Final answer:
The question is about the terms related to aerobic activity, including duration, perceived exertion (RPE) scale, and frequency.
Step-by-step explanation:
Duration refers to the amount of time spent at each aerobic session. This is how long you engage in aerobic activity, such as running or swimming.
Perceived exertion (RPE) scale measures the feelings caused by your exertion. It is a subjective rating of how hard you perceive your workout to be, based on factors like heart rate, breathing, and muscle fatigue.
Frequency is how often you perform aerobic activity. It can be measured in days per week or sessions per week.
Learn more about Aerobic activity