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Investigate how different amount of exercise affects the heart rate.

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AIM: To investigate how different amount of exercise affects the heart rate. INTRODUCTION From my previous knowledge I know that as soon as we begin to do the exercise, the rate of respiration in our muscles increase and more carbon dioxide is released into the blood. Therefore we start to breathe faster, when the level of carbon dioxide in the blood raises and as we breathe faster, our heart rate will increase automatically. If you do more exercises, more oxygen is needed to pump the blood through our body, so the heart has to pump very rapidly. And if we do exercises continuously for a long time, our muscles have to work hard with the little amount of oxygen therefore we start to respire anaerobic ally. For example while doing the exercise, under these conditions we cannot breathe faster enough, or pump our blood fast enough, to get sufficient oxygen to our muscles, so muscles respire anaerobic ally and lactic acid is produced. ...read more.


> I took my pulse rate again for 1 minute after I finished jogging on the spot for 30 seconds. > I continued doing the same exercise by increasing the timing, by 30 seconds each time, until I got enough evidence. > And while doing the exercise I made sure that I had some rest between each exercise until the heart rate became normal before starting to do the exercise again. > To make it a fair test, I repeated everything again and took the pulse rate. > Finally I recorded my results on a table. RESULTS Resting rate: 70 Length of exercise 1. Heart rate (BPM) Increase in rate 2. Heart rate (BPM) Increase in heart rate Average heart rate. 30 seconds 122 52 118 48 120 60 seconds 127 57 122 52 124.5 = 125 90 seconds 134 64 131 61 132.5 = 133 120 seconds 146 76 140 70 143 150 seconds 164 94 158 88 161 Length of exercise Average heart rate. ...read more.


I got almost the same results, only a small difference. And that is why I decided to take an average result. I can also say that I did not get any strange results and I can say this by looking at my graph. If I had more time to do this experiment, then I would have done it in two different conditions (e.g. morning and evening) to see if there was any difference in heart rate due to the different conditions. To make my conclusion more certain, I would also try to do a range of different exercises and compare to see if there was any affect in doing different exercises. I did my practical twice to get more accurate and reliable results. But if I repeat this experiment again then I would try to get a big range of different results. But this time I will use a "heart rate monitor" to make it more accurate and reliable. I can't exactly say that my results now are accurate because there are chances of human errors like for example I might have made a mistake while counting my pulse rate (loosing the counting). ...read more.

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