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The aim of conducting this experiment is to know the effect of exercise on pulse rate by carrying out few exercises.

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Investigating Pulse Rate Aim: The aim of conducting this experiment is to know the effect of exercise on pulse rate by carrying out few exercises. Introduction When exercising or competing in sports, the body undertakes a number of changes. We breathe in heavier and faster, therefore our heart beats faster and our muscles stretch and therefore we sweat. These are all normal responses towards exercises, whether we work out regularly or only once in a while. To be frank, any type of exercise utilizes the help of the muscles. For example, running, swimming, weightlifting all uses different muscle groups to generate motion. In running and swimming, muscles are working to accelerate the body and keep it moving. In other words, exercise means muscle activity. In strenuous exercises, almost every system of the body either focuses its efforts on helping the muscles do their work effectively or it shuts down. For example, our heart beats faster during strenuous exercise so that it can pump blood to the muscles, and our stomach shuts down during strenuous exercise so that it does not waste energy that the muscles can use. When we carry out exercises, our muscles act like Electric Motors. Our muscles take in a source of energy and use it to generate force. An electric motor uses electricity to supply its energy. ...read more.


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. Prediction From previous scientific knowledge, I predict that while carrying out the exercises, the body's temperature, breathing rate and the heart rate will increase. I predict this because when muscles are in use, they produce heat. It is this heat that affects the body's temperature. The body will also try to keep the original heat and will sweat to cool the body down. Muscles need oxygen and glucose to work properly. The formula for respiration tells us that glucose and oxygen are taken in and energy and carbon dioxide are given out. The muscles will need more oxygen and glucose as they work harder, therefore the breathing rate should rise to allow a bigger intake of the two. For this now larger intake the heart must pump this oxygen and glucose, situated in the blood, to the muscle cells more rapidly. This means that the heart rate will increase. The fitter the body, the slower the heart rate and breathing rate will increase. Shown below is cardiovascular system, where the blood travels to and from which part. ...read more.


Walking 73 Jogging 142 Sprinting 272 Star Jumps 160 Final Results Exercise Activity Mean Average (in Bpm) Stationary Average Rise in Heart Rate (in Bpm) Walking 72 69.50 Jogging 144 69.50 Sprinting 274 69.50 Star Jumps 158 69.50 Conclusion My results agree with my prediction which I had guessed before carrying out the experiment. As I had said in my prediction, as I carry out more exercises my pulse rate increases. From my results too, I can see that, the higher the blood and the oxygen were being pumped faster around my body. Evaluation I believe that my experiment was successful and I achieved the results that I had desired. I think I could have made my experiment more accurate and well accomplished by employing people in my group. Overall my results were accurate as I checked them from the people of the other group. I think I had used accurate equipment and there weren't any strange results I achieved. While conducting my experiment I think there weren't any design error but there could have been some human and equipment errors such as: * While I was measuring my pulse rate, I think I had not measured it properly as I was not able to get the Pulse Stick 2 to zero. But at the end I did make it to zero even though, I can't remember so! * Lastly, I think I measured one of the resting heart rate incorrectly which would have made my experiment inaccurate. ...read more.

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