Exercise lowers resting heart rate.
ExercisePathological conditions where tachycardia occurs:SepsisFeverAnemiaHypoxiaHyperthyroidismHypersecretion of catecholaminesCardiomyopathyValvular heart diseasesAcute Radiation Syndrome=== Bradycardia ===Bradycardia was defined as a heart rate less than 60 beats per minute when textbooks asserted that the normal range for heart rates was 60100 bpm
Heart rates assessed during treadmill stress test that do not drop by more than 12 bpm one minute after stopping exercise (if cool-down period after exercise) or by more than 18 bpm one minute after stopping exercise (if no cool-down period and supine position as soon as possible) are associated with an increased risk of death

