RESUMO
BACKGROUND: The objective of this study, focused on parents and children to reduce sedentary behavior, consumption of soft drinks and high-fat and salt containing snacks, and increase the consumption of fruits and vegetables, was to assess the effect of a six month intervention and an 18 month follow-up intervention on the body mass index, food consumption and physical activity of 2nd and 3rd grade elementary school children. METHODS: This was a randomized cluster controlled trial. School children were selected from 2nd and 3rd (n = 532) grade. MEASUREMENTS: BMI z-score for age and sex was calculated and classified according to the WHO (2006). Abdominal obesity was defined as WC > 90th of NHANES III. RESULTS: At six months of the study differences were observed in BMI, -0.82 (p = 0.0001). At 24 months, results such as an increase of z-score BMI and waist circumference, a decrease in abdominal obesity, eighth per cent remission and an incidence of 18% of overweight and obesity were observed. Additionally, an increase (p = 0.007) in vegetable intake and physical activity (p = 0.0001) was also reported, along with a decrease in sedentary activities and the consumption of snacks high in fat and salt. CONCLUSIONS: The results of this study indicate that with a comprehensive intervention there is a positive response to lifestyle changes and a reduction of abdominal obesity.
Assuntos
Obesidade/prevenção & controle , Antropometria , Índice de Massa Corporal , Criança , Currículo , Dieta , Ingestão de Alimentos , Feminino , Seguimentos , Humanos , Masculino , México , Pais , Tamanho da Amostra , Instituições Acadêmicas , Comportamento Sedentário , Resultado do TratamentoRESUMO
The beneficial effect of intentional weight loss on mortality is controversial. The purpose of this study was to conduct a systematic review and analyze the quality of prospective studies that assess weight loss on mortality. An electronic search at MEDLINE/PubMed, SciELO, and EBSCO data base, of studies with a follow-up of five or more years, published from January, 2000 to October, 2009, was conducted. Quality of the studies was assessed by Simonsen's criteria. Twenty studies were analyzed. At the beginning of the studies, the age of the subjects ranged from 20 to 101 years. Nine studies included those who intended to loose weight. The quality of the studies ranged from 8 to 17 points (out of 20). Weight loss increased the mortality rate in 15 studies and decreased it in 5. Seven of the studies assessing intention to loose weight showed that weight loss increased the mortality rate, whereas in two the mortality rate decreased. In three out of the four studies that assessed weight fluctuation, the mortality rate increased. These results underline the importance of preventing weight increase, as well as the need to avoid gaining or loosing weight more than 4%.