When people exercise, their muscles need more oxygen. The heart responds by beating faster and pumping more blood. Breathing rate also rises. This brings in more oxygen and removes carbon dioxide. Over time, regular exercise can strengthen the heart muscle, so it can pump more blood with each beat. This often lowers a person's resting heart rate. Drinking water is important during exercise. The body loses water through sweat, and sweat helps cool the body.
What does the audio version mainly add to the message?
- A stronger sense of priority, using volume, pace, and pauses to stress hydration as the key takeaway. (correct answer)
- A steady, even delivery that gives every fact the same weight, treating hydration as one detail among many.
- A slower pace on the science facts, using pauses to stress how the heart strengthens over time.
- A clearer sequence of steps, using pauses between sentences to help listeners memorize the order of events.
Explanation: The audio uses the very same words as the text, so what it adds is emphasis, not new information. The coach speeds through the science, then slows down, gets louder, and pauses on the line about drinking water. Those spoken choices signal that hydration is the most important point, which is why the answer about a stronger sense of priority through volume, pace, and pauses is correct. The option about a steady, even delivery is wrong because the coach does not give every fact equal weight; the whole point is that hydration stands out. The option about slowing down on the science facts misplaces the emphasis, since the coach actually speeds through those and stresses hydration instead. The option about a clearer sequence of steps is wrong because the coach's pauses spotlight one key line, not the order of events. Only the first choice matches what the audio actually emphasizes.