In a normal human adult, your heart beat will on average be 60-100 beats per minute. However one thing about medicine is that we never treat the numbers but the patient, and there are people who's heart rates can be lower or higher.
Additionally children and infants to tend to have higher heart rates.
You must consider if you are putting yourself in danger by assisting them and the information you should provide first is where you are located what you seen happen you should ask them if you should do anything to help ?
Most likely obese, but it depends on the female's height and weight