According to the principles of FITT, what is the relation between the intensity of an exercise and the time an exercise needs to be performed?

According to the principles of FITT, what is the relation between the intensity of an exercise and the time an exercise needs to be performed? Intensity has to do with how hard the particular exercise is, while time has to do with the duration of time the exercise is performed.

Explanation:

there should be recorded video of the class under the assignments for the day