Answer:
Overload: A principle of exercise that states that the only way to improve fitness is to increase over time. This can mean increasing the amount of resistance, increasing the amount of time, or increasing the speed. When just beginning an exercise, it is generally difficult
The answer is probably A but it could be all of them.
Resting Heart Rate is:
c)
Number of contractions of the heart that occur in a one minute when your body is at rest.
