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Excessive accumulation of fat in the abdominal area is already an indicator of known risk of cardiovascular disease. According to the World Health Organization (WHO), the measurement should not exceed 94 cm (cm) in men and 90 cm in women. A new study, developed by researchers from Unesp University of São Paulo (Unesp), however, revealed that physically active and non-obese people whose weight / height ratio size (HRR) was close to the risk limit were also more likely to develop disorders. in the heart.
The RCE is obtained by dividing the waist circumference by the height. "Until then, values above 0.5 indicated a high risk of developing cardiovascular or metabolic disease, with values below 0.5 indicating that the person was apparently at lower risk," explained Vitor Engrácia Valenti, professor at the Unesp de Marília and coordinator of the research. For this study, 52 healthy and physically active men aged 18 to 30 years were selected
According to Valenti, recent studies suggest that the CER provides more accurate information about cardiovascular risks than the index of body mbad (BMI). which evaluates the distribution of fat by the body. "The result we find draws the attention of those who think [estão fora dos grupos de risco] that they do not have stomach, but do not do physical activity nor maintain good eating habits. "
The study, which is supported by the Foundation for Research Support of the State of São Paulo (FAPESP), was conducted in collaboration with Oxford Brookes University, England, and published in the journal Scientific Reports.
Assessment
The study participants were divided into three groups: the first, consisting of men with lower body fat percentage and RCE between 0.40 and 0.449; the second, consisting of men with CERs between 0.45 and 0.50, close to the risk threshold; and the third, for men with CERs above the risk limit, between 0.5 and 0.56. "We evaluated the physiological parameters of the autonomic nervous system by the heart rate before and for one hour after recovery through exercise," Valenti explained.
They were evaluated for two days. During the first exercise, participants had to sit for 15 minutes at rest, then run completely on a treadmill. The goal was to discover that everyone was physically active. Although they are not athletes, they have maintained regular activities. Then they should rest for 60 minutes
On the second day, they underwent moderate physical exercise: a 30-minute walk on a treadmill. The intensity would be about 60% of the maximum effort. The intention was to observe, during the rest and the first hour after the exercises, the speed of autonomous cardiac recovery. "The longer the body takes a long time to recover from physical exertion, this indicates that the person is more likely to develop cardiovascular diseases, such as hypertension, stroke, stroke," said the researcher.
The results showed that with groups with near and above heart attack risk limit for heart disease, autonomous autonomic cardiac recovery was slower at maximum and moderate effort. "Even healthy and physically active people, who were neither overweight nor obese, but who had normality values closer to risk values, were at a higher risk than those composed of individuals. whose waistline and stature were smaller ","
The researcher explained that it was an initial study, but with "strong evidence" of the need for revise the reference values. "Let us now leave the idea that this is done in other countries, with another population, under other conditions. Here we check in the Brazilian population. If we think about the people of China, Japan, which has a different culture, different customs, we can not generalize based solely on the results of the Brazilians, "he warned. obesity as a global epidemic.An estimated 1.9 billion adults are overweight, of whom 600 million are obese.In Brazil, surveillance of risk factors and protection of chronic diseases by telephone survey (Vigitel ) of the Ministry of Health in 2017 showed that 18.9% of Brazilians are obese.In addition, more than half of the population of Brazilian capitals (54%) is overweight.
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