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# Heart Rate Investigation!

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Introduction

Heart Rate Investigation! Aim: To discover if there is any link between the amount of exercise taken to the rise of a persons heart rate. Prediction: I predict that as the amount of time you exercise goes up so will your heart rate. But after a certain amount of time your heart rates rate of increase will slow down and eventually level out and stay the same, until you slow down or stop exercising. This is because the more you exercise the more energy your body will need. Oxygen is pumped around the body in the blood, the heart pumps the blood around the body so you have a higher heart rate while or shortly after exercise as the heart is working harder pumping the blood around the body. Equation for respiration: C16 H12 O6 + O2 CO2 + H2O Glucose Oxygen + Energy Apparatus: 1 Step block 1 Stopwatch 1 Pair of trainers Diagram: Step up and then step down. Trainers Step block Method: * Start by setting up all the apparatus and put the trainers on and tie securely. * Take your resting heart rate. ...read more.

Middle

As we are doing the whole experiment on the same day this will not affect the results I get. Fair Test: * I will keep it a fair test by changing the variable I have chosen and keeping all the other variables the same. * I will let the heart rate return to its resting rate before continuing with the next session of step-ups, as if the hear rate is higher to begin with it will rise higher and give an inaccurate result. Results: This table of results is from when Laura did the experiment. Time spent exercising (mins) 1st results Heart rate (B.P.M) 2nd results Heart rate (B.P.M) 3rd results heart rate (B.P.M) Average of all 3 results. (B.P.M) 0 64 --- --- 64 1 92 93 93 93 2 144 140 142 142 3 168 152 158 155 4 156 161 157 158 5 160 165 164 163 This table of results is from when Rebecca did the experiment. Time spent exercising (mins) 1st results Heart rate (B.P.M) 2nd results Heart rate (B.P.M) 3rd results heart rate (B.P.M) Average of all 3 results. ...read more.

Conclusion

The method I chose to use was quite suitable as the results were easily to obtain. If I were to repeat this experiment again I would make a few changes to improve the reliability of the results. I would use a running machine instead of doing step ups, as you can control the speed the person is running on a running machine but its harder to control the speed some one is doing step ups. I would also use a heart rate monitor watch, as this would accurately take the persons heart rate. When you take it by feeling the pulse you can loose count and then the result would be inaccurate. I could further this experiment by extending the length of the periods of exercise. For example you could exercise for 1,2,3,4,5,6,7,8,9 and 10 minutes, this would give you a wider range of results and then you might be able to see if the heart rate eventually levels out. You could also change the variables that you keep the same and change. For example you could keep the length of the period of exercise the same but change the intensity of the exercise. Then you could see if the intensity of the exercise affects the rise of the heart rate. 1 Caroline Fletcher 10:02 ...read more.

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