A study says energy drinks cause insomnia and nervousness. Energy drinks are commonly used by athletes to enhance their performance.
The study about the positive and negative effects of energy drinks on athletes done by experts from the Camilo Jose Cela University (UCJC), Spain.
Juan Del Coso Garrigas, in-charge of the Exercise Physiology Laboratory at UCJC said, "Athletes felt they had more strength, power and resistance with the energy drink than with the placebo drink."
"However, the energy drinks increased the frequency of insomnia, nervousness and the level of stimulation in the hours following the competition," Juan Del Coso added.
To experiment this, sportsmen of football, basketball, rugby, volleyball, tennis and hockey players, took the equivalent of three cans of energy drink or an energy drink placebo before a sports competition.
The athletes increased their sporting performance by between 3% to 7%, along with side effects, which are typically found with other caffeinated drinks
The researchers noted that the concentration of caffeine (32 mg/100 ml of product) present in energy drinks provides a total of 80 mg of caffeine per 250 ml can
Experts explained the content of the drinks that contains carbohydrates, caffeine, taurine and B vitamins, with little difference in ingredients among the main energy drink brands
Moreover, energy drinks do not provide more energy than other soft drinks, but they do have an "energizing" effect related to the stimulation provided by caffeine, says researchers.