• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Investigation Question: How does Body Mass Index affect heart rate with respect to exercise?

Extracts from this document...


BMI and Heart Rate Investigation Question: How does Body Mass Index affect heart rate with respect to exercise? Null Hypothesis: Body Mass Index has no affect on heart rate with respect to exercise Alternate Hypothesis: If the Body Mass Index increases, then there will be a higher increase in heart rate with respect to exercise. Independent Variable: Body Mass Index (BMI) Dependent Variable: Percent increase of heart rate Constants: temperature, time of jumping jacks, BMI chart, time to count heart rate Control: Resting heart rate values Materials: stopwatch, 20 subjects, open space, calculator, Body Mass Index chart, Procedure: 1) Have subject derive their BMI with respect to their height and weight on the provided chart. Record value 2) Take subject's resting heart rate by counting their pulse for 10 seconds, and then multiplying by 6 for the 60 seconds in a minute. Record value 3) Using a stopwatch, have the subject do jumping jacks for exactly one minute 4) After jumping jacks, immediately take subject's heart rate by counting pulse for exactly one minute 5) ...read more.


Before this experiment, we predicted that the higher the BMI, the higher the percent increase from resting heart rate to heart rate after exercise. After we finished collecting raw data from 20 subjects, we processed this data and calculated the percent increase of heart rate, and our results showed that there is no relationship between Body Mass Index and heart rate with respect to exercise. No statistical analysis was necessary due to the lack of correlation between the two variables. According to outside sources, there does in fact exist a correlation between BMI's and heart rates; higher BMI's signify unhealthiness and/or obesity, so the higher BMI's should have a higher percent increase of heart rate after exercise. This proves that there were many shortcomings in our lab, as outside research indicates that our results should have matched our alternate hypothesis. Evaluation/ Improvements: The biggest reason this experiment failed to yield accurate/expected results was due to the fact that there were too many external variables that we could not control. ...read more.


Other measurements, including the height and weight needed to acquire Body Mass Index numbers, were also estimated or exaggerated by some subjects. This threw off our BMI calculations, which in turn throws off our analysis of the correlation. If we were to redo this experiment, we would attempt to control all of these external factors that skewed our data. We would inform our subjects of the experiment beforehand as to minimize the number of variables that could affect heart rate (i.e. consumption of caffeine, uniform inappropriate clothing, etc.). This will give us a more normal population to test. The method of calculating BMI would also be altered to a more accurate method by providing on the spot scales to measure height and weight. We should also alter the method for counting heart rates to a more uniform method. This could be done through the usage of heart monitors, which will provide more accurate heart rate calculations. Through better control of the external environment and outside forces, and the setting of more uniform guidelines for each subject would minimize abnormalities and inaccuracies in our data collection, which will give us better, more accurate results. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Biology essays

  1. Marked by a teacher

    Neurology and Behaviour. Focus question: Is there an increase in the perception and ...

    5 star(s)

    1 1 3 1 5 1 2 1 1 1 2 1 1 4 2 6 1 1 1 1 1 3 3 3 2 2 7 3 2 2 3 3 4 1 4 2 4 8 1 1 1 2 2 2 1 2 5 3 9 1

  2. Research Question: Does the duration of exercise have an increased effect on a persons ...

    The error bars appearing on the graph do not overlap between increments one and two but do overlap quite a bit between increments two and three. This shows us that while the duration of exercise does increase heart rate as shown in comparing increments one and two, its effect on

  1. biology extended essay - How different diets: vegetarian, vegan and a meat centered diet ...

    ''Lacto'' is the Latin word for milk. Lacto-ovo vegetarian diet A lacto-ovo vegetarian diet is a diet that involves the consumption of eggs and diary products such as cheese, yogurt, and butter. It does not however allow the consumption of meat of any kind which includes pork, beef, chicken etc..

  2. Ecology Open Investigation Does the geographic location affect the biotic and abiotic ...

    The sample was collected just at the edge of the swamp - The front of the Horiba was submerged in the water and the apparatus was shaken. The first appeared reading was then recorded - The organisms were collected 2/3 metres from surface land - Before sample was taken, the

  1. Bacteria and Cleanliness. Question: Among the insides of a toilet, dishcloth, sink, and a ...

    in the sink data, but it should not be considered an outlier because variability was intended. In order to have a complete representation of the item, I needed to swab different areas for the item I was testing. The great variability in the sink simply tells me that bacteria seem to congregate toward a particular area of a sink.

  2. Transpiration Investigation

    Variation due to different number of leaves, etc. The same cutting of cherry laurel will be used each time Variation of light levels over trial. It was found that the output of the lamp varied, particularly in the first few minutes after being turned on The lamp is allowed five minutes to come up to temperature.

  1. How Does Exercises And Tea Affect Heart Rate And Blood Pressure rate as ...

    except for the Stopwatch which had an uncertainty of �0.01 sec and the percentage of difference as it was � 0.1% , also their was a limitation that during taking the measurements after finishing use the actual experiment I was walking and going down stairs, which may has also affected

  2. An investigation on the changes in tidal volume and vital capacity of lungs before ...

    Measurements of tidal volume and vital capacity after exercise. Participant Tidal volume /cm3 (100) Vital capacity /cm3 (100) 1 1100 3000 2 3400 5200 3 3100 5100 4 2100 4800 5 2500 5200 6 1300 3700 7 2500 3200 8 3100 3600 9 2000 5000 10 1600 1200 The standard deviation of the tidal volume and vital capacity after

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work