Why the heart rate is low during the morning?
Patient: Age 78, heart rate sometimes as low as 39 when arising in the morning,no noticeable symptoms. Also while hard exercising the pulse will suddenly drop from130-140 to 70-80 with no outward symptoms during the workout. After a few moments of continuing jogging, the heart will increase to 140 and slowly increase to a rate of approx. 155. Normal perspiration and uniform decrease in heart rate during cool down. My age is 77,good body mass index, cholesterol 175 with a good ratio, EKG and Holter and stress test show no problem, Please evaluate and advise. Doctor: hello,  Normally, heart rate drops during rest and more during and in elder. Also, your maximum heart rate which is achieved during exercise is also fine. So you don't have any symptoms and holter is normal, so i think no intervention is needed at this stage.   Also, you should get one thyroid test done, which can also cause low pulse rate.