The effect of exercise on the heart rate.

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THE EFFECT OF EXERCISE ON THE HEART RATE

Plan and Prediction:

I will conduct an experiment accurately and suitably, which will give evidence to prove my prediction correct.

Firstly I will carry out preliminary tests, which will tell me which exercise will raise the heart rate more and give the best results. The exercises I will test are: step-ups, skipping, sit-ups and jogging on the spot. To test these different exercises I will time each of the exercises for thirty seconds then measure the heart rate. I will repeat these preliminary tests to ensure the results will be fair.

Unit of exercise

Heart rate after 30 seconds of exercise (bpm)

2

3

AVERAGE

Jogging

16

20

24

20

Sit-ups

88

00

12

00

Skipping

36

12

96

15

Step-ups

84

92

80

85

These preliminary tests showed that jogging increased the heart rate the most and as long as it is kept at a constant pace the results should be accurate. This is the exercise I have chosen to do for the experiment.

I will measure the resting heart rate of the person exercising by counting the number of beats per minute (bpm) in fifteen seconds and multiplying it by four. I will then take the bpm after the person has done thirty seconds of exercise, then again after forty and so on adding an amount of ten seconds each time up to ninety seconds.

I will display the information I get clearly on a results table and on a graph showing the line of best fit.

I must make sure that the experiment is a fair test in order to produce precise and reliable evidence for my prediction. I will ensure this by repeating the experiment so that from all three experiments I will find an average. I will also make it a fair test by measuring the time and bpm accurately and that the person exercising keeps constantly at the same pace. To allow the measurements of heart rate to be accurate I will need to let the person exercising to rest after each lot of exercise to allow their heart rate to return to resting. As well as this, the experiment needs to be a safe test. I will make sure it is safe by checking the person exercising is wearing appropriate clothing and footwear, that they are exercising on even ground and they have warmed up and stretched.
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I predict that the heart rate will increase and the more exercise the person does the higher their heart rate. I know that the heart pumps blood around the body. As the body exercises the demand for glucose and oxygen, that respire and produce energy, increases. Therefore the heart rate will increase the longer the person exercises to meet this demand.

The heart rate is the rate at which the heart pumps blood around the body. It can be measured by a pulse, which can be taken from a main artery (on the wrist, neck or groin. ...

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