The affect of Caffeine on pulse rate Essay Example for Free

The affect of Caffeine on pulse govern EssayStimulants are a figure of drug that boosts, alternates and increases your energy levels and they activity of the nervous system. Caffeine is in boozings, such as Coca-Cola, tea and coffee, these are called caffeinated intoxications. Caffeine is non normally recognised as a drug to most. Caffeine has an effect on your heart set up, (this is how fact your hear beats) Caffeine is able to change the way your body and mind whole kit and boodle Chocolate is known to have traces of caffeine in it alsoThe aim What is the point this test-My aim in this experiment is to see what effects caffeine is pr bingle to on the heart outrank, Also to compare someones heart rate who has consumed caffeine to someones who hasnt. This should give us a developed idea to the effects of caffeine. In this experiment there will be several variables-The independent variable-this is the variable I will be changing, this is the number of the great unwashed of which are drinking the caffeine and the ones who are not. The Dependant variable-This is the variable we measure, Im measuring the somebodys heart rate, then working out the difference to show what effects caffeine is likely to have on the heart rate. Controlled variables-The following variables I am keeping the same- dwell temperatureThe volume of the drinkNo-one will consume caffeinated food or drinks beforehand.From what information I have collected I predict that the pulse rate of the people drinking the caffeinated drinks will have an increased pulse, because as research shows, caffeine is a stimulant. Therefor the prediction of an increased heart rate when caffeine enters the birth stream seems reliable. I also reckon after a certain period of time, when the caffeine has left the persons system that the heart rate will humiliate again.Caffeinated Or Not?What will I do? How will I do it?Method- you will needSix cupsA bottle of a caffeinated drinkA bottle of a de-caffeina ted drinkHeart rate monitor or a simple stop watchA sidestep of results to record your dataSteps- What am I going to do?1) Prepare 6 people to take part in the experiment.2) Make all(prenominal) person sit down for 15 minutes in order to calm their heart rate. 3) Pour the caffeinated drink into three cups of a 300 cm cubed volume. 4) Pour the de-caffeinated drink into another 3 cups of the same size. Making sure that the people participating in the experiment do not see which drink they are being given( Blind testing) 5) Take each persons heart rate and record it in a table. This is the starting point 6) split up each person their drink, still making sure you carry out a blind test. 7) Take each persons heart rate every 30 seconds continue to do this for a further 5 minutes. 8) After 5 minutes, take one final heart rate, this will assist with your results. 9) Create a table of results to hold your information in, make sure the table is clear to read and easy to understand. 10) W ork out the difference surrounded by everyones heart rateMethod 2- Shortened version-1) Prepare six people for the experiment by making each person sit down for 15 minutes to calm their heart rate. 2) Pour a caffeinated drink into 3 polyester cups of a 300cm cubed volume. 3) Do the same with the de-caffeinated drinks.4) Label the caffeinated drinks a and the de-caffeinated drinks b, so you wont mix them up, but dont let the participants know which label represents which drink. 5) Take each persons heart rate this is your starting point. 6) Give each person their drink, at random.7) Take each persons heart and record it in a table of results, do this every 30 seconds for a further 5 minutes. 8) With your results fill in your table and work out the difference between the heart rates, this should indicate the heart rates affected by caffeine.About my graph-The graph I utilise for this experiment is a line graph it shows variant results of different students heart rate. The lines on the graph are all unique some have a sudden increase in heart rate whilst others have not. Pupil one- which is the pink line had a base rate of 72 this remained constant throughout the experiment, only rising and falling by a small few. However pupil two had a base rate of 78 but after drinking the drink at somewhat 8-9 minutes the heart rate increased dramatically. Overall 3 results (pupils 1,3 and 5) practically remained the same, whilst the other three (pupils 2,4 and 6) had several increases whilst the drink being in their system. Summing up my results-We know from research that caffeine is a stimulant and stimulants affect the pace of your heart. So the three results that have a big increase in their heart rate, seem to show that they had caffeine in their system. However we did discover an anomaly, after 8 minutes pupil twos heart rate had a dramatic increase. This may well have been the caffeine but its more likely to have been caused by something called a placebo effect.T his is when the pupil go through the drink in the experiment got excited and this is what made the sudden increase in the pupils heart rate. After two minutes pupil fours heart rate increased also, however this time, the increase remained constant for a further two minutes before starting to strike down again. This state a more obvious term of the effect of caffeine. The graph clearly shows which results are the ones effected by caffeine, and the ones which are not. Amendments- what I smoke I do better next time?In future experiments like this one, I think I would make sure that no-one involved in the experiment eats or drinks any caffeinated products before taking part in the experiment. This ensures us that their heart beat is at its normal pace. Because talking and movement can affect how our hearts beat I would also make sure that everyone in the experiment sits down for a longer period of time that was through before.This helps the heart lower to its base rate. Our results w erent really valid because we were unable to control our controlled variable, this may be because the person who had consumed caffeine insisted on talking to everyone else, so this would have increased the other peoples heart rates also. In future experiments we can delay this by keeping people apart(predicate) after taking part in the experiment, this way they cannot influence each others behaviour. Research has shown us that caffeine on average takes around 45 minutes to enter the blood stream, so we cannot be certain our results were due to the effects of caffeine.This could be amended by measuring the pulse rate over a longer time span, so the caffeine had longer to affect our pulse. In the experiment I chose to measure my pulse over a period of two minutes, next time to show more valid and reliable results I would measure my heart rate over shorter intervals. Finally one more improvement would be to test more caffeinated drinks with our pulses, so then we can rule out the thou ght off the results being due to glucose or so on, we then can be sure its definitely caffeine thats increasing out hear rate. Conclusion- what do I think?From this experiment I can conclude that caffeine can affect different people in different ways, depending on their diet, sex and size. Whether they are used to drinking caffeine constantly and how much their body can take of it. My prediction on average was correct as I suggested that the people with caffeine in their system were most likely to have a higher heart rate. This was mainly correct, but I was shocked to find out that my results were not valid due to the length of time caffeine takes to enter the blood stream.An example of caffeine being used may be when an athlete drinks a caffeinated drink before they take part in their sporting event, the effect would be the increase in their pulse and more energy would be dispersed in the body. Personally I dont think this is fair, as I previously said caffeine effects different pe ople in different ways, so caffeine could have a strong effect on certain people, whilst it has a less strong effect on others. This affects the dimension of the game and its not natural energy being used in the event. This could be classed as cheating.