Performance Test Exemplar – Affect of Exercise on HEART RATE

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-- Performance Test Exemplar –
Affect of Exercise on HEART RATE
Unit 2 of Human Body – circulatory & respiratory
A. The question I will try to answer:
How does the amount of time jogging in place, affect your heart rate?
B. Hypothesis:
I think that jogging in place will increase the rate at which my heart beats.
C. Materials I will use:
1- Stopwatch
Dumbbells and books (labs 1,3,5 only)
D. Procedure I will follow:
1- Sit still and breathe normal for a few minutes until you feel relaxed.
2- Place your hand on your radial artery (wrist) and count the beats
(pulse) for 15 seconds.
3- Multiply the number from step two by 4 and record your results on
the table
(this will be your resting heart rate),
4- Jog in-place for one minute.
5- Immediately after stopping place your hand on your wrist and
count the beats
(pulse) for 15 seconds.
6- Multiply the number from step five by 4 and record your results on
the table
(this will be your exercising heart rate).
7- Sit still and breathe normal for a few minutes until you feel relaxed.
8- Take your pulse and record your results when you have reached
your original
resting heart rate.
9- Repeat steps 4 – 8, three times increasing the time of exercise by
one minute
each time.
E. Observations:
-In order to return my heart back to a resting heart rate, I needed to sit down and relax
for about 2 minutes.
-It was difficult to keep my pace of jogging consistent, so I had someone help me keep
track by a beat or a cadence.
-My pulse was much stronger while I was jogging in place and was easy to find.
F. What I found out:
I found out that the more exercise I do the higher my heart rate will
increase. Looking at the graph (the data shown) above you can
observe a steady increase in heart rate with the increase of time
spent jogging-in place. The longer I jogged in place, the faster my
heart rate was. I started with 69 bpms on average each time and my
heart rate increased to 119 (1st ), 132 (2nd), and 145 (3rd). So there is
proof that jogging in place (exercise) causes the heart to beat faster.
This makes sense because we know from class that our body needs
glucose and oxygen to make energy. The muscles we are using to
jog in place require more energy the more that we use them. We also
know our body delivers glucose and oxygen to all the muscle cells of
the body, through the blood stream. The blood is moved throughout
the body by the heart. To make more energy, we need more glucose
and oxygen to arrive at the muscles.
So the heart beats faster and faster to get oxygen and glucose to the
cells to make more and more energy. Next time I would test how my
breathing rate is affected by jogging, because I know that I inhale to
get oxygen into the blood.
Was my hypothesis correct or not? Explain
My hypothesis that my heart rate will increase with jogging in place
was correct. It was correct because my data showed an increase of
63 beats increase on average for my 3 trials, compared to my resting
heart rate.
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