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How does strenuous exercise affect your pulse rate and breathing?

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GCSE Science Coursework My aim for the coursework is to do 12 minute running to see my pulse rate and also breathing rate. I will be checking how the exercise affects your pulse rate and breathing. After each exercise I will check how long it takes to recover. For this investigation I would do exercises to get more accurate results. I know my practical is safe because I would not do things that would affect people and also I would not do dangerous activities. Before I do the exercise I must check there is nothing in front of me e.g.: glass and also to be careful by stretching my muscles which would affect the exercise. I would need to use a stopwatch to check my pulse rate and also a pen and paper to write down my pulse rate. I will make my practical a fair test by testing the pulse rate at a certain amount of same time on exercises and also to make sure I would do it in the same place e.g.: park will keep all these things the same by checking my pulse rate at the same time after each exercise. I would also check my pulse rate at a certain time for each exercise and also to try and do it in the same place. ...read more.


After exercises the heart will take a while to return back to its resting rate. In this time the oxygen debt is paid back so that any lactic acid is oxidized. Our body contains plasma, which carries just about everything around the body, but most importantly for respiration oxygen carrying red blood cells. When we start exercising our heart, beats faster as we do more exercise to get the oxygen and glucose to the muscles cells where it is needed so that respiration can take place. We then need to breath at a more rapid rate to provide more oxygen so that it can be absorbed into the blood stream and carried to where it is needed. This is how respiration is linked to pulse rate. Athletes spend a great deal of time training. It allows their body to adapt its basic response to exercise and to improve athletic performance. Training can: * Make our muscles perform better. * Improve the efficiency of oxygen delivery to the working muscles. * Get the athlete adapted to the competition environment. From the pervious scientific knowledge I have predicted that while carrying out the exercises the body's temperature, breathing rate and the heart rate will increase. I predict this because I predict this because when muscles are in use they produce heat. ...read more.


The anomalous results in my investigation were all the results I done was what I expected. I recovered quickly because I am fit which shows my heart is healthy. The problem with the method or plan was there was no problem only if I had used a stethoscope it would be better for the exercise and accuracy. I would also see when the pulse rate increases. If I did the investigation again I would make it better by doing the exercise because I am fit. I would use a stethoscope because t would be easier and I will know what is happening and safe. Evaluation: I think my results are quite accurate although we have an anomalous result for our 12-minute exercise, which we marked on the graph. You can see they are quite accurate by looking at an bar chart and also scatter diagram graph this is another reason that we knew that one of the results was anomalous. If I was to do this investigation again I would gather more results as it would lead to a better average as was proven with our anomalous result which brought the average down so did not give us as accurate results as I would of hoped but they still showed us what needed to be shown. Overall I am happy with the way this investigation went, as my Hypothesis was correct. ...read more.

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