Pulse Investigation
Aim
My aim is to investigate one factor that affects pulse rate. I thought
about this for a while and read a few medical books before deciding
that I would investigate how physical activity can affect pulse rate
and the recovery rate
Prediction
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I predict increasing physical activity will make the pulse rate go
higher because exercise increases the rate at which energy is needed
from food. This increases the need for both food and oxygen in the
body. This is why your pulse rate increases with exercise. Your pulse
is just an indication of your heart rate as your arteries expand each
time the ventricles pump blood out of the heart. Your heart speeds up
to pump extra food and oxygen to the muscles. Also increasing the
physical activity will slow down the recovery rate because there is
more lactic acid, due to anaerobic exercise, to convert to Carbon
Dioxide and water and for this oxygen is needed which the heart has to
pump.
Plan
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I plan to conduct an experiment that will allow me to obtain results
in which I can analyse in a clear way. My experiment will take place
in a gymnasium in room temperature. I will need a jogging machine with
a stop watch
1. I will first take my resting pulse rate by placing the tips of my
index and middle fingers on the skin just above the artery. Once I
have found the pulse, I will count the beats for 15 seconds. Then I
will multiply the result by 4 that will give me my resting pulse rate
per minute.
2. Then I will go on the jogging machine and walk at a speed of 4 km/h
for 5 minutes. After that I will stop and then take my pulse rate
every minute until it comes back to my resting rate.
3. I will then do the same experiment with speeds of 8 km/h and 12
km/h, making sure that before every time I start my pulse rate is at
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Firstly we lay them on the back to get the resting heart rate and we
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one. I will use the same standard each time for judging when the X has
8. Repeat from step 4 twice more so you end up with three results for
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· I predict that my maximum heart rate will be around 205 BPM, this is
Pulse rates can vary from 60 up wards to about a 180 (this is the