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Determine the effect of exercise on my pulse rate and the rest of the body.

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Introduction

Aim: I have to determine the effect of exercise on my pulse rate and the rest of the body. Prediction: From my scientific knowledge, I predict that the pulse rate will increase as a result of exercise. I think that there will be a gradual increase to begin with, but as the body has to work harder I believe that the pulse rate will increase at a faster rate. When the exercise is complete I think that the heart rate will gradually decrease back to the resting pulse rate, but the time which it takes for pulse rate to return to normal will depend on how fit you are and the fitter you are, the shorter your recovery time. This is because I believe that the supply of Oxygen to the muscles will decrease which will push the pulse rate up. I also think that a lot of energy will be used up as the exercise takes place, thus resulting in a further increase. ...read more.

Middle

The exercise will have to be done where the temperature, wind, altitude etc are constant in order for it to be a fair test. I will make sure that I jog in an area where there are no dangerous objects around which could hurt or injure me in any way and where there is enough room for me to jog properly without having to jog in a small amount of space. I might also stretch my muscles before and after I start my jogging so that I do not pull any muscles. I will also wear trainers to protect my ankles and for extra comfort while jogging. Results: First attempt: Second attempt: Third attempt: Average: I noticed that as I increased the amount of exercise that I done, my pulse rate increased also. My pulse rate increased at a steady rate. Discussion My results show that when the amount of exercise is increased, the pulse rate is also increased. ...read more.

Conclusion

Substances from our food is oxidised to give carbon dioxide and water and also energy is transferred. The main substance that is oxidised is glucose. The overall equation for respiration is: C6H12O6 + 6O2 = 6CO2 + 6H2O + ATP Glucose + Oxygen = Carbon Dioxide + Water + Energy Evaluation Overall I think that my experiment produced fairly good results. I am not sure that my experiment was very accurate because I cannot be sure that I jogged at the same constant speed during the experiment. If I could improve on this experiment I would change the method of exercise I would use. For instance, if I were to use a running machine, it would produce accurate results because I would be able to ensure that the exercise remained at a constant speed throughout the experiment. Finally, an actual 'pulse-meter' might have helped the experiment to be more accurate. This is simply strapped round the chest and it measures the pulse rate during the exercise. I believe that this would produce a more accurate pulse rate instead of having to take it myself. ...read more.

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