Review of literature
Has your heart rate ever increased after consuming a caffeinated drink? Did it decrease? Maybe it stayed the same? The researcher tested the effect of caffeinated drinks on a person’s heart rate.
If you think you don’t do drugs, your wrong. Caffeine is an alkaloid found in coffee, tea, cacao, and some other plants. It is also present in most cola beverages. Caffeine was discovered in coffee in 1820. The drug increases the blood pressure, stimulates the central nervous system, promotes urine formation, and stimulates the action of the heart and lungs. (Leon L. Bram, 1876, p113)
The researchers hypothesis is if caffeine is a stimulant, then it will increase a person’s heart rate, because the caffeine will absorb into the blood stream and reach the heart, causing the heart to beat faster. Caffeine acts as a stimulant by exerting a strong effect on the central nervous system. The effects of caffeine on the body may begin as early as 15 minutes and last up to six hours. Caffeine may increase heart rate, body temperature, blood flow to the skin & extremities, blood pressure, blood sugar levels, stomach acid secretion and production of urine (diuretic).
Caffeine was originated in Ethiopia. It was found in coffee beans. Coffee shops sprang up throughout Europe – coffee was the fashionable drug of the 17th and 18th centuries; its delights, and the cravings for it, were the subject of J.S. Bach’s “The Coffee Cantata”. Eventually, the caffeine was found in tea, which was very popular throughout Europe. Over time, the drug is favored in mostly cola products. )
... . Limited research links coffee drinking to heart attacks in many people. Caffeine acts on the brain ... caffeine, it increases the circulation of fatty acids. This intern enhances the oxidation of them and increases ... u suffer from caffeine withdraw your blood pressure drops dramatically and all the blood goes to your ... of coffee per day for a human. Although caffeine is proven to reduce rates of sperm ...
So far, the researcher has found that the drug [caffeine] has increased heart rate in most situations. But sometimes, that might no be the case. The information the researcher is about to share, is not from any particular site, but uses her own knowledge on the subject; If a person consumes a lot of caffeine, they might not have much of an increase in heart rate. In fact, the person might not have any increase in heart rate. For example, if a person consumes a caffeinated drink every day, then their body might get used to it, meaning that the hear won’t have much of a reaction.
This I believe has happened to the researcher. When a person’s heart rate increases, the person usually gets “hyper.” The researcher consumes caffeine every day, and does not feel an increase in heart rate, nor does she feel hyper. The researcher also conducted interviews on her topic.
“ Red bull increases my heart rate by 8 beats that I know of, it takes about 20 minutes for me to feel the increase in my heart rate. I feel the caffeine wearing off about 3 hours later. I don’t drink caffeine every day, but I do drink it every week.” (Thomas Stringfellow, 2009, October 28) This was from an interview with a teenage boy that goes to the researchers church. He also said that her drank caffeine to give an energy boost when working and that he doesn’t get tired as fast.
“ When I consume caffeine I do not feel a change in heart rate. But I can feel an increase in energy. It takes a couple of hours for the energy to wear off. But yes, I do drink caffeine every day.” (Karen Monk, 2009, October 28) This was an interview with my mom, who is a nurse at SHAND’S Jacksonville.
“ I can’t consume caffeine at night. It gives me to much energy, and I can’t get to sleep. In the morning though, I do drink caffeine. I can not feel an increase in my heart rate, but I think it does because of the energy I receive.” (Pam Taylor, 2009, November 2) This interview was conducted with my aunt, who also works at SHAND’S Jacksonville.
... 7 to 8 pulse/minute. Hypothesis- If a stimulant increases heart rate, then when the Lumbriculus Variegatus is put into Nicotine ... its heart rate will increase. Materials and Methods: -First, fill a petri ... that stimulants raise heart rate. Conclusions: -Nicotine does have an effect on heart rate. Nicotine has shown a raised heart rate (15.5 pulse ...
Caffeine is defined as a drug because it stimulates the central nervous system, causing increased alertness. Caffeine gives most people a temporary energy boost and elevates mood. Caffeine is in tea, coffee, chocolate, many soft drinks, and pain relievers and other over-the-counter medications. In its natural form, caffeine tastes very bitter. But most caffeinated drinks have gone through enough processing to camouflage the bitter taste. Teens usually get most of their caffeine from soft drinks and energy drinks. (In addition to caffeine, these also can have added sugar and artificial flavors.) Caffeine is not stored in the body, but you may feel its effects for up to 6 hours. (//kidshealth.org/teen/food_fitness/nutrition/caffeine.html)
In massive doses, caffeine is lethal. A fatal dose of caffeine has been calculated to be more than 10 grams (about 170 mg/kg body weight) – this is the same as drinking 80 to 100 cups of coffee in rapid succession – not an easy thing to do. Caffeine enters the bloodstream through the stomach and small intestine and can have its effects as soon as 15 minutes after it is consumed. Once in the body, caffeine will stay around for hours: it takes about 6 hours for one half of the caffeine to be eliminated. Caffeine belongs to the xanthine chemical group. Adenosine is a naturally occurring xanthine in the brain that is used as a neurotransmitter at some synapses. One effect of caffeine is to interfere with adenosine at multiple sites in the brain including the reticular formation. Caffeine also acts at other sites in the body to increase heart rate, constrict blood vessels, relax air passages to improve breathing and allow some muscles to contract more easily. (//faculty.washington.edu/chudler/caff.html)
Again, the researcher will include her own knowledge. When the researcher consumes caffeine, she does not feel her heart rate increase. But, she does feel a bit on an increase in energy, which has to do with heart rate. This goes back to the researchers theory that if you consume caffeine every day, you might not feel that exact increase. The researcher drinks caffeine every day, thus, her heart rate doesn’t increase. It [heart rate] simply stays the same.
... at a 30 year low we are expecting an increase. Interest rate increases are due to two main factors Development of ... bought $20 M worth of 30 day BB's to Bank D at a rate of 4. 83% and then later ... to achieve a very small profit through selling 30 day BB's at yield below that we had previously ... short term securities such as (30, 60 and 90) day bank bills, as well as overnight cash. Investing short ...
The researcher found an internet site that explains an experiment conducted and the results, which she will present now; The researchers found healthy adults who drank two cans of a popular energy drink a day had above normal blood pressure and heart rate. The study was presented to the American Heart Association’s Scientific Sessions 2007 taking place in Orlando, Florida this week, and was carried out by Dr James Kalus, senior manager of Patient Care Services at Henry Ford Hospital in Detroit, Michigan, and colleagues. Although the heart rate and blood pressure increases observed in this study were not dangerous for healthy volunteers, the results suggest the drinks could be dangerous to patients with heart disease, or if drinking more than two cans a day led to even higher increases, to healthy people too. The program conducted the experiment again this time though they did it a little bit differently; the participants drank two cans of an energy drink containing 80 milligrams of caffeine and 1,000 milligrams of taurine, and this was followed by further blood pressure, heart rate and ECG measurements 30 minutes, one two, three and four hours later. This was repeated each day for the next five days, until the seventh day of the study when they repeated what they did on the first day. The results showed that: Within 4 hours of consuming the energy drink, the maximum systolic blood pressure (the higher of the two blood pressure measures, when the heart compresses), increased by 7.9 per cent on day 1 and 9.6 per cent on day 7. Within 2 hours of consuming the energy drink, the maximum diastolic blood pressure (the lower of the two blood pressure measures, when the heart relaxes between beats) went up 7 percent on day 1 and 7.8 percent on day 7. Heart rate increased by 7.8 per cent on day 1 and 11 per cent on day seven. (//www.medicalnewstoday.com/articles/88066.php)
... your target heart rate. The benefits of exercise to the heart are (JHBMC, 2005): o Improves heart and lungs o Decreases resting blood pressure o Decreases ... each day can significantly reduce high blood pressure (Sears, 2003) Exercise Lack of physical activity is another contributor to the development of heart disease ... of sodium to less than 2, 400 mg per day (NHLBI 1999) but not lower than 500 mg per ...
In coclusion, the researcher will test the effect of caffeinated drinks on heart rate. Most information/facts showed that caffeine does increase heart rate. This supports the researchers hypothesis. The results of the researchers project could help people be more aware of their caffeine intake and could also prevent some of the dangers caffeine has on the body.