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To find out whether ' does exercising for different amounts of time creates a significant difference between the pulse rates of different people.'

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INVESTIGATION TO SEE HOW EXERCISE AFFECTS THE PULSE RATE AIM: To find out whether ' does exercising for different amounts of time creates a significant difference between the pulse rates of different people.' INTRODUCTION: The heart pumps blood all around the body to supply the many cells with oxygen, to keep us alive. Our heart has a double circulation, one going to the lungs, the other to the body. There are complex systems of arteries, veins and capillaries, these are all needed to pump blood to all the organs and cells. The cells in our body need oxygen and glucose to live, and need to dispose of carbon dioxide, the blood is used to transport these and so is very important in our body. The heart is used to pump the blood around the body and so is vital in the life of a human. By exercising the heart, like any muscle, it can be trained and strengthened. When a heart is trained it is a lot better for the subject involved. Firstly because it is healthier and so the person is fitter, and secondly because it means more blood can be pumped per beat, supplying all the cells with oxygen. A substance called haemoglobin carries oxygen, this is a bright red colour and is poisoned by carbon monoxide, and this is why smokers are unfit, because tobacco smoke contains carbon monoxide. The heart is a vital organ in the body. The heart pumps blood around the body continually, from the moment of birth till the death of a person. The pumping of blood is represented by the pulse rate, or beating of the heart. This pulse rate can be felt more strongly where the arteries of the body run close to the surface of the body, such as the carotid artery, in the neck, and the radial artery in the wrist. The beating of the heart is actually the ejection of blood from the left ventricle to the general circulation of the body. ...read more.


in this investigation. My body mass index : Mass 70 (Kg.) Height 2 1.832 (metres) = 20.9 Kgm2 I will make sure that people in my experiment have the same body mass index (roughly) as me. This will mean that their body build will be roughly the same and so their fitness level about the same. * Pulse rate (B.P.M.): I will make sure the people doing my experiment all have roughly the same resting pulse rate as me (64 beats per minute). They will have between 5 on either side. i.e. between 59 and 69 B.P.M. This will ensure that all my results are as accurate as can be. * Type of exercise: I will need to ensure that the type of exercise carried out is the same, as if it was easier for some, and harder for others, it would change the results as different people would be trying at different levels. Thus, the exercise must be the same, but the timing different. * Time of day: The time of day when this experiment will be taken is very important as this will affect the capacity of the person exercising. I fit is taken after a big meal they will not be able to perform as well as if they had had nothing to eat for a few hours and left time for their food to be digested. Therefore I need to have a set time of day to test this experiment and a limit to eating before it. The time of day will be 15:00 hours and the person will not be able to have eaten ANYTHING for the past 2 hours. This means that every person who takes part in the experiment is the same SUMMARY OF VARIABLES: * The things staying the same in my experiment are: Sex MALE Age 15 YEARS Weight/Mass index 20.9 Kgm2 Pulse rate (B.P.M.) ...read more.


They will each do the exercise 5 times, to get a reliable result, they will do one amount of exercise per week (schooldays) i.e. WEEK 1) MON - 2mins ex. WEEK 2) MON - 4mins ex. TUE - 2mins ex. TUE - 4mins ex. WED - 2mins ex. WED - 4mins ex. THUR - 2mins ex. THUR - 4mins ex. FRI - 2mins ex. FRI - 4mins ex. And so on... This would take 10 weeks to complete. I will then average the pulse rate so I can use that as my results. HOW MY RESULTS WILL BE ANALYSED: I will need a recorder to write down all the results in this experiment as well as the pulse measurer. When all my results are written down I will average them in a table and check and point out any anomalous results. I will then plot a graph of my results and take reading from the graph to prove my hypothesis correct. I will achieve this by calculating the % increase of pulse rate and how long it took for this increase to occur. I will then compare these results to the information I have about fitness and pulse rate and see if they are similar and match up. If they do then I will have just clarified that my results are accurate but if they do not match up then I will have to find a reason for it and express ideas as to why the data was not correct. For example; 'Could it have been the participants, did they not work hard enough?' 'Was it the pulse measurer?' 'Was it the type of exercise, did they not work to the same level?' 'Were the resting pulse rates taken wrongly?' 'Was the apparatus not functioning correctly?' These are all questions I will need to ask if my results do not match up with my knowledge of pulse rate. I will then make a conclusion of my results and evaluate my investigation. 4TH DECEMBER EXERCISE INVESTIGATION JAMES LAGDEN PAGE 1 ...read more.

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