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How does holding your breath affect your heart rate?

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Daisy Guzman

on 9 September 2014

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Transcript of How does holding your breath affect your heart rate?

By: Ethan, Josh, Carla and Daisy
How Does Holding Your Breath Affect Your Heart Rate?
Research #1
Your body normally uses oxygen to produce energy, because of this heart rate can can change due to breathing rates. Physical and metal stress can change heart rate, usually increases it. Your body will try to remain at 1 to 4 ratio of breathing to heart rate ratio.
Relationship Between Heart Rate
& Breathing Rate
= 80
Research #2
Depending on if your heart rate slows down or speeds up, your blood pressure drops or increases. When your blood pressure drops, homeostasis isn't working well.
If we test how holding breath affects heart rate, then heart rate will slow down while holding your breath.
Reason for Hypothesis:
"If holding your breath affects your rate, then your heart rate will slow doing during that process of holding your breath" is a reasonable hypothesis because when you hold your breath you cause less oxygen and energy to be used or made. Which means your heart is doing less work and can take a slower rate of beating. However, when you stop holding your breath, your heart rate will go up again and start to create oxygen and energy (homeostasis).
Confounding/Controlled Variables:
- All participants were standing
- Person's body type
- Stress in subject
Extraneous (Ignored)
- If the person wall tall or short
- Where the person was standing
Independent Variable:
- If the person was breathing
Dependent Variable:
- Variation of heart rate
Experiment Design #1
Experiment Design #2
Experiment Design #3
Conclusion Part 1:
Conclusion Part 2:
Conclusion Part 3:
Conclusion Part 4:
First, gather your supplies. Including a timer to record the time they hold their breath. Then 10 people to test on. A pen or pencil with the record sheet to record all your results. You should also get a calculator to make the math easier. After that, arrange your supplies and begin experimenting on the people chosen.
Our results didn't completely support our hypothesis. Our hypothesis was that the heat rate would decrease if they held their breath.
Of course with the experiment came flaws. Major flaws included physical health, diet and BPM range. Minor flaws could have been been controlled, but given who we could test made them harder to control.
We would've gotten these results based on the flaws, but our experiment shows it's more likely based on the BPM range. Our results could have been off because of how everyone had different BPM. But even with this data we could conclude a trend was going on.
Some follow up experiments could be to repeat the entire experiment in a more controlled environment. Or test to see if breathing more rapidly and heavier affects heart rate. Another possible experiment could be to test exercise and the hearts ability homeostasis.
Your heart rate goes up more or your bodies processes are being used. When you exercise your muscles are being used which then makes your heart rate go up. Or when you hold your breath your heart rate goes down because your lungs aren't working and your body is trying to reserve oxygen.
Using your timer ask your person to just breath normally while u take their pulse for 15 seconds. You should typically measure their pulse using their neck. Record that number into your table and do not do any math. Now tell the person to take a deep breath but do not hold their breath yet. You should then get your timer and set it at 15 seconds before ringing. When you're ready to start, tell them to hold their breath when you say 'go' and start your timer
When they're holding their breath make sure you watch them to see that they aren't breathing, because they ran out of breath. If they happen to breath restart the timer and tell them to try again. After the test, measure their pulse for 15 seconds again just like the last time. Record the results in your sheet. After you finished with your person, you can tell them to leave. Repeat all the nine steps 9 more times on the 9 different people. After you gathered all your results, multiply all your numbers by 4 to get the BPM and start your graph.
Based on our data we can see a trend! Also look at the averages we could see that they were far enough apart to rule out chance.We can also see an 11% BPM drop when they held their breath for15seconds then they took the pulse. From an average of 84 BPM to an average 74 BPM. Showing that there is something going on with holding your breath.
This concludes our presentation !
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