The average heart rate for a 13 year old female, is approximately the same as an adults, which is 60 to 100 bpm. A lower heart rate is common in those who are very athletic. A higher heart rate can be more common in someone with much stress, a little less active, or someone who drinks a lot of caffeine on a daily basis. A resting heart rate of 116 is a little high for your age, but it sounds as if you weren t experiencing any symptoms at the time, such as difficulty breathing, shortness of breath, sweating, pain et cetera. If you were a little worked up about anything, or had caffeine that day, these could contribute to your higher rate. Your target heart rate during exercise can be determine by a formula known as the Karvonen Formula. It is as follows: 220 minus your age X 60% for the lower end and 220 minus your age X 90% for the upper. Meaning, your target rate during exercise should be between 124 and 186. 220-13=207 207x0.60=124 220-13=207 207x0.90=186 It sounds as if your target heart rate, although on the higher side, was still within normal limits for your age group and if you weren t experiencing any abnormal symptoms, I would not worry about it. If you are concerned about the resting heart rate, I would talk to your family doctor. They can work with you and help you determine why it was a little higher than normal. Good luck to you! I hope I was able to help out!