Question

what is the definition of a resting heart rate?
o the number of times the heart beats in relation to blood pressure
o the number of times the heart beats while doing an aerobic activity after a period of rest
o the number of times the heart beats in 1 minute while sleeping
o the number of times the heart beats in 1 minute when not active

Explanation:

Resting heart rate is measured when the body is at rest, not during activity or in relation to blood - pressure. It is typically measured in a non - active state within a minute. Sleeping is a specific type of rest, but resting heart rate can be measured while awake and at rest too.

Answer:

the number of times the heart beats in 1 minute when not active