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Exercise and Heart Rate

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Emily Harward

on 30 June 2014

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Transcript of Exercise and Heart Rate

Part II question, background and hypothesis
Question: How will isometric exercises affect heart rate?

For part I, we measured how running, which is often classified as cardiovascular exercise, affects heart rate. I was interested in finding out how other types of exercise might affect heart rate.

Hypothesis: I think that isometric exercise will still increase heart rate, because the increased load on the muscles will require more oxygen and generate more carbon dioxide.
Part II conclusion
Part II Data
Part II conclusion discussion
It would be interesting to see how long it takes for the heart rate to return to normal after ending the isometric exercise.

I would like to have each of the subjects do the procedure for part one so that I could compare how isometric and cardiovascular exercises change heart rate; I think that running may cause a larger increase in heart rate than holding high plank.
Exercise and Heart Rate
Each subject's heart rate increased during the isometric exercise and decreased after the exercise.

Heart rates increased from 12-26 beats per minute; there was no correlation between resting heart rate and the amount that heart rate changed (a lower resting heart rate did not necessarily mean that heart rate would increase the least).
Part I Conclusion

There was an overall pattern of increased heart rate while running and then decreasing heart rate after stopping.

The way the data was reported makes it hard to draw more specific conclusions for part I because:
The data was reported in ranges

This means that you can't tell if someone's heart rate changed by one beat per minute or by nine beats per minute (see subject EH; his heart rate changed from 86-90 to 91-95, which means his heart rate could have gone from 90 to 91 or from 86 to 95).

We also can't see any changes that took place when the heart rate was below 70 (see subject TP; in the first minute of running, his heart rate could have changed from 69 to 76 or from 40 to 80).
The graphs don't show the change
in heart rate

The graphs show the percentage of subjects whose heart rates are in a particular range, but doesn't show how the heart rate changed. For example, after running for one minute, most subjects had a heart rate between 86-90 beats per minute. Even if we assume that this represents an increase in heart rate for each subject, we can't see how much any individual subject's heart rate increased. This makes it impossible to use the graphs to see patterns in change for an individual's heart rate.

1. Measure the subject's resting heart rate.

2. Have the subject hold high plank for one minute, then take his heart rate; continue taking the subject's heart rate every minute until the subject has been in high plank for three minutes.

3. Let the subject rest; take his heart rate every minute for two minutes.
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