Heart rate is the measure of beating of heart per minute. The normal healthy resting heart rate of an adult is 60 to 90 BPM.
What is a heart rate?
Heart rate is the average number of time’s heartbeats per minute. A heartbeat is when the heart contracts to pump blood through your system. Heart rate is measuring by finding the body pulse. The unit of measurement for the heartbeat is "Beats per minute" (BPM). The healthy resting heart rate in adults is 60 to 90 beats per minute. The heartbeats below 60 are referring as bradycardia and rates above 100 are referring as tachycardia.
What determines your heart rate?
Your heart rate is determined by factors intrinsic to heart and regulatory pathway (brain and hormonal signals from the adrenal gland).
The obvious purpose of the heartbeat is to push blood throughout the body. The rate of the heartbeat is a factor influences cardiac output, volume of blood and speed of delivery of blood to every body cell. There are certain situations when the blood requires reaching cells more or less quickly.
Physical activity (or exercise), just standing up from resting can increase cellular requirement for both oxygen and blood nutrients (particularly glucose). Sensors located in the brain stem, and hypothalamus is responsible for the feedback regulation of the heart rate to meet the demands of your body cells. Relaxation and sleeping states generally require minimal cellular requirements.
There are individual differences in the resting heart rate, which are influenced by genetics, sex (females have faster heart rates than males), and state of health. These differences are in relation to personality, psychology and physical fitness.
Maximum heart rate
The maximum heart rate is the maximum number of beats your heart contracts during one-minute measurement. It is a useful tool to measure or predict the exercise level. It is a good practice to monitor your heart rate while doing exercises to confirm you are staying within a safe range or use it to monitor how well your exercise raises your heart rate to acceptable ranges and levels.
Based on your age and physical condition, a formula is in use to calculate your maximum heart rate. This method uses an age-predicted maximum heart rate formula:
Women: 226 - your age
Men: 220 - your age
Example: If you are a 40-years woman, your age related maximum heart rate will be 226- 40 years = 186 BPM (beats per minute), for a man with same age 220 - 40 = 180 BPM.
Physical activity and your Target Heart rate
Based on your age, pulse rate during exercise should be within 60 to 85 percent of your maximum heart rate.