Question

1. monitoring heart rate determines... *

time of the exercise.
duration of the exercise.
intensity of the exercise.
frequency of the exercise.

Explanation:

Heart rate is a key indicator of exercise intensity. Higher heart rates typically correspond to more intense physical activity, while lower rates indicate lower intensity. Time and duration refer to when or how long exercise occurs, and frequency refers to how often it is done—none of these are determined by heart rate monitoring.

Answer:

C. intensity of the exercise.