertion.

"Because you think you are 'healthy,' you are more likely to ignore warning signs," Director Li warned. If you experience chest tightness, palpitations, dizziness or shortness of breath during exercise, stop immediately and seek medical help — do not push through. Persisting could mean missing the final chance of survival.

Director Li further emphasized that young and middle-aged people with long-term smoking, staying up late and high mental stress, as well as patients with hypertension, diabetes and hyperlipidemia, are all high-risk groups for sudden cardiac death. In addition to controlling the "three highs," quitting smoking, limiting alcohol and maintaining regular routines, regular physical examinations can detect problems early for timely intervention. Electrocardiogram, echocardiography and Holter monitoring are basic tools for cardiac screening.

As a specialized hospital focusing on brain, heart and spinal health, Donglei Brain Hospital provides combined brain-heart screening, with an experienced expert team interpreting reports and developing personalized intervention plans targeting high-risk factors. Life is precious. Please stay alert and care for yourself and your family.