Answer:
The correct answer is a. True
Step-by-step explanation:
The resting heart rate for a normal adult is between 50 to 90 beats per minute. Resting heartbeat below 50 is possible in persons who are very good athletes. A more cardiovascular fitness is seen in good athlete and they can have a resting heart rate near to 40.
If a normal resting heart rate falls from 60 that condition is known as bradycardia. Mostly old people are more prone to it. Tachycardia is a medical condition in which a person's resting heartbeat reaches above 100.
Both the condition bradycardia and tachycardia shows the problem related to heart and require medical attention.