A way to Start the day without a hot Cup of coffee is for many people unimaginable. In the coffee contained caffeine, our blood circulation and has a positive effect on our mood. On average, each German consumes daily about 200 milligrams of caffeine in addition to coffee, the absorption also takes place over tea, Cola, energy drinks and chocolate. Since caffeine has a stimulating effect, help us to have a Cup of coffee or a glass of Cola to overcome small performance lows. However, caffeine can, especially if it is to consume a lot of it is also side effects.
Effect of caffeine
Caffeine takes between 30 and 45 minutes to enter the bloodstream. About this it is distributed in the body, before it is finally excreted with the urine. The half-life of caffeine in the body is approximately four hours. In the case of persons, in which the caffeine removal is slowed down, as in the case of Pregnant women, can increase the half-life to up to 20 hours.
Caffeine has a broad spectrum of action: In small doses it has a particularly stimulating effect on the Psyche – the concentration is eliminated to be improved, and fatigue. In addition, the memory capacity of the brain is increased. Thus, the impact of caffeine in the test phase in the short term a positive effect on the learning performance.
Higher caffeine has dosed also have an impact on the cardiovascular System. By the intake of caffeine, the heart beats more frequently and stronger, thus increasing the pulse and blood pressure increase. The increase in blood pressure, however, is only minimal and occurs especially in persons who are not accustomed to caffeine.
Caffeine and sports
Caffeine has vessels also have an effect on the blood While the blood vessels in the periphery to expand, constrict the blood vessels in the brain – therefore, caffeine may have a headache or migraine relieving effect. Therefore, the pain killers is now in some head in addition to the pain-relieving active substances, also contain caffeine.
The Vascular dilation in the periphery can also be a positive effect of caffeine on sports performance suggests that as the muscles can be better supplied with oxygen. In addition, can also impact the increased activity of the heart as well as the expansion of the bronchi due to caffeine a positive effect on our performance.
The mechanism of action of caffeine
Many people take caffeine, be it in the Form of coffee, energy drinks or caffeine tablets, to improve your attention. The positive effect of caffeine on our attention and concentration is due to the fact that caffeine interferes in our body in certain processes.
If our nerve cells are active, they consume energy, wherein as a by-product of adenosine is formed. The more the nerve cells work, the more adenosine is released. It ensures that the cells of the nervous strain in our brain. This is done by the fact that adenosine specific receptors, which are important for the conduction, responsible, activated. The receptors are activated, it forwards the information more slowly from nerve cell to nerve cell.
Caffeine has a structure similar to adenosine and can dock on the same receptors. It is the receptors occupied, however, only to activate without this. Consequently, is sent to the nerve cells a Signal to the slower Work – the nerve cells continue.
By regular consumption of caffeine the body gets used to the substance and the effect of caffeine on attention and concentration. This is due to the fact that the body is formed with time, more and more adenosine receptors, and the molecule, thus returning to some of the free receptors can dock. In order to achieve again a performance enhancing effect, will have to increase caffeine intake.
Caffeine: side-effects and withdrawal symptoms
Caffeine is consumed in large quantities, it can cause a number of side effects. These include sleep disturbances, headaches, nervousness or gastrointestinal discomfort. Similarly, the consumption of caffeine can have a loss of fine motor skills. Those who regularly consume caffeine, suffers, however, is rarely limited to the described side effects, there is a habituation effect occurred.
Those who feed his body over a period of regular caffeine in high doses, can be addicted to caffeine. Whether you suffer from caffeine addiction, one can easily test for yourself: it Comes with a reduction in caffeine consumption to withdrawal symptoms, is addictive. To phenomena occurring withdrawal headaches and Nausea, but also loss of energy and drowsiness. In addition, it must also be influences on mood: A loss of drive and Motivation, but also depression-like States and irritability are typical signs of withdrawal. Put in about 12 to 24 hours after the last caffeine ingestion and can last up to nine days.
From an Overdose of caffeine is referred to as an amount of a grams of caffeine. Such a dose can have an accelerated heart rate, and extrasystoles. Moreover, it can lead to restlessness and insomnia. In some persons may occur due to excessive caffeine consumption, anxiety. In the worst case, an Overdose of caffeine may have a circulatory collapse.
more article content
- Caffeine: effect and side effects
- Caffeine: interactions and use