# How Exercise Affects Your Heart Rate

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How Exercise Affects Your Heart Rate

The heart rate of a human varies from 150 beats per minute in young

children, to about 60 in the aged. However, I am not interested in the

differing rates between the aged and young, I intend to investigate

whether doing exercise may alter the rate or ones heart rate

considerably.

Variables:

Things that we could change in the experiment that could change the

heart rate are:

* Type of exercise

* Speed of exercise

* Distance travelled during exercise

* Time for exercise

* The time I wait before I take my heart rate after an exercise

In my investigation the…

…independent variable is the type of exercise, speed of exercise and

time for exercise.

…the dependant variable is the number of heart beats in a minute

…the control variables are the time I wait before I take my heart rate

after an exercise and the distance travelled during exercise.

Independent

variables.

I will vary the type of exercise between walking, jogging and running

so I’m basically just going to be changing the speed and when speed is

changed the time taken to travel a certain distance naturally changes

as well.

Dependent

Variables.

I will count my heart beat straight after an exercise for one minute.

I will know when time has reached 1 minute because I will use an

electronic stopwatch.

Cont...

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If I were doing this experiment again I would have to look closely at

the method of exercise I used. I think that exercising on a piece of

equipment like a running machine would produce more accurate results

because I would be able to guarantee that the exercise remained

constant throughout this experiment.

Finally, an actual ‘pulse-meter’ might have helped the experiment to

be more accurate. This is simply strapped round the chest of the

exercise and it measures your current heart rate. I believe that this

would produce a more accurate heart rate.

If I were to extend my experiment I could try different exercises such

as star jumps and step ups at different paces to see if this has

similar results.