Delivering What Muscles Need

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. My heart rate was the highest when I jogged in place. I measured 34 pulses in 15 seconds. That is a heart rate of 136 beats per minute!
   
2. Standing still increased my hear rate the least. It was only measuring at 20 beats every 15 seconds, a heart rate of 80 beats a minute.
3. No, my order was inaccurate. As can be seen in the chart, the data begins as rising and then drops towards the end.
   
4. I noticed (obviously) my heart rate was rising. I also noticed that the beats were faster and a little louder as the heart rate rose.
   
5. I think my heart rate changed because, as the activities got harder, I needed more energy to complete them. My heart had to pump faster to get the nutrients and oxygen they needed to keep working.
   

Activity

Standing

Stretching

Acting like a Fool

Jumping Jacks

Jogging in Place

Ranking

1

2

3

4

5

Pulses in 15 Seconds

20

30

31

29

34

x4

x4

x4

x4

x4

x4

Heart Rate (Beats per Minute)

80

120

124

116

136