How should I keep an observation record when I feel premature beats after coffee, staying up late, or exercise?

Record your sleep, drinks, exercise, mood, and medication use before the episodes, as well as the time of onset, duration, and accompanying symptoms. Do not actively trigger episodes by repeatedly consuming drinks or doing strenuous exercise. If episodes are frequent, affect your daily life, or are accompanied by fainting, chest discomfort, or significant shortness of breath, seek medical attention promptly.