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The Effects of Exercise on the Body

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The Effects of Exercise on the Body Aim: To discover how exercise affects the human body, by measuring changes in heart rate and breathing rate. Prediction: I predict that when I exercise my pulse rate and my breathing rate will increase. This will happen because my muscles, which I am using to exercise, must contract to let me move. In order to contract they need energy. Cells in the human body produce energy through a process called respiration: Glucose + Oxygen = Carbon Dioxide + Water + Energy C6H12O6 + 6O2 = 6CO2 + 6H2O + Energy The glucose is broken down in our tissues into Adenosine Tri-Phosphate (ATP). ATP provides energy for processes such as muscle contraction (the process needed for exercise). The glucose and oxygen necessary for respiration are transported to the cells through the blood stream. The heart muscles contract to pump the blood around the body to the cells, providing the substances needed for respiration. When you exercise the muscle cells (which muscles are made of) need to contract more than usual, requiring more energy. To produce more energy the cells need more oxygen and glucose than they would usually receive. In order to supply this the heart muscles contract faster. ...read more.


Jog 2, 3, 4, 5, 6, 7, 8, 9 and 10 lengths, recording pulse and number of breaths per minute after each period of jogging. 6. Repeat each number of lengths at least 3 (preferably 5 or more) times. In order to make the experiment safe you need to ensure that after jogging your pulse and breath rate have returned to normal before you jog again. It is also advisable to wear clothing suitable for exercise e.g. shorts/tracksuit. You need to ensure the area you are jogging through is clear and that the surface is safe to jog on e.g. grass or concrete. To make the test fair you need to ensure that your pace during jogging remains the same, so that the exercise is the same throughout. Your breathing and pulse rates must have returned to normal before taking a new result, otherwise the result will be unfair, as your pulse will already be higher than normal. The results must all be taken at the same place too, so that the surface remains the same, so you are jogging along the same route each time. Conclusion: As can be seen on the graphs, after exercise my pulse rate and my breathing rate increased. My pulse rate went up quite quickly at first, before slowly levelling off. ...read more.


The procedure was relatively accurate and allowed plenty of opportunity for repeats. The procedure could have been improved if lengths with replaced with a continuous circuit, as more energy is required for turning and you need to slow down to turn. The main problem with the procedure was that there was no foolproof way of keeping the pace constant. This could perhaps have been rectified through the use of an electronic treadmill. On an electronic treadmill you set a speed and your pace must remain the same other wise you run out of space to jog on. The evidence is firm enough to support my conclusion, although more evidence is needed to confirm it. The evidence is also reliable as a reasonable amount of repeats have been conducted. To provide firmer results, more repats should be performed over a wider range, preferably using more than one person (I used only myself in this experiment). Two anomalous results were recorded. The first was a pulse rate of 123 after having jogged 310 metres (the other results recorded were 169, 171, 174 and 170).This anomaly was the result of losing count during the reading. The second anomaly was 40 breaths after jogging 620 metres (the other results were 57, 54, 59 and 52). This anomaly was a result of accidentally stopping the count before one minute had passed. ...read more.

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