engleski

Cardiovascular and neuromuscular changes after consumption of energy beverages

BACKGROUND: Energy drinks are known as drinks that increase energy level. They contain large amounts of sugar that is used as fuel in the human body. Most studies show positive effects of energy drinks on athlete performance, such as increasing endurance and improving reaction speed, and that is the reason why athletes often consume these beverages. Because of the increased consumption of energy drink Red Bull® among young people, this survey is intended to show cardiovascular and neuromotor changes caused by this drink. METHODS: The study included 27 students of Medical Faculty in Osijek, aged 18-24 years, who have not consumed alcohol or energy drinks one week before testing. Participants were self- control, comparing the parameters obtained by testing before and after consuming an energy drink. They have accessed the Harvard Step Test and speed response measurement. While performing physical work during three minutes, the changes of breathing, heart rate and temperature were measured. Next, these tests subjects were given 500 ml of energy drink, after which they rested again for 30 minutes in lying (recumbent) position. After consumption of energy drinks tests were repeated. RESULTS: The study showed significant differences in speed of response and changes of breathing and heart rate. Skin temperature has not changed. Heart rate was significantly increased in the first minute of exercise after consumption of Red Bull® (139.4±15 versus 148.6±16.1, respectively). Respiration rate increased significantly during the entire exercise after consumption of Red Bull® (first minute result: 21.6±6.1 versus 25.9±6.7, respectively). Maximum air flow is a parameter that is most changed after drinking Red Bull®. It is consistently significantly elevated during the entire exercise and some time after exercise (first minute result: 1.96±0.53 versus 2.64±0.81, respectively). Speed of motor response was significantly elevated after consumption of Red Bull®. The speed is improved in a randomized (0.26±0.04 versus 0.24±0.04, respectively) and fixed interval (0.3±0.05 versus 0.27±0.03, respectively) also. CONCLUSIONS: Research has shown the stimulatory effects of Red Bull® in cardiovascular and neuromotor factors. The biggest changes have occurred in the maximum air flow, then the frequency of breathing and heart rate, because of sympathetic activation. Skin temperature did not change. Also, it can be concluded that the greatest changes occurred thirty minutes after drinking Red Bull, in the first minute of exercise and third minute of rest after exercise. Speed of motor response was significantly faster after drinking this energy drink.

Energy beverages ; Red Bull ; Cardiovascular ; Neuromuscular

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