Clipping of news on Brazilian Culture, Law and Citizenship
06/18/2014
This article was translated by an automatic translation system, and was therefore not reviewed by people.
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In research, substance decreased heart rate of adolescent boys and in girls resulted in different reactions, according to the menstrual cycle
Even at low doses, coffee alters the cardiovascular functioning of children
Even at low doses, coffee alters the cardiovascular functioning of children (John Foxx / Thinkstock)
A survey released Monday by the journal Pediatrics found that caffeine, present in soft drinks and energy drinks, differently affects heart rate and blood pressure of boys and girls after puberty.
KNOW THE RESEARCH
Previous studies have shown that caffeine increases blood pressure and decreases the heart rate in children, adolescents and adults. This time, the researchers wanted to investigate whether gender differences in cardiovascular response to caffeine manifested after puberty and whether this response differed according to the different phases of the menstrual cycle.
The scientists recruited 101 children before puberty (between 8 and 9 years old) and postpubertal (between 15 and 17 years). They examined the heart rate and blood pressure before and after the volunteers ingesting placebo or low doses of caffeine.
There were no differences between the sexes in children aged 8 and 9 years old. Among teenage volunteers, the heart of the boys was more affected by caffeine than girls. In the case of girls, the researchers found that the body's response to the substance changed according to the phase of the menstrual cycle of the participant. Caffeine decreased heartbeat especially those who were in the follicular phase - which goes from the first day of menstruation to ovulation - and elevated blood pressure in the luteal phase of the last cycle.
Source: See Online
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This article was translated by an automatic translation system, and was therefore not reviewed by people.