A normal human heart rate should be within 60-100 beats per minute, so a heart rate of 48 beats when you get up in the morning is not normal. Heart rate will change with circadian rhythm, in the morning, the heart rate is the lowest value of the whole day, but should be around 60 beats, but there are also patients who belong to the situation of relatively slow heart rate, such as long-term sports and exercise people, or professional athletes, etc., usually the heart rate is relatively slow, so the heart rate of 48 beats in the morning is also normal for the above-mentioned people. If you have a heart rate of 48 beats in the morning, it is recommended that you have a 24-hour ambulatory ECG test to check for pathological factors.