A 14-year-old girl who is physically fit has an estimated maximum heart rate of 204 beats per minute, according to TeensInCharge.org. The recommended target heart rate range for exercise for the same girl is 122 to 163 beats per minute.
For a nonathletic girl of the same age, the maximum heart rate is 212, while the recommended exercise target range is 127 to 170, TeensInCharge.org reports.
A physically fit boy of the same age has a maximum heart rate of 198 with a recommended exercise range of 119 to 158, while a nonathletic boy has a maximum heart rate of 206 and a recommended exercise range of 125 to 165 beats per minute, the site reports.
