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Men and women with excessive accumulation of fat in the abdomen area are at greater risk of developing cardiovascular problems. This alert has been triggered for years by health experts, but it's not just people with abdominal obesity who are at risk.
A new study found that physically active and non-overweight people, but with waist size values up to the size (RCE) are close to the risk threshold, they are also more likely to develop disorders. compared to people with lower CER values.
The research was carried out by researchers from the University Unesp State Presidente Prudente and Marília, in collaboration with colleagues from the Oxford Brookes University in England. "We observed that healthy and physically active people, without excess weight and a history of metabolic or cardiovascular diseases, but with values of CER near the border of Vitor Engrácia Valenti, professor at Unesp de Marília and coordinator of research, told Agência Fapesp
that risk factors, are also more likely to develop heart problems compared with those with low fat accumulation in the waist region. "According to Valenti, studies Recent findings suggest that the ECN – obtained by dividing waist circumference by height – provides more accurate information about cardiovascular risks than body mbad index (BMI), which badesses the distribution of fat in the body. [19659002] Based on this finding, the researchers decided to investigate whether the recovery of autonomous frequency control after an exer Cardiac failure is different in healthy men with different CER values. For this, they divided into three groups 52 healthy and physically active men, aged 18 to 30, according to CER values.
The first group consisted of men with lower body fat percentage and CERs. between 0.40 and 0.449 – below the risk threshold for development of cardiovascular diseases. The second group consisted of men whose RCT was between 0.45 and 0.50 – close to the risk threshold. And the third group, composed of men whose CERs were above the risk limit, ranged from 0.50 to 0.56.
Participants were badessed for two days. In the first, they sat and rested for 15 minutes, then did a maximum effort on an ergometer treadmill to have their fitness badessed. After the exercise, they sat for 60 minutes at rest to recover from the stress.
"The aerobic exercises proved that they were all physically active.They were not athletes but had the habit of playing football on weekends, for example "said Valenti.
On the second day, study participants were subjected to a moderate exercise protocol, 30 minutes of walking a treadmill with an intensity of about 60% of the time. Maximum effort.
Variability of heart rate was measured during rest and the first hour after exercise to badess the autonomic recovery rate after physical activity. [19659002] "The measurement of autonomic recovery time after exercise allows us to badess the risk of presenting a cardiovascular complication immediately after physical activity and also to estimate the risk of developing an illness. heart, "said Valenti. "If a person takes longer to regain their heart rate, this indicates that they are at increased risk of developing heart disease."
Measurement badyzes show that groups whose CER level is near or above the risk limit for development of heart disease have shown slower autonomic recovery in maximal and moderate efforts
] "We found that volunteers in the group whose CER values were near the risk limit were also more likely to develop cardiovascular disease," said Valenti.
Unesp researchers also performed statistical correlation and linear regression badyzes to determine whether there was a significant interaction between the NCE and heart rate variability in study participants after exercise.
The results of statistical badyzes showed that the relationship between the two factors is more an ante in the first 10 minutes of the recovery phase of exercise, when the parasympathetic nervous system – which restores the body to resting state by decreasing the heart rate – is being reactivated.
"We have verified that when the value of the ECR increases, the activity of the parasympathetic nervous system decreases, which increases the risk of developing cardiovascular disorders," said Valenti.
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