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What affect does exercise have on our pulse?

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Biology Coursework - What affect does exercise have on our pulse? Aim: To find out what affect exercise has on our pulse by doing either different types of exercise or the same exercise for different lengths of time. Prediction: I predict that the longer you exercise the higher your pulse will get to a certain point where it will become steady, creating a smooth curve on a graph. Equipment: * Stopwatch - to time when I exercise and when I take my pulse. * Area to exercise in / Treadmill - depending which is available. Method: For this test I will be jogging for a certain amount of time, taking my pulse for 15sec then jogging for the same time again without resting so the time builds up. This is how I will do my test: 1. Start the stopwatch and jog for 30sec. ...read more.


pulse, but if it is to cold it is hard to get warm enough and jog at the same time resulting in a higher pulse. Results: Time (min) Pulse (bpm) Test 1 Test 2 Test 3 Average 0 96 102 96 90 0.5 120 120 120 120 1 123 126 127 132 1.5 129 135 142 162 2 135 147 151 171 2.5 141 156 158 177 3 177 180 168 147 3.5 153 141 144 138 4 144 126 134 132 4.5 135 120 128 129 5 126 120 126 132 Analysis of results and graph: The results seem to be reliable and accurate as none are far from the general trend. The results I have obtained from my investigation partially support my prediction that the longer you exercise the higher your pulse to a point, but instead of continuing along a steady line after this they go back down. This can be seen clearly in the graph of time against pulse rate. ...read more.


Evaluation: I think my experiment went fairly well and it was a quite fair test. Things I would want to improve would be to: * Do all the results on the same day as this would affect my fitness and the temperature. * Have equipment to take my pulse continuously so I could keep jogging as 15sec many have been enough time for me to partially recover. * Have flat even ground to jog on as slopes and bumps could affect the speed at which I jog. * Have someone else timing me as it is hard to jog and look at a stopwatch accurately. * Take more results and repeat them more times. Overall I think my results are reliable as none of them are obviously anomalous. If accurate pulse measurement equipment could be obtained it would be possible to just jog for 5 minutes and take continuous results. This would create a much more accurate graph and results table. Connor Dunn 1 ...read more.

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