Background: Being outdoors may have health benefits including being more physically active. Understanding the relationship between outdoor time and health is hampered by the difficulty of measuring outdoor time. Purpose: To examine the accuracy and validity of light-sensor and GPS methods for quantifying outdoor time among those aged 3-5 years ...
Aims Understanding trends and tracking of children's physical activity (PA) could help to optimise the type and timing of interventions designed to make children more active. The aims of this longitudinal study were to establish the age at which PA levels begin to fall and to determine whether inactivity in ...
Aim The weather may be a barrier to physical activity but objective assessment of this hypothesis is scarce. This study evaluated the effect of temperature and rainfall on the daily physical activity of Danish preschool children. Furthermore within-day variability in physical activity was studied for both weekend and weekdays. Methods ...
Aim To investigate eight-year changes in fatness, fitness and physical activity in a cohort of Icelandic children by comparing measurements conducted at two different time points. Methods In 2003 a total of 489, 9-year-olds participated in a study called Lifestyle of 9 and 15 year-old Icelanders. A total of 258 from this cohort were recruited ...
Introduction Data on physical activity levels of adolescents are mostly derived from self-reported instruments, and the vast majority of studies using objective measures are from high-income countries. The aim of this study was to describe the patterns of objectively measured physical activity in Brazilian adolescents. Methods In 2004–2005 (mean age of 13.3 ...
Purpose It is a commonly held perception that most young children are naturally active and meet physical activity recommendations. However, there is no scientific evidence available on which to confirm or refute such perceptions. The purpose of this study was to describe the physical activity levels and patterns of Australian ...
Abstract Accurate and reliable methods for assessing human physical activity (PA) energy expenditure (PAEE) are informative and essential for understanding individual behaviors and quantifying the effect of PA on disease, for PA surveillance, and for examining determinants of PA in different populations. This article reviews recent advances in the estimation ...
The quantification of free-living physical activities is important in understanding how physical activity and sedentary behaviour impact on health and also on how interventions might modify free-living behaviour to enhance health. Quantification, and the terminology used, has in many ways been determined by the choice of measurement technique. The inter-related ...
Introduction Physical activity is seen as an integral component of a healthy lifestyle and has the potential to produce significant health benefits amongst individuals (Pedersen & Saltin 2006). It therefore plays a major role in the field of public health and primary prevention. Compared to the general population, unemployed persons show ...
Introduction It is strongly recommended to use objective measurements for the assessment of physical activity among children and adolescents. However, as some activities such as bicycling/inline skating/scooter are incorrectly recorded by accelerometer, assisting methods are needed to obtain correct data. The aim of the study was to examine ...