It is normal for athletes to have a heart rate of 60-100 beats/min. Some athletes can have a heart rate of less than 60 beats/min when they are quiet, but not less than 50 beats/min. You cannot look at heart rate data mechanically, but you still have to combine it with symptoms. If the heart rate is below 60 beats/min, no dizziness, weakness, and a strong pulse, it is also normal. If the heart rate is below 60 beats/min, accompanied by dizziness and weakness, it means that the blood supply to the brain is insufficient. If there are no symptoms, a heart rate below 60 beats/min is not considered a disease. Because athletes long-term training leads to a powerful heart muscle pumping, heart rate is slower than people who do not exercise, most athletes heart rate between 60-70 times / min, athletes heart rate slower than others, is normal, not a disease, and does not affect the continued training.