Nível de atividade física em crianças de dez anos de idade

• Autor(a) principal: Caetano, Isabella Toledo
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3494
• topic: Criança; Atividade física; Recordatório de três dias de atividade física (3DPAR); Acelerometria; Child; Physical activity; Recall three days of physical activity (3DPAR); Accelerometry; CNPQ::CIENCIAS DA SAUDE

The practice of regular physical activity during childhood and adolescence has been recommended to reduce the risk of chronic disease and promote physical and psychological well-being. There is a great difficulty in performing accurate measurements of physical activity levels, plus a few simple, practical and cost- effective for children and adolescents, appropriately validated methods.The main objective of the study was to evaluate the validity of recall 3 days of Physical Activity (3DPAR), Brazilian version, in children 10 years of age, as measured using accelerometry criteria. Secondly, the objectives were: a) check the daily activity level of children in relation to the recommendations of at least 60 minutes of daily physical activity of moderate to vigorous intensity (MVPA), b) verify the influences of sex, schools and school days in these behaviors, c ) analyze the sedentary behavior of the students in their daily activities, checking factors such as gender, type of school and school days influences in this behavior, d) analyze the sedentary behavior of those who study in different shifts (morning or evening) in three windows time (morning, afternoon and evening). Were selected 101 children, 46 boys and 55 girls, with 10-year-old students from municipal and private schools in Viçosa, MG. Used the Actigraph accelerometer model GT3X for three consecutive days, a day of the weekend (Sunday) and two weekdays (Monday and Tuesday) and on the fourth day (Wednesday) met 3DPAR. To analyze the level of physical activity, the accelerometer provides counts / min in five classifications (sedentary, light, moderate, vigorous and very vigorous). For the validity of 3DPAR it was observed significant differences (p < 0.05) for most intensities between time in minutes 3DPAR the criteria and method for the total sample and by gender and type of school. Also noted was a low correlation to the time in minutes in all intensities 3DPAR method and criteria for the total sample and by gender and type of school. However, for sedentary behavior were no significant correlations for the total sample, female and male, private school. The Bland-Altman plots showed that most of the intensities except for moderate, there was an overestimation of the time in minutes 3DPAR on criterion method, all presenting a high standard deviation. All children reached the recommendations of 60 minutes of MVPA. Girls, public school and morning shift had higher counts / min compared to boys, private school students and the afternoon shift, respectively. There were statistically significant differences between genders for the total time of three days (p = 0.040) between the school systems for the total time of 3 days (p = 0.000) for the total time on weekdays (p = 0.000) and the total time of the weekend (p = 0.000) and between shifts for full time of three days (p = 0.010) for the total time of the weekdays (p = 0.010) and the total time weekend (p = 0.010).Sedentary behavior does not differ significantly between the sexes, the school system and school day in relation to the count / min daily. However, when analyzed separately both rounds, there was a statistically significant difference between sedentary behavior time windows in students of morning shift F (2. 102) = 341.270, p < 0.001, &#951;2 = 2.59) and afternoon F (2. 96) = 168.65, p < 0.001, &#951;2 = 1.87) with a high effect size for both cases. It was observed that the students of morning shift have a higher sedentary behavior (p < 0.05) in the morning, followed by afternoon and evening periods. Children's afternoon shift have a higher sedentary behavior (p < 0.05) in the afternoon, followed by the morning and evening. The overall results allow us to infer that the instrument 3DPAR is not sufficiently accurate in assessing the level of physical activity in children 10 years of age, with a tendency to overestimate children's involvement in mild, vigorous and very vigorous intensity. All children reached physical activity recommendations and it was found that there are differences in patterns of physical activity between the sexes, between educational systems and between school shifts. Sedentary behavior is more pronounced in the turn that the children study, reaffirming the premise of the school that marked influence behavior. Considering that children spend several hours of their day at school, it is suggested that schools create intervention projects and incentive policies, in order to offer new opportunities in the curriculum to reduce sedentary behaviors and to enhance the active behaviors.