Introduction Accelerometers have been seen as gold-standard objective tool for monitoring childrens’ habitual physical activity. To become biologically meaningful, the activity levels have generally been estimated on the basis of cut-off points. However, there is a lack of general agreement on how to choose the cut-off points (Bornstein et al., 2011). ...
Introduction Stress is the result of several factors, such as work demands, fatigue, sleep, diet and others. Psychological stress depends not only on the magnitude and density of the stress factors, but also from subject’s perception of his/her own capacities to deal with each situations. Psychological stress has ...
Introduction Participation in physical activity on a regular basis is important for maintaining health, yet many people do not meet the levels recommended by scientific and health organizations. Physical activity behavior during the late adolescence/early college period in life is of particular importance as behaviors adopted during this time ...
Introduction Research lacks knowledge regarding the intensity of physical activity (PA) that preschool children need for the sufficient fundamental motor skills (FMS) necessary to be physically active (Stodden et al. 2008). This study aims at determining if different intensities of PA and FMS are related at the age of four. Methods ...
Introduction In previous studies, most of which were cross-sectional, age has been found to associate with physical activity (PA). The aim of the present study was to evaluate whether the PA of 3-year-old children changed over the course of a one-year follow-up. Methods Physical activity levels of children born in 2007 ...
Purpose To determine the effect of body mass index (BMI) on level of agreement between six previously established prediction equations for three commonly used accelerometers to predict summary measures of energy expenditure (EE) in youth. Methods One hundred thirty-one youth between the ages of 10-17 years and BMI from 15 to 44 ...
Introduction The study of physical exercise benefits in health is well documented in the literature. Some of the proposed mechanisms that explain organism function enhancement are related with bioenergetics and mitochondria improvement, associated with decrease in ROS production and increase e antioxidant capacity. As a consequence, oxidative damage tends to ...
Introduction Evidences show that physical activity (PA) has important health benefits in youth. However, incidental PA and exercise declines during adolescence (Van der Horst et al., 2007). There is also an emerging concern about the negative effect that sedentary lifestyles are having on the health of youth (Pate et al., 2011). The ...
Introduction School-based interventions which include efforts to increase physical activity (PA) may promote a healthy weight development in adolescents, but results are inconsistent (Brown et al., 2009). One possible explanation for low efficacy or effectiveness is limited evidence as to how interventions induce behaviour change (Baranowski et al., 2005). The purpose of ...
Purpose The increasing prevalence of overweight and obesity in children and adolescents has been associated with a decline in physical activity (PA). The majority of children display insufficient activity levels (Trojano et al, 2008). Various environmental and biological constraints have been shown to influence children’s PA but only limited information ...