The Effect of Exercise on Heart Rate.

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The Effect of Exercise on Heart Rate

I am investigating the effect of exercise on heart rate. In this investigation we will be doing different intensities of the same exercise to see what the difference is.

The exercise will be to run length of a tennis court. We will run it two times, four times, six times and eight times each.

In this investigation I will use a heart rate monitor to measure precisely peoples heart rate after the exercise. I will get the teacher to check my experiment to make sure everything is safe e.g. if people are in any danger when they are doing the experiment.

I will make it a fair test by repeating the exercises twice and averaging it. We will get equal rests, to make sure our heart rates are down to normal, in between each run. I will try and do the experiment and the repeat readings in the same temperature because if one of the experiments was in a hotter climate the heart rate would be quicker and that would be unfair.

I will start the experiment by taking the subjects resting heart rate. Then we will take it in turns to run, starting with the shortest distance first, as we only have one heart rate monitor. I will record their heart rate straight after they finish the exercise. After every one has done the easiest, we will take the resting heart rate again to check that it is down, and then take it in turns to do the next exercise. Then I will take their heart rate again, straight after they finish. I will do this same thing two more times, the only difference being the different intensities of exercise.

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I have taken some preliminary results to see if the exercise would work.

The preliminary work showed that the exercise would work and helped me to work out a prediction. I predict the harder the subject exercises, the higher the subjects heart rate would be. The blood has to be pumped round the body quicker by the heart. There are several reasons why this happens; before and during the early stages of exercise the sympathetic nervous system is alerted and adrenaline is secreted in to the bloodstream. Triggered by impulses from the brain before exercise, the heart beats faster and ...

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