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Heart Rate Investigation

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Introduction The heart rate of a human varies from 150 beats per minute in young children, to about 60 beats per minute in the aged, however I am going to investigate whether my heart rate increases or decreases during physical exercise and why it does this. Prediction From my general knowledge I predict that my respiration rate will increase as a result of physical exercise. To start with I predict that there will be a general increase, but as my body starts to work harder I think that the heart will have to increase to a faster rate. My heart will have to pump more quickly to get the oxygen to my muscles for my body to function correctly. Once I have completed the exercise I think that my heart rate will decrease back to my normal resting pulse rate. I have made these predictions because I believe the supply of oxygen to the muscles will decrease which therefore will make the heart rate push harder. ...read more.


The 2nd person I studied, his name is Kyle who is a 15-year-old male non-smoker, which does a lot of regular exercise. The 3rd person I studied, her name is Emma who is a 16-year-old female smoker, which does not do much exercise. I feel doing these different people will give me a variety of results. Safety Issues To make sure there is no injuries during the experiment you must: - * Insure you have warmed up the muscles properly * Have the correct footwear on * Have the correct clothing on * Do not over do you bodies limit * Make sure you warm your muscles down Results Keira's (Me) Time of exercise Pulse Rate (b.p.m.) 0 (resting) 30 seconds 1minute 1min 30secs 2 minutes 2min 30secs 3 minutes 3mins 30secs 4 minutes 4mins 30secs 5 minutes 74 89 101 114 156 179 196 205 214 222 235 Average 162 Kyle's Time of exercise Pulse Rate (b.p.m.) ...read more.


Evaluation In my personal opinion I thought my results was fairly ok but maybe a little too high to what they should have been. I did not find any difficulties in taking the pulse rate, it was just being able to keep count as it was going fast and difficult to make sure I didn't loose the pulse. You can't be sure that you do the same exercise every time as peoples styles of running may vary, also different people run at different paces and speed. To improve this situation it may be better to try running up and down the stairs so many times in a minute. I tried making my results more reliable by calculating the averages and using three different types of people. If I were to do it again I would try and use more age groups, a different exercise and a wider range of people, exercises and times, also to separate the men's results from the women's as they are different in size, weight and body fitness. GCSE Coursework Investigating Heart Rate Keira McAleese ...read more.

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