Potassium is the major cation (positively charged electrolyte) and is prevalent within cells, while sodium is an electrolyte that is largely out of the cell. Because of its concentration and location, potassium plays an important role in the metabolism of water and other processes in the body.
In the general population, under normal circumstances, there is no deficit of potassium, because in food it has more than enough. Only in the case of increased consumption, the excretion of potassium in the urine or sweat may cause Hypokalemia. Such a situation could befall athletes because physical activity is causing rapid lost of the these electrolytes. A large trial conducted in the United States in a variety of sports disciplines revealed that the potassium deficit is much higher than previously thought. Because of this, it is added to the isotonic drinks and in tablets during end-stage.
Specifically, the effect of potassium in the body combined with chlorine and sodium, ie. other electrolytes, is to enable the conduction of impulses in nerve fibers. The physical exhaustion caused by intense training leads to psychological changes that just attributed to the weakening of electrolyte connections and reduced conduction of nerve impulses.
Potassium also regulates blood pH, ie. the acidity of the blood, and on the pH are depending a number of other functions of the organism, such as blood pressure.
Potassium is essential in the metabolism of proteins and carbohydrates. All pay attention to sodium, but it should actually be forgotten, and the attention should be paid to potassium.
In addition to the athletes on potassium deficiency should pay and those who are suffering from diarrhea or vomiting, or because of high blood pressure pharmaceuticals with diuretics that consume potassium.
The potassium can be found in many foods, especially fruits and vegetables. Good sources of potassium include beans, milk and tomatoes. However, the potassium is most concentrated in the instant coffee powder, which contains about 5% of that element. This means that coffee is made with 2 teaspoons instant coffee quite a sufficient source of potassium. It is very dangerous to compensate potassium on your own, by using tablets or powders potassium chloride because hyperkalemia can lead to cardiac arrest and death(You should search for professional help if you want to consume more potassium). Look at the tennis players who are well aware that the bananas have up to 500 mg of potassium/ 100 g of bananas and at every break they consume several bites.