The correct option is A Less than 60 BPM.
The resting heart rate is the number of beats per minute that a heart's person produces while this one is resting.
In a normal person, the resting heart rate is between 60-100 BPM. The more trained the person is, the lower the heart rate will be. On the other hand, if the person is not active enough, the heart rate will be higher.
In conditioned people, such as athletes, the resting heart rate is lower than the average. It can go from 60 BPM to 35 BPM. Less than this is called Bradycardia and is a risky condition.
In the image, there is a chart with the different BPMfor men and women and their ages. The red ones are inadequate BPM, The yellow ones are normal BPM, the green ones are good, and the darker green ones are excellent BPM.
In conclusion, the normal resting heart rate for a conditioned person is less than 60 BPM.
You can learn more about the heart here:
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