Pulse Rate and Exercise



Pulse Rate and Exercise

You know that the heart pumps blood around the body. You also know that blood carries oxygen to all of your body parts and carries away carbon dioxide. But what happens to your circulatory system when you exercise?

To do this experiment, first you’re going to need to know how to feel your heart beat by taking your pulse.

Taking Your Pulse

CAROTID PULSE

Take two fingers and run them alongside the outer edge of the trachea (windpipe). This pulse may be easier to find that of the radial artery. Since the carotid arteries supply a lot of the blood to the brain, it moves a lot of blood!

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OR

RADIAL PULSE

Take two fingers, preferably the 2nd and 3rd finger, and place them in the groove in the wrist that lies beneath the thumb. Move the fingers back and forth gently until you can feel a slight pulsation.

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You and your partner need to use which ever way is easier for you during your experiment.

Pulse Rate and Exercise Experiment

**You will need to work with a partner to complete this assignment**

Materials

• Stopwatch

• Skipping rope

• Calculator (optional)

Procedure

1. Find your pulse. Have your partner time you for 15 seconds while you count the number of times your heart beats. Multiply this number by 4. Show your work below. This is called your resting heart rate and it is recorded as bpm (beats per minute). It is how fast your heart beats when you’re body is still.

2. Now help your partner find their resting heart rate.

3. Make a hypothesis (a smart guess), about what you think will happen to your heart rate after skipping for 2 minutes, and how it will change 5 minutes after skipping for two minutes.

4. Have your partner time you for 2 minutes while you skip (if you mess up, just start skipping right away again). Right after you’re done, find your pulse and have your partner time you for 15 seconds while you count your heartbeats and write it down in the chart below. Take your heart rate 5 more times, after every minute, and fill out the rest of the chart below. Hint! Do your multiplication to find your bpm after you’ve finished timing all of your heart rates:

|Your Name |Right after skipping |1 min. after skipping|2 min. after skipping|3 min. after skipping|4 min. after skipping|5 min. after skipping |

| | | | | | | |

| | | | | | | |

| |x 4 = bpm |x 4 = bpm |x 4 = bpm |x 4 = bpm |x 4 = bpm |x 4 = bpm |

5. Now repeat step #3 for your partner. You’ll need to time them for 15 seconds right after skipping and for the next 5 minutes after skipping just like they did for you.

6. Do your multiplication to fill out your bpm for the chart.

7. Use a spreadsheet program, such as Corel QuattroPro or Microsoft Excel, or graph paper, to create a graph of you and your partner’s data. You may submit your digital graph to the Dropbox, or you may hand your graph into your teacher, along with this sheet filled out by you.

8. In your Journal, answer the question: “Explain how your heart rate changes right after exercise and 5 minutes after exercise. Why is your heart rate faster right after exercise compared to 5 minutes after exercise?”

Pulse Rate and Exercise Rubric

| |Level One |Level Two |Level Three |Level Four |

|Making a Hypothesis |You can make “guesses” about|With help from your teacher|You can make a prediction |You can make predictions |

| |the possible outcome of your|or your partner, you can |about the outcome of your |based on your prior |

| |experiment. |make a simple prediction |experiment based on your |knowledge from explorations|

| | |about the outcome of your |personal experience with |and investigations about |

| | |experiment. |exercise. |the outcome of your |

| | | | |experiment. |

|Following the Procedure |You have a lot of difficulty|You are somewhat able to |You are able to follow the |You are able to follow the |

| |following the procedure and |follow the procedure and |procedure and recording |procedure and recording |

| |recording your findings |recording your findings |your findings accurately. |your findings in a very |

| |accurately. |accurately. | |detailed manner. |

|Graph Creation |You can create a graph that |You can create a graph with|You can create a graph that|You can create a graph that|

| |shows people how heart rate |that shows people how heart|shows people how heart rate|shows people how heart rate|

| |changes after exercise with |rate changes after exercise|changes after exercise. |changes after exercise with|

| |limited effectiveness. |with some effectiveness. | |a high degree of |

| | | | |effectiveness. |

|Critical Thinking Skills |You have a lot of difficulty|You are somewhat able to |You are able to use your |You are able to use your |

|and Communication |using your critical thinking|use your critical thinking |critical thinking skills to|critical thinking skills to|

| |skills to answer questions |skills to answer questions |answer questions that make |answer questions that make |

| |that make you use knowledge |that make you use knowledge|you use knowledge from your|you use knowledge from your|

| |from your experiment and |from your experiment and |experiment and your own |experiment and your own |

| |your own knowledge and |your own knowledge and |knowledge and ideas. |knowledge and ideas clearly|

| |ideas. |ideas. | |and with detail. |

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