The body fat percentage below which a woman is considered to be underweight is

I think it's around 20% 25 %

Less than the 5th percentile I know this because I got weighed in school and than every body got a paper and it tells you if you are this percentile you are under weight ,healthy weight, overweight, or obese. Sorry if I didn’t help I tried

The average resting heart rate (hrrest) for a 34 year old is 73 beats per minute2. 34 year old males average heart rates of 71 bpm while females average slightly higher at 76 bpm2. the normal resting heart rate range for all adults and children 10 and over is between 60 and 100 beats per minute3. 90% of 34 year olds resting pulses fall within the range of 54 to 92 bpm. in general, an adult's resting heart rate will be lower for those in better athletic condition.