1. Name: Julia
Partners: Marley, Dong Hyun
Date of experiment: March 23, 2011
What factors affect the heart rate?
Aim: To find out if your heart rate will be affected or different when running in place
or actually running around at the same speed and time.
Hypothesis: I think that my heart rate will be higher when jogging in place because
I’m not dispersing my energy.
Variables:
Input variable: We will test whether running in place or around a track
affects your heart rate differently. So we will be changing the way of running.
Output variable: We will measure my heart beats per minute after jogging in
place, my heart rate after jogging around the track, and my normal pulse
before running by using a stopwatch to record my time jogging and I will
measure it by my fingers pressed to my neck to record my pulse, or heart rate
for a minute (recorded with stopwatch).
Control variables:
Control variable 1: We will keep the amount of time I will jog the
same by timing my jogging in place and around to 1:30
minutes each time with a stopwatch.
Control variable 2: The speed I am running at. Marley will make sure
the speed I run stays on a jog, not a spring or walk, by
observing me
Control variable 3: Marley will keep the person running (Julia) the
same all jogging times.
Materials:
• Me

2. • My running/jogging shoes
• Stopwatch for recording running and taking pulse time
• Pen and notebook for recording data
• Computer for inputting data
• Track for running together
Method:
1. I will take my resting heart rate 3 times
2. Record on data
3. Calculate the Average
4. I will jog around the track for 1:30 minutes
5. I will take my pulse using my finger pressed to the neck for 15 seconds
6. Record the heart rate down
7. Multiply it by 4 to get the BPM
8. Repeat steps 4-7 two times
9. I will jog in place for 1:30 minutes
10. I will take my pulse using my finger pressed to the neck for 15 seconds
11. Record the heart rate down
12. Multiply it by 4 to get the BPM
13. Repeat steps 9-12 two times
Results:
DATA TABLE
Trial 1 beats/ Trial 2 beats/ Trial 3 beats/ Average beats/
minute minute minute minute
Around 128 144 160 144
Track
In place 140 120 136 132

3. Conclusion:
Our data shows that running around the tracks heart rate is more than running
in place. I think it is because running around the track you need to open your legs and
go forward, though when you are running in place, it is like jumping, but that was not
our hypothesis, our hypothesis was wrong. We thought that it would be more tiring to
try and write in the same position. When the more times I run when running around
the track, the beats per minute increase. Even though the resting heart rate goes back,
my heart rate will still increase; I have no idea why it is like this. It is probably
because the first time I did the resting rate it is 66 beats per minute, but then I could
never get back to 66 after running once, I kept staying around 80. So we changed our
resting rate and using my finger on my neck instead of the electronic one, so that
might be the reason why my rate would increase.
I think our data is not reliable. Because you can’t control your speed and the
way you run exactly the same. And according to the data, the trials difference is big.
Also when jogging in place is hard to control the same speed, and the way of running.
I might run one time with bigger steps and another with smaller steps, same with the
running around track, you don’t know each steps distance, it is not exact. But through
the trials it is pretty accurate but not reliable. As you can see this is really hard to
measure, because you can’t make it accurate, and it is hard to control yourself exactly
the same.
Evaluation:
I think what worked well to in our method is that it is very organized. We
finished it early and smoothly in the first session. Unlike other people they had to use
at least 2 times to finish recording data. Are whole data is unreliable so I think we
didn’t have lots of part really well, except being organized. I think our method is
really good and organized, but the topic we chose is too hard to control. Next time we
have to be more careful about the speed. If I did this experiment again, I will do a
different input variable that is more accurate to test the heart rate. Because the input
variable we chose for this experiment is too hard to measure. So I actually don’t
prefer any future testing, I don’t want to do it anymore because it is so hard to
measure and it can’t be 100% accurate, not if we use the treadmill which is accurate
about the speed and time, but what would the input variable be?