Answer: Exertion simply means the use of energy for a particular activity especially during physical exercise.
Explanation:
Exertion simply means the use of energy for a particular activity especially during physical exercise. It is a strenuous effort that involves generating force or expending energy.
Emily loved the exertion simply means that Emily loves the energy that she burns when she jogs. This can be seen in the text as she says she feels alive anytime she jogs.