RESUMO
Family history of hypertension is an important predictive factor for hypertension and is associated with hemodynamic and autonomic abnormalities. Previous studies reported that strength training might reduce arterial blood pressure (AP), as well as improve heart rate variability (HRV). However, the benefits of strength training in the offspring of hypertensive parents have not been fully evaluated. Here, we analyzed the impact of strength training on hemodynamics and autonomic parameters in offspring of hypertensive subjects. We performed a cross-sectional study with sedentary or physically active offspring of normotensives (S-ON and A-ON) or hypertensives (S-OH and A-OH). We recorded RR interval for analysis of HRV. AP was similar between groups. Sedentary offspring of hypertensives presented impairment of total variance of RR interval, as well as an increase in cardiac sympathovagal balance (S-OH: 4.2±0.7 vs S-ON: 2.8±0.4 and A-ON: 2.4±0.1). In contrast, the strength-trained group with a family history of hypertension did not show such dysfunctions. In conclusion, sedentary offspring of hypertensives, despite displaying no changes in AP, showed reduced HRV, reinforcing the hypothesis that autonomic dysfunctions have been associated with higher risk of hypertension onset. Our findings demonstrated that strength-trained offspring of hypertensives did not present impaired HRV, thus reinforcing the benefits of an active lifestyle in the prevention of early dysfunctions associated with the onset of hypertension in predisposed populations.
Assuntos
Humanos , Masculino , Adulto , Adulto Jovem , Treinamento Resistido/métodos , Pressão Arterial/fisiologia , Frequência Cardíaca/fisiologia , Hipertensão/fisiopatologia , Hipertensão/prevenção & controle , Sistema Nervoso Simpático/fisiopatologia , Estudos Transversais , Inquéritos e Questionários , Reprodutibilidade dos Testes , Fatores de Risco , Análise de Variância , Idade de Início , Comportamento SedentárioRESUMO
Abstract Obesity is a universal disease of increasing prevalence and currently assumes epidemiological characteristic, as a main public health issue in contemporary society. Results from genetic, behavioral and environmental factors and it may start at any age. However, obesity appears at early ages predisposes to its presence at later ages bringing several complications, particularly the development of cardiovascular disease. The analysis indicates that autonomic dysfunction seems to be presented among the majority of risk factors that develop this disease, suggesting the need for a deeper study of this mechanism in children population.(AU)