Submitted by: Submitted by ulrikee
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Category: Science and Technology
Date Submitted: 11/25/2010 07:55 AM
Heart Rate Experiment
Research question: What is the effect on the heart rate (measured in bmp with the VitalScanPlus) if a person walks up stairs (one step per second measured with a stop watch) to the 1st, 2nd, and 3rd floor (repeated 3 times for each floor with a 2 minutes break between the trials)?
Variables:
» Independent – distance (1st, 2nd and 3rd floor)
» Dependent – heart rate in bpm measured with the VitalScanPlus
» Controlled – speed of walking (1 step per second measured with a stop watch)
– it has to be the same person
– the same day
– same room
– 2 minutes breaks between the trial (so the heart rate can normalize)
– 3 trials for each floor
Control of Variables:
» Adjusting the independent variable: the person has to walk up the first floor 3 times, the second floor 3 times and the third floor 3 times.
» Measure the dependent variable: directly when the person reaches one f the 3 floors he/she has to turn on the VitalScanPlus to measure the heart rate in beats per minute.
» Control the controlled variables:
– The person has to make 1 step per second, which is measured with a stop watch. Another person walks next to him/her and tells her when to make the step.
– The whole experiment must be done on one day.
– The person always has to walk up the same stairs. He must not change the location.
– Between the trials there must be a 2 minutes break, so that the person’s heart rate has the possibility to normalize again.
– There must be 3 trials for each floor.
Materials: VitalScanPlus, stop watch
Method: The normal heart rate (the person did not do anything) is measured with the VitalScanPlus three times. In between there are 2 minutes breaks. Then the person walks up the first...