Delivering What Muscles Need

I had a lot of fun during this activity. I liked that we did five different activities and our heart rate rose as the activities became more strenuous. I finally learned about why your heart rate would sometimes be fast and sometimes be slow, depending on what activity you were doing. I hadn't known that before. It was really crowded with everyone running and jumping around. In the beginning, everyone was counting their heartbeat while doing the activity, but we were supposed to do it after, so we had to start over. It was hard to count with all of the other people making noise.

Reflection Questions:

1. Which activities increased your heart rate the most?
2. Which activities increased your heart rate the least?
3. Was the order in which you ranked the activities accurate? (It's good to be wrong!) Explain.
4. What changes did you notice about your heart rate as you became more active?
5. Why do you think your heart rate changed when you were more active? What inference can you make? (Use pages 65–66 of your reference book to help you answer this question.)

Answers:

1. The skipping and jumping jacks raised my heart rate the most. They were putting the most stress on my heart, so it started to pump very fast to get enough oxygen to my muscles.
2. Sitting and standing increased my heart rate the least. I didn't need as much oxygen because my muscles weren't working hard. 
3. I was accurate when I ranked the activities. My heart rate number got bigger when I did the next activity.
4. My heart rate got a lot faster when I was more active. I needed to get a lot more blood and oxygen to my body, so my heart needed to pump more of it faster.
5. I think that because I was straining my muscles more,  they needed more oxygen. Our blood carries around oxygen, so the heart needed to pump out more blood.