Patients can sleep during the daytime during ECG, they should avoid strenuous exercise during ECG, keep a record of their work and rest time, and consult a doctor if they experience chest tightness or other discomfort. Patients can sleep during the daytime during an ECG, but they should pay attention to the sleeping position, so that the electrodes do not fall off, so as to avoid affecting the monitoring results. It should be noted that patients should not do strenuous exercise during the time of ECG, because strenuous exercise will not only interfere with the results of monitoring, but also may cause patients to sweat a lot, which will make the electrodes fall off, and will affect the results of the ECG, and the patients should also keep a record of the time of sleeping, waking up and other rest and relaxation. In addition, patients should pay close attention to their symptoms during ECG, and should seek immediate medical attention if they experience chest tightness, palpitations, shortness of breath, and other uncomfortable symptoms. Patients who can sleep during the ECG should follow the doctor’s instructions for monitoring, and if any abnormality occurs, they should go to the hospital in time and take treatment measures under the doctor’s guidance.