Nutrição e exercício na prevenção e controle das doenças cardiovasculares

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Abstract

As doenças cardiovasculares constituem a principal causa de mortalidade no mundo e o seu crescimento significativo nos países em desenvolvimento alerta para o potencial impacto nas classes menos favorecidas. São influenciadas por um conjunto de fatores de risco, alguns modificáveis mediante alterações no estilo de vida, como a dieta adequada e o exercício regular. O objetivo da presente revisão é abordar esses aspectos a fim de prevenir e controlar as doenças cardiovasculares. O consumo de vegetais, frutas, grãos integrais, soja, azeite e peixes deve ser aumentado, ainda que limitando a quantidade de gordura. Os alimentos ricos em ácidos graxos saturados e trans devem ser evitados, assim como o uso excessivo de sal e bebidas alcoólicas. Além do exercício aeróbio, as atividades contra resistência vêm aumentando sua importância na reabilitação cardíaca. Essas mudanças de estilo de vida deveriam ser prioridades na Saúde Pública a fim de deter o avanço das doenças cardiovasculares em nosso país.

Translated abstract

Cardiovascular diseases represent the major worldwide cause of death, and their significant growth in developing countries alerts against their impact on underprivileged classes. Cardiovascular diseases are subject to a set of risk factors, some of which can be altered through changes in lifestyle, such as balanced diet and regular exercising. The purpose of this review is to approach these factors in order to prevent and control cardiovascular diseases. The consumption of vegetables, fruit, whole grains, soybeans, olive oil, and fish must be increased, although limiting the amount of fat. Saturated and trans fatty acids must be avoided, as well as excessive use of salt and alcoholic beverages. Besides aerobics, resistance training activities are increasing their importance in cardiac rehabilitation. Such lifestyle changes should be prioritized by Public Health authorities in order to hold back cardiovascular disease occurrence in our country.

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Whole-grain consumption and risk of coronary heart disease: results from the Nurses' Health Study.

Simin Liu, Meir J. Stampfer, Frank Hu … (1999)

Although current dietary guidelines for Americans recommend increased intake of grain products to prevent coronary heart disease (CHD), epidemiologic data relating whole-grain intake to the risk of CHD are sparse. Our objective was to evaluate whether high whole-grain intake reduces risk of CHD in women. In 1984, 75521 women aged 38-63 y with no previous history of cardiovascular disease or diabetes completed a detailed, semiquantitative food-frequency questionnaire (SFFQ) and were followed for 10 y, completing SFFQs in 1986 and 1990. We used pooled logistic regression with 2-y intervals to model the incidence of CHD in relation to the cumulative average diet from all 3 cycles of SFFQs. During 729472 person-years of follow-up, we documented 761 cases of CHD (208 of fatal CHD and 553 of nonfatal myocardial infarction). After adjustment for age and smoking, increased whole-grain intake was associated with decreased risk of CHD. For increasing quintiles of intake, the corresponding relative risks (RRs) were 1.0 (reference), 0.86, 0.82, 0.72, and 0.67 (95% CI comparing 2 extreme quintiles: 0.54, 0.84; P for trend < 0.001). After additional adjustment for body mass index, postmenopausal hormone use, alcohol intake, multivitamin use, vitamin E supplement use, aspirin use, physical activity, and types of fat intake, these RRs were 1.0, 0.92, 0.93, 0.83, and 0.75 (95% CI: 0.59, 0.95; P for trend = 0.01). The inverse relation between whole-grain intake and CHD risk was even stronger in the subgroup of never smokers (RR = 0. 49 for extreme quintiles; 95% CI: 0.30, 0.79; P for trend = 0.003). The lower risk associated with higher whole-grain intake was not fully explained by its contribution to intakes of dietary fiber, folate, vitamin B-6, and vitamin E. Increased intake of whole grains may protect against CHD.