Caracterização do comportamento de movimento de 24 horas e sua relação com a aptidão física em adolescentes obesos - um estudo piloto

Abstract

INTRODUCTION: Insufficient amounts of physical activity, excessive sedentary behavior, especially recreational time and insufficient sleep, are associated with a variety of physical health indicators, such as low levels of cardiorespiratory fitness and strength among school children and young people. This set of indicators has been referred to as the "movement behaviors" since they are codependent and collectively responsible for the entire 24-hour period. OBJECTIVE: To characterize the 24-hour movement behavior and to verify its relation with physical fitness in obese adolescents. METHODS: This was a cross-sectional pilot study that sought to characterize the 24- hour behavior in obese adolescents (age: 16.1 ± 1.5 years, fat percentage: 36.9 ± 4.9) , male, objectively measuring the levels of physical activity in moderate and vigorous intensities, total amount of daily steps, sedentary behavior and sleep through the use of acelometry (GT3X + Actigraph), to verify their relation with physical fitness related to Cheers. Dual energy X-ray absorptiometry (DXA) was used for the analysis of body composition. The peak VO2 was verified through an incremental test in cycloergometer in an indirect way, and the manual grip strength was measured by dynamometry. The results of the studied variables were presented in mean and standard deviation values of the 34 participants. The Pearson and Sperman correlation tests were used to examine the possible relationships between the variables of movement behavior and health-related physical fitness. RESULTS: Among the sample analyzed, 59% (n = 20) of the adolescents did not comply with any of the recommendations of movement behavior in 24h. The mean total amount of daily steps was 8403.3 (± 2849.8); 36.6 (± 22.2) minutes dedicated to moderate and vigorous physical activity; on average, they remain 3.1 (± 1.5) hours in recreational screen time and represent 7.7 (± 1.3) hours of uninterrupted sleep. Despite the percentage of adolescents who did not follow the guidelines, we still observed a positive correlation between manual grip strength and moderate and vigorous physical activity (rs = 0.28, p = 0.001) and total daily steps (rs = 0.15, p = 0.02). CONCLUSION: The vast majority of obese adolescents do not comply with all recommendations of the 24-hour movement guide, and more than half of obese adolescents do not comply with any recommendation, with sedentary behavior and moderate to vigorous intensity physical activity as the components with lower frequency of compliance. In addition, intensity-independent physical activity correlates directly with increased muscle strength.