Experiment: The effect of exercise on the pulse rate.
Name: _____________________________________
Date: ________________
Grade & class: 9 E____
/20
In this experiment you will investigate how exercise affects our pulse rates. Work in groups of two
as allocated by your teacher.
Apparatus: Timing devise (cell phone or tablet)
Method: Each person must measure their heart rate (pulse) at the start of the experiment. The
other person must record results. This is your baseline or resting heart rate. See the
diagram below on how to measure your pulse. Time for 15 seconds and multiply by 4
to get beats per minute.
 One person must run on the spot for 1 min.
 Measure and record the pulse rate directly after exercise then again after 1, 2, 3, 4 minutes.
 Fill the results in on the table below.
 Repeat with the other learner doing the exercise.
 Answer the questions while you are waiting to take your next reading.
Results:
Heading: ___________________________________________________________
1
(2)
Time (min)
Person 1 = Pulse in beats
per min
Person 2 = Pulse in beats
per min
-1 min before
exercise
0 min directly after
exercise
1 min after exercise
2 min after exercise
3 min after exercise
4 min after exercise
(3)
Graph:
Plot the results on a line graph below. Use a different colour for each person.
Heading: _______________________________________________________________
_______________________________________________________________________
(6)
2
Answer the following questions below:
1.
2.
Identify each of the following:
a)
the independent variable. ________________________________________
(1)
b)
the dependent variable. _________________________________________
(1)
Name one variable that you have controlled and state how you have controlled it.
__________________________________________________________________
__________________________________________________________________
3.
(2)
Give a hypothesis for this experiment. ____________________________________
__________________________________________________________________
__________________________________________________________________
4.
(2)
State the conclusion of this experiment. __________________________________
__________________________________________________________________
(3)
TOTAL: 20
3