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# Investigation Into The Effect Of Exercise On Pulse Rate

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Introduction

Investigation Into The Effect Of Exercise On Pulse Rate Aim Investigate the change in pulse rate after different durations of exercise. Fair Testing (variables) Independent variable: Duration of exercise Dependent variable: Change in pulse rate Controlled variables: -Type of exercise -Fitness of subject -Sex of subject -Mass of subject -Rate of exercise Predictions And Theory I think has the duration of exercise (independent variable) increases, the pulse rate (dependent variable) of the subject will increase considerably from the resting pulse rate. I think this because the body will need to deliver oxygen and glucose contained in the oxygenated blood more quickly. Apparatus * Stopwatch * Bench Method (Main Test) * Draw out a table to put your results in, it should have duration of exercise going down vertically and the measurement number and average going across the top horizontally, like this one: Pulse Rate (bpm) ...read more.

Middle

and keeping everything else constant (controlled variables). I kept the timing on the stopwatch as accurate has possible and did the step ups at a constant pace. Also, it was always my pulse rate that was measured keeping the subject the same. To get an accurate result has possible I repeated the experiment three times and then got an average of the 3 measurements that were taken. Safety * Step ups should be taken at a regular/constant pace to ensure you don't slip of the bench. * Shoes or trainers should be worn to protect feet. Observations I did find three results that seemed unusual, I think it was due to it been difficult to get an accurate pulse rate without using some type of electrical pulse rate measurer. ...read more.

Conclusion

However I think I could have made some changes to make the results more accurate, such has: * Using an electronic pulse rate monitor has it was sometimes heard to count the pulse rate especially after a long duration of exercise. This would also decrease the time between exercise. * Make sure I did the exercise at a steady rate. * Repeat the investigate after a long amount of time to ensure the body has gone down to its resting pulse rate. However, we did not get any results that seemed out of place. I think if we were to repeat the experiment again the results would not be exactly the same but if put on a graph the curve would be very similar. Mainly because of the inaccuracy of counting the pulse rate. I think if we could exercise for a longer duration we could prove that after a certain duration of exercise the pulse rate does level out. ...read more.

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