Name: Anushka Rahman
Grade: 9-B
What is the effect of exercise on heart rate? Are they related?
~~Aim~~
To find out if increasing intensities of exercises make the heart rate increase
proportionally.
~~Introduction~~
I am going to investigate whether or not there is relative proportion between the
increase of heart rate and increase of intensity levels during exercise. In order to
find out, I will be doing a series of experiments that will be subjected on two
boys and two girls. They will be separated according to gender.
~~Hypothesis~~
My predictions related to this experiment are:
1) That the heart rate will increase significantly if not proportionally.
2) Different exercises will lead to different results of some nature.
~~Scientific Reasons~~
Explanations for my predictions are:
1) When we exercise, heavily or lightly, we tire out because our blood is
pumping hard, and our pulse rate is increasing. There is a fair chance that
the increase in intensity of exercise and heart rate are proportional, but to
be on the safe side of predictions, I have stated thus.
2) As different exercises have different intensity levels and attack different parts
of the body, we may react differently to each of them. This, I think is an
important fact when experimenting, as each exercise has to now be carefully
analysed and thought of before being used during the experiment.
~~Variables~~
There are three types of variables that we are experimenting with. They are:
A. Independent variable- this is the idea, which we are investigating.
B. Dependent variable- the things that we will/can measure.
C. Controlled variable- the things we can control.
Name: Anushka Rahman
A.
Grade: 9-B
The independent variables that are in this experiment are:
I. The heart rate
II. The level of intensity of the exercises
III. The proportion between them.
B.
The dependent variables that are in this experiment are:
I.
C.
The pulse rate before and after exercises.
The controlled variables that are in this experiment are:
I.
II.
III.
IV.
V.
VI.
VII.
VIII.
IX.
Equal number of people doing exercise.
The age group is the same.
All after been supervised. They have eaten the same kind of food all
day.
All are barefoot
The method of procedure and exercise will be the same for each
subject.
They will all be given time to rest between each exercise.
The time will be from 4 pm to 6 pm, when all subjects are relaxed,
but ready to exercise.
The exercises will take place indoors.
The same exercises will be repeated for each subject.
~~Subjects~~
A. Subject-#1 is a girl aged 14 years, fit, wearing clothes that she is
comfortable with. Has eaten properly, and according to plan.
B. Subject-#2 is a girl aged 15 years, fit, wearing clothes that she is
comfortable with. Has eaten properly, and according to plan.
~~Apparatus & Material~~





A stopwatch.
A pen or pencil.
Paper.
Room to exercise.
Subjects to work with.
Name: Anushka Rahman
Grade: 9-B
~~Procedure Of Exercise~~
Each subject will do these sets of exercises individually, so that no mistakes are
made during examination. This will also avoid distraction.
Step #1Take resting pulse rate of subject.
Exercise Type: Step-ups.
Duration of exercise: 2 minutes.
Check current pulse rate.
Rest until pulse rate returns to its original resting pulse rate.
To increase intensity levels the duration of exercise will be increased by two
minutes each time the exercise is repeated by subject. The exercise will be
repeated until the duration of exercise reaches 10 minutes.
Step #2Take resting pulse rate of subject.
Exercise Type: walking.
Duration of exercise: 2 minutes.
Check current pulse rate.
Rest until pulse rate returns to its original resting pulse rate.
To increase intensity levels the duration of exercise will be increased by two
minutes each time the exercise is repeated by subject. The exercise will be
repeated until the duration of exercise reaches 10 minutes.
These exercises have to be completed by each subject and no changes will be
made for either of them.
Name: Anushka Rahman
Grade: 9-B
~~Results Table~~
Subject #
Resting pulse
rate
1
80
1
80
1
80
1
80
1
80
1
80
1
Type of exercise
Duration of
exercise
Pulse rate
before exercise
Pulse rate after
exercise
1
80
108
2
80
132
3
80
144
4
80
152
5
80
160
Walking
1
80
108
80
Walking
2
80
108
1
80
Walking
3
80
112
1
80
Walking
4
80
124
1
80
Walking
5
80
128
2
96
1
96
160
2
96
2
96
200
2
96
3
96
240
2
96
4
96
260
2
96
5
96
280
2
96
Walking
1
96
100
2
96
Walking
2
96
108
2
96
3
96
112
2
96
Walking
4
96
125
2
96
Walking
5
96
126
Step-ups
Step-ups
Step-ups
Step-ups
Step-ups
Step-ups
Step-ups
Step-ups
Step-ups
Step-ups
Walking
Name: Anushka Rahman
Grade: 9-B
~~Data Processing~~
Comparison between Subject #1 & #2 in Step-ups
Pulse rate (per minute)
300
250
200
150
100
50
0
1
2
3
4
5
Duration Of Exercise
Subject #1
Subject #2
Comparison Between Subject #1 & #2 in Walking
140
Pulse Rate (per minute)
120
100
80
60
40
20
0
1
2
3
Duration Of Exercise
4
5
Subject #1
Subject #2
Name: Anushka Rahman
Grade: 9-B
~~Data Analysis~~
The first graph, illustrates the comparison between the pulse rate of subject #1
and subject #2, while they were doing step-ups. Subject #1 has a lower pulse rate
range then subject #2, and therefore, was not as tired out as subject #2. However,
the steady increase in pulse rate for both subjects is unmistakeable.
Mathematically speaking, subject #1’s pulse rate increased to 28 beats more then
her resting pulse rate, after the one minute exercise, then increased to 52 beats
more in the two minutes exercise, which is almost two times the rate of the first
minute. After 5 minutes of the exercise was over, the pulse of subject #1 was
double that of her resting pulse rate. For subject #2, the jumping pace of her
pulse rate was almost incredible. Her pulse rate increased by 64 beats then her
resting in the first minute, and it increased by 104 in the two minutes exercise,
then 144 beats in the three minutes exercise. The pulse rate sort of slowed down
to increasing to 164 in the four minutes exercise. So, for this particular exercise,
we can say that increasing intensity levels of exercise causes the pulse rate to
increase proportionally.
The second graph shows that even though the exercise is slow and less
exhausting then the first, the pulse rate steadily increases, and both subjects are
nearly neck-to-neck in pulse rates. Again, we can say that increasing intensity
levels of exercise causes the pulse rate to increase proportionally, and at the same
time, also proves that people react differently to different exercises.
~~Conclusion~~
We can see quite clearly in both graphs that the pulse rate increases
proportionally with the duration of each/both exercise(s). It is always important
to consider the intensity of the exercise a person/subject is doing. If the exercise
requires a lot of work, then the pulse rate will increase rapidly and accordingly.
If the exercise doesn’t take much effort, then the pulse rate will increase, but very
slowly and in small bouts. Both of these conclusions prove my predictions to be
true and concrete.
~~Explanation~~
The pulse rate increases when we do something that requires energy. We need
energy whenever we stress ourselves, or do something physically. When we
exercise, we require energy because we need to use muscles in a quick and
strenuous way. Our pulse rate increases accordingly. That is what I tried to
prove through this investigation.
Name: Anushka Rahman
Grade: 9-B
~~Evaluation Of My Procedure~~
What was good about the investigation and the method I used?
For this investigation, I have used a very simple and easy method, as most of the
statistical work was done for me. The graphs were all accurate, and that helped
me analyse the data represented. Ms Excel helped me in yet another way as it
gave me so many types of charts and graphs to choose from. The results table
clearly represented all the data, which was important, as I had to look at the data
that I collected, and analyse it later properly. The two subjects were really
cooperative, so it was easy to get the job done. Their physical efficiencies were
more or less the same, though stress was handled differently by each of them.
The choice of exercise was good, as I got to compare between not only what the
pulse rate increases in increasing intensity levels, but also the intensity levels of
the exercises itself. I was able to justify my predictions, and they were proved
through the investigation. To do this investigation, I used a number of tools to
help me out. I used Ms Word (for the writing), Ms. Excel (for the graphs) and a
calculator at most times. I have tried more often as not, to make all my points
and views clear, as that is very important.
What was bad about the investigation and the method I used?
During this investigation, I used only one method, which can add to the
unreliability of the results. I could have gotten more subjects or added more
exercises to increase comparison levels, and that could have made my results
even more reliable. The pulse rates that were taken may have been one more or
one less, as finding the pulse rate by hand can be unreliable, as opposed to
software specially designed to figure out the pulse rate.
What can I improve in my investigation?
To improve this report, I will have to use more methods to make my findings
more concrete. I could extend my report by adding more subjects and exercises. I
could maybe also use some software that could check our pulse rate as an
accurate measure. This would require some background researching, but that
could be used as justification as well.