Background Regular PA is thought to have positive effects on well-being, which might also be explained by anti-inflammatory processes. Previous research has shown that PA is inversely associated with inflammatory responses to stress but this work has been cross-sectional. Given the pivotal role of stress in promoting inflammation and depression, ...
Background Accelerometers measure levels of physical activity (PA) objectively, and they are being increasingly used to obtain information on PA in children. Functional Data Analysis (FDA) is a statistical method that can be used to better characterise continuous activity patterns and their variation over time. The objective of this study ...
Background The study aim was to investigate whether it is possible to use the accelerometer of mobile phones as a valid and reliable tool for monitoring the physical activity. Method A specific mobile phone application to gather and record time varying acceleration was developed. The accelerometer integrated within two mobile ...
Background/Aims Proponents of the Daylight Saving Bill currently under consideration in the UK parliament have hypothesised that extending afternoon daylight would promote child physical activity. Our aim was to investigate the relative contribution of day length and weather to children's physical activity, and the behavioural mediators underlying these effects. ...
Background The mechanisms underlying the cardia-protective effects of physical activity in older adults remain poorly understood. We examined the relationship between objectively measured physical activity during free-living and novel cardiac risk markers, including coronary artery calcium (CAC) and pericardial fat (PF). Methods Participants were 446 healthy men and women (mean age=66±6 ...
Purpose Accelerometers are recognized as a valid and objective tool to assess free-living physical activity. Despite the widespread use of accelerometers, there is no standardized way to process and summarize data from them, which limits our ability to compare results across studies. This paper a) reviews decision rules researchers have ...
Abstract This paper reviews the collective experience of monitor calibration studies in adults and seeks to answer the following questions: What has been done? What have we learned? What could be done to further enhance the comparability of results from future calibration research? Calibration studies in adults have typically used ...
Purpose To assess the association between activity monitoring devices for estimating energy expenditure (EE) in the context of a home-based rehabilitation program. Methods Twenty four patients with abdominal aortic aneurysm (AAA) disease participating in a home-based rehabilitation program were studied. For 3 consecutive days (12 awake hours/day), subjects wore an accelerometer (...
Objective measurement of physical activity remains an important challenge. For wearable monitors such as accelerometer-based physical activity monitors, more accurate methods are needed to convert activity counts into energy expenditure (EE). Purpose The purpose of this study was to examine the accuracy of the refined Crouter 2-Regression Model (C2RM) ...
Background Accurate objective assessment of sedentary and physical activity behaviours during childhood is integral to the understanding of their relation to later health outcomes, as well as to documenting the frequency and distribution of physical activity within a population. Purpose To calibrate the Actigraph GT1M accelerometer, using energy expenditure (...