There are no “three manifestations” of sudden running death. Sudden running death can be characterized by chest tightness, chest pain, fainting and other manifestations, which vary from person to person. Strenuous exercise can lead to sudden cardiac death, sudden death before the patient may appear chest tightness, chest pain and other manifestations, and there is a clear correlation with the activity. Dizziness, headache, blackouts or repeated fainting may also occur during activity. Some people may also feel significant palpitations in the precordial area, arrhythmia, and chest discomfort, which may also be accompanied by the presence of symptoms such as pallor and profuse sweating. If any of these symptoms occur, you should be vigilant and stop strenuous exercise and seek medical attention promptly. You should be aware of the need for proper exercise on a daily basis.