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An Investigation, to show how different exercises effect your pulse rate.

Extracts from this essay...

Introduction

An Investigation, to show how different exercises effect your pulse rate Introduction We all have a heart rate. You can measure your heart rate by taking your pulse, as this is a reflection of your heart rate. To take your pulse rate, you use your index and middle finger, together and place them on the under side of your jaw until you can feel a steady beat. This beat is blood being pumped around the body, which causes the arteries to expand and then contract. You count the number of times you can feel this for one minute. This is your pulse rate in beats per minute. This pulse rate can vary from 150 beats per minute in young children, to about 60 in the aged. To get your pulse rate to speed up, you can do many different things. You can exercise. This exercise can be done in many diverse ways; you could simply run on the spot for one minute, do star jumps for one minute, stride jumps, step-ups etc. Exercise gets your heart rate up because the faster you exercise, the harder your muscles work. This means that your muscles require more oxygen and glucose. This results in your heart having to work harder to pump blood around your body, which contains these essentials, to your muscles. The carbon dioxide and waste products are removed quicker. Your pulse rate can also be affected by many other factors and your pulse rate can affect your sensing system.

Middle

We will make sure that we don't eat before we exercise as this may affect our pulse rate, because our stomach muscle would be working to digest the food we had eaten and more blood would need to be pumped around to the stomach muscles faster. Here is a table to show the aspects we will change and the aspects we will keep the same; these will help to keep it a fair test. Same Change Time exercising for -1 min Exercises done Use same stop watch Person taking the pulse Take the pulse for same length Don't eat before exercising As you know, we will do 5 exercises. This will make sure that we will have enough data to draw a graph to show our results clearly. To make sure that we keep safe, we will wear trainers, so we don't injure ourselves. An adult will properly supervise us so if something bad does happen someone sensible will be there to deal with the problem. Results Here is a table to show all three sets of my results: Exercise Star jumps Running on the spot Step -ups Cycling Skipping Starting pulse rate (bpm) 96 108 80 114 114 96 92 78 84 144 150 90 84 Finishing pulse rate (bpm) 150 138 128 108 138 120 112 186 132 170 166 168 144 Change in pulse rate (bpm) 54 30 48 66 24 23 20 108 48 26 16 78 60 As you can see, not all the results for cycling are entered.

Conclusion

If I was going to do this experiment again, I think that I would maybe think again before using electrical or mechanical equipment as it is very difficult to be able to use it, this is because the equipment is not very safe, so you have to have an adult supervising you at all times. If a teacher is absent for some reason, and the rest of the class require supervision at the same time as you, then you cannot use this equipment. I would maybe choose exercise, which would be able to be done within a class situation safely. This would ensure that I can get all my results, but they may not be accurate as the machines keep the speed constant, which make the results very accurate. To get around this problem, you could have more time so that you can use the equipment when teachers were able to supervise you. To get more information, you could also do more different exercises, e.g. sit-ups and press-ups etc. There is also a different experiment you could do, you could do the same exercise, say running on the spot, and you could just change the time you run for each time and see if the longer you exercise the more your pulse rate increases or not. Over all, I feel that my experiment went very well and I enjoyed doing the investigation. Even though everything didn't go according to plan. By Hannah Ridley

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