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

Physiology of Exercise

Extracts from this document...

Introduction

Design Problem Statement: The purpose of this lab is to examine heart rate in response to caffeine consumption. Hypothesis: * Null hypothesis: There is no correlation between heart rate and caffeine. * Alternate hypothesis: There is a correlation between heart rate and caffeine. Hypothesis Explanation: Caffeine acts as a natural stimulant that increases activity, and certainly heart rate. Heart rate is higher in the first 30 minutes because the stimulant will eventually pacify. Caffeine will stimulate the central nervous system by blocking adenosine, a neurotransmitter that normally causes a calming effect in the body. As a result of adrenaline release, heart rate will increase. However, the stimulation of central nervous system can produce fatigue and restlessness1. Variables: * Independent: time of heart rate measurement at regular time interval of 15 minutes * Dependent: cardiovascular rate * Controlled: amount of caffeine intake Control of variables: As for controlled variables, I will be controlling the amount of caffeine intake which is 160 mg. ...read more.

Middle

Calculation of mean and standard deviation of heart rate (Person 6 - 10) Person 6 Person 7 Person 8 Person 9 Person 10 Mean 78.5 90.75 77.25 85 85 STDEV 3.696846 4.112988 5.315073 5.228129 5.560276 Table 5. Calculation of mean and standard deviation of 2 groups as a whole Group N Mean Stdev Std. Error Mean Pre-test3 10 82.6 11.1774 3.5346 Average4 10 84 11.8533 3.7483 Mean of heart rate of Person 1 = Standard Deviation of Person 1 Step 1: calculate the mean = 67.5 Step 2: calculate the deviations Step 3: square the deviations Step 4: calculate the standard deviation T-test Calculation of Person 1 Summary of results: The mean of the pre-test of heart rate turns out to be lower than the mean of the heart rate after caffeine consumption (82.6 < 84)5. The calculated standard deviation of the pre-test of heart rate in comparison to the heart rate after caffeine consumption is from 11.1774 to 11.8533. ...read more.

Conclusion

For example, a younger male athlete with low caffeine tolerance will demonstrates a higher average heart rate than one who has higher caffeine tolerance. * Human errors occur with the lack of knowledge on how to operate the equipments properly. Holding the heart rate grip monitor properly between the experimenters and experimentees is important. * An individual must completely by resting while testing for resting heart rate. Exercising during this operation will result in inconsistency. * Equipment error is an additional limitation of procedures. After my experience with the Heart Rate Grip Monitor, on one occasion, one's heart rate will start properly (i.e. 86 bpm). However, there are times when the result will show to be 0 bpm. When the starting point is at 0 bpm, the average will alter resulting in inaccuracy and inconsistency with other averages. Procedure modification: * Do not exercise or conduct any other activity while getting the resting heart rate. * Read the manuals and know your procedures prior to conducting the experiments. * Categorize individuals into either gender or heart condition (between an athlete and sedentary individuals) to increase reliability. ...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. To investigate how aerobic exercise affects the heart rate

    � 5 150 3 3 149 160 162 155 160 (149+160+162+155+160) � 5 157 5 4 154 164 165 161 157 (154+164+165+161+157) � 5 160 5 5 156 168 163 170 162 (156+168+163+170+162) � 5 164 5 Presentation of processed data CONCLUSION AND EVALUATION Graph analysis The graph above shows

  2. Biology Extended Essay 2009

    of orange juice by counting the numbers of drop of orange juice required for the dye to turn colorless.18 Aim: Investigate the differences of Vitamin C content between freshly squeezed orange juice and the processed orange juice regarding six leading Australian brands of juice available in supermarket.

  1. The effect of pvc piping on the breathing/heart rates of male year 12 students

    Assuming that subjects were inhaling at constant pressure the increases in the pressure required from 25cm to 50cm would be lower than the pressure required from 50cm to 75cm because of the increasing pressure gradient. This increase via pressure gradient is much like the affects of pressure on volume which is experienced by scuba divers.

  2. Biology Heart Rate Lab. What are the effects of decreasing the amount of ...

    Trial 4 of heart rate measured for a duration of 3 minutes after different amounts of water consumption. Amount of Water Consumed (mL � 10mL) Number of Heart Beats (beats � 2 beats) 100 246 500 234 1000 225 1500 225 2000 204 Table 5.

  1. How the Heart Works

    The first sound "lub" is not the contraction of the heart, as many believe it is, but purely vibrations caused by the closure of the atrioventricular valves (The tricuspid valve and the mitral valve). The "dub" sound is created on the same principle only that this time it is the pulmonary and aortic valve that close causing the sound vibrations.

  2. Bio lab - Oxygen Consumption in germinating and non-germinating seeds

    0.87 10 0.91 0.76 0.87 15 0.90 0.69 0.86 20 0.88 0.59 0.86 25 0.79 0.39 0.83 30 0.77 0.35 0.81 Raw Data Table 6: The volume of the water level at the reading of the 1.0 ml pipettes of the respirometres for 30 minutes in room temperature.

  1. An experiment to determine the effect of caffeine on heart rate

    This can be done so by placing two fingers on the neck or placing two fingers on the opposite wrist. Record this data in a table. Start off with the 25ml of Bison. Drink this volume of Bison and start the stopwatch.

  2. Sleep is a normal part of human life. Investigate the neurobiological basis of normal ...

    Total sleep duration of 7 hours per night over 1 week has resulted in decreased speed in tasks of both simple reaction time and more demanding computer-generated mathematical problem solving. Total sleep duration of 5 hours per night over 1 week leads to impairment of cognitive work requiring simultaneous focus on several tasks.

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