• 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

    Besides that, there was a gap of about 5 seconds between the time taken after the experiment and before measuring the pulse rate. This is because the test subject has to walk to sit at the table, and the cuff has to be strapped to his arm before the measurement can be taken.

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

    heart rate begins to level off explaining the overlap between increments two and three. Since the error bars between increment one and increment two did not overlap, a t-test was performed in order to identify whether the difference between the two increments was significantly different.

  1. How the Heart Works

    Naturally, the right side of the heart differs from the left side of the heart. The right side is responsible for receiving deoxygenated blood from the body and pumping it to the lungs where it is once more oxidized. The left side is then responsible for collecting newly oxygenated blood

  2. Biology Scientific Events

    RNA interference could change medicine forever. Works cited Pollack, Andrew. "The Promise and Power of RNA." The New York Times. 11 Nov. 2008.17 Nov. 2008 http://www.nytimes.com/2008/11/11/science/11rna.html?scp=1&sq=The%20 Promise%20and%20Power%20of%20RNA&st=cse>. People whose bodies make an unusually active form of a certain protein tend to have dangerously high levels of cholesterol.

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

    Trial 3 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) 100 240 500 216 1000 234 1500 222 2000 216 Table 4.

  2. Comparing the Sexy Sons Hypothesis and the Pathogen Avoidance Models Effects on Sexual Selection

    with greater expression of secondary sex traits likely live shorter lives (Nelson, et al. 2013). Thus, it is far more likely that over the course of many years, females will recognize this fact rather than viewing more ornamental males to be better.

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

    In fact, the sleep-dependent release of luteinizing hormone is thought to be the event that initiates puberty. Other hormones, such as thyroid-stimulating hormone, are released prior to sleep. 2. Renal system. Kidney filtration, plasma flow, and the excretion of sodium, chloride, potassium, and calcium all are reduced during both NREM and REM sleep.

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

    Therefore the uncertainties will remain the same. The temperature of the energy drink The energy drink will remain in room temperature throughout the experiment and will be stored in the same room. METHOD:- Apparatus ? Measuring cylinder Stopwatch Bison energy drink (1880 ml)

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