Why do boys have a faster heart rate than girls?
Guys have more hormones and in order to get rid of those hormones there hearts beat faster
Is that measuring heart rate? If so it is the same way for both boys and girls. There are different methods but the easiest way is to find the pulse under your neck (near your ears) and put medium pressure on it. count the number of beats in ten seconds and times that number by 6, that is your heart rate per minute.