Final answer:
The term used to denote a heart rate below 60 beats per minute is bradycardia, which can be a normal finding in well-trained athletes but might also indicate a health issue if accompanied by certain symptoms.
Step-by-step explanation:
The term used to indicate a heart rate below 60 beats per minute is bradycardia. For an adult, a normal resting heart rate (HR) ranges from 60 to 100 beats per minute. A heart rate below this range is referred to as bradycardia. It's important to note that while bradycardia can be a sign of efficient heart function and cardiovascular fitness, particularly in athletes, it can also be indicative of potential health issues. If accompanied by symptoms such as fatigue, dizziness, or chest pain, it may suggest that the heart is not pumping enough oxygen-rich blood throughout the body, which can be a serious medical concern. In contrast, tachycardia is a heart rate that exceeds 100 beats per minute in a resting state and may be associated with conditions such as fever, anemia, or hyperthyroidism.