Heart rate is calculated as the number of times your heart beats every minute, and the normal heart rate varies with each person. Through heart rate, you can monitor your fitness level and health condition. The heart is a muscular organ that can pump about 100 thousand times a day, to send oxygen-rich blood and nutrients throughout your body. Therefore, heart health is very necessary to be maintained, including being aware of early signs of interference that may occur by observing a normal heart rate. Abnormalities in heart rate can indicate impaired function and performance of the heart. Heartbeat speed Normally, adult heart rate at rest ranges from 60 to 100 times per minute. However, there are many factors that can affect the normal heart rate, including activity, fitness, body position when standing or lying down, air temperature, medications, emotions, and also body size. People who are accustomed to physical activity, for example athletes, tend to have normal below-average