The Effect of Exercise on the Heart Rate
- Length: 998 words (2.9 double-spaced pages)
- Rating: Excellent
the aim of this experiment is to find out what the effects of exercise
are on the heart rate. And to record these results in various formats.
* Type of exercise
* Duration of exercise
* Intensity of exercise
* Stage of respiration
* Age of the person exercising
* level of fitness and recovery rate
* gender of candidate
* amount of recovery time
KEY VARIABLE: -
The variable that I will be using is the duration of exercise, this is
because it is easy to measure against any candidate and get a correct
accurate reading from it. If I chose the type of exercise I will get
readings that might not be correct because some types of exercises are
common to people and probably not have an effect on heart rate e.g.
walking 30 seconds . When we are selective with the type of candidate,
we cant just look at one variable if we want it to be a fair test
because if we just look at age, all the other variables should be kept
equal, it is not possible for two people to be of the same or
identical physical fitness and therefore some exercise might not have
an effect on these people, giving a false impression of heart rate
when a very fit person may take a long time to work into hard pumping.
To combat this in my experiment I will do the experiment on myself,
timing the exercise at four different duration's.
· I predict that my heart rate will increase during exercise because
my muscle being used will need a higher supply of oxygen, which is
carried in the blood, therefore my heart should pump faster to deliver
for the demand of oxygen.
· I predict that my maximum heart rate will be around 205 BPM, this is
because to work out maximum heart rate you can roughly calculate 220,
minus your age.
· I predict that I will only reach my maximum heart rate if I exercise
intensively or after the one minute mark of exercising. This is
because I am used to exercising and I think that my body needs the
higher oxygen demand after I have got well into physical activity.
· I think that if I do an anaerobic exercise, I will reach my maximum
heart rate much quicker because I will be in oxygen dept after a short
burst of this intense type of exercise and my blood will be pumped
quicker around my body to supply the muscles with the oxygen they have
been starved of and to start the removal of lactic acid.
· I predict that my heart rate will stay constant after one minute of
exercise and will return to normal within one or two minutes, when I
check my pulse it will start to recover so when I exercise I will take
it for 10 times it by 6.
* Collect equipment
* Check basal/ resting heart rate
* Perform the step-ups on a 24cm high step/stool for 30 seconds
* Then stop and check the heart rate for 10 seconds
* multiply this result by 6
* Time how long it takes to recover to basal heart rate after a rest
of 30 seconds, 60 seconds 90 seconds and 120 seconds. Or until basal
heart rate returns.
* perform this routine after 1 minute of step-ups, 90 seconds and 120
* record these results In the data capture sheet.
SAFTEY AND FAIR TEST:-
To make sure we are not of risk from injury we should be warm before
we start, it is essential to do a range of mobility exercises before
the activity because depending on the intensity of movement, you can
damage connective tissues and muscles. You must also wear the correct
clothing for the activity i.e. trainers and freely movable clothes to
prevent the chance of getting skin rashes and instability. Another
safety check should be the surface that you perform the activity on
because an uneven or debris littered surface can cause you to trip or
sprain joints. The fair test elements to look at in my experiment is
to try to perform the step-ups at the same rate, because different
intensity of exercise can change the effect on heart rate as well,
also the intensity can change the respiration stage you perform in so
results can be skewed. We must also make sure the equipment is the
same in each test i.e. using the same height of step and timing
equipment and boundaries
*STARTING HEART RATE 66 BPM. When timed for 10 seconds multiplied by
six, 69 BPM when timed for one minute.
pulse after exercise BPM
after 30s rest
after 60s rest
after 90s rest
after 120s rest
[IMAGE][IMAGE]after 150s rest
after 180s rest
after 210s rest
[IMAGE][IMAGE]after 240s rest
My preliminary experiment was to see what the effect would be on the
heart rate after jogging different distances but it was inconvenient
at the time I was doing the experiment and I would not be able to keep
the same pace for all the distances and recovery will be an issue,
therefore the experiment would not of been very fair.
The results that I have gathered from my experiment I have put into
graph form. From my results I have found out that the more I exercise
the longer I exercise the longer it takes for my pulse to return to
normal, I think that I did not reach my potential maximum heart rate
because the exercised was not strenuous enough for my body. I also
discovered that when taking my pulse it takes a few seconds for the
strong pulse to get back to the surface. I found out that this is
because the blood is feeding the muscles oxygen at first then the body
wants to lose heat from the body created my movement as well so the
blood vessels dilate.
The percentage increase for the 30 seconds of step ups was 63.6%, for
sixty seconds of exercise it was a 72% increase and for 90 seconds it
was a full 100% increase. For the 120 seconds of exercise it was a
127% increase. This means that the heart can double its basal heart
rate during exercise and even has the ability to triple its output as
The heart rate also has slight irregularities because when I timed it
for a whole minute it was different than timing it for ten seconds and
multiplying it by six.
I think that my heart rate did not go above what it did because as I
predicted, it will only do that when I respire anerobically or for a
very long time, this is because my body did not need loads of oxygen
or more than it can supply. My heart rate went back to normal after
one minute after the first exercise as I predicted then it took longer
to recover as the amount of exercise increased.
CONCLUSION/ EVALUATION: -
I have found out that when I exercise my heart rate increases,
sometimes my heart went over twice its normal output, I also found out
that step-ups don't make me use the maximum heart rate. I think that
my readings were quite accurate because of the way I measured them the
time was easy to get an accurate reading on a chronograph stop watch
and I did not have time to recover the way I took my pulse do had a
reading of exercise pulse. However the way it could have been more
accurate is to use an electocardiogram.