Background and Purpose Physical activity (PA) during childhood and adolescence is essential for good health, normal growth and development. Accurate measurement of PA in children has a great importance for assessing frequency, duration and intensity to examine the trends, dose response and effectiveness of interventions to reduce the attributable risk ...
The last 20 yrs have seen a marked increase in studies utilizing actigraphy in free-living environments. The aim of the present study is to directly compare two commercially available actigraph devices with concurrent polysomnography (PSG) during a daytime nap in healthy young adults. Thirty healthy young adults, ages 18–31 (mean 20.77 yrs, SD 3.14 ...
Investigations using wearable monitors have begun to examine how sedentary time behaviors influence health.
Purpose
The objective of this study is to demonstrate the use of a measure of sedentary behavior and to validate the activPAL (PAL Technologies Ltd., Glasgow, Scotland) and ActiGraph GT3X (Actigraph, Pensacola, FL) for estimating ...
The main purpose of this study was to assess the inter-monitor reliability of the tri-axial GT3X Actigraph accelerometer over a range of physical activities (PA). This device collects motion data on each of the vertical (Y), horizontal right-left (X), and horizontal front-back (Z) axes and also calculates the vector ...
Introduction
Project FFAB is an exploratory controlled before and after study of the effects of a practical and engaging low-volume high-intensity training (HIT) intervention on cardio-metabolic risk markers. The extent to which adaptations to HIT can be maintained is unknown (Gibala & McGee, 2008). We aimed to evaluate the maintenance of ...
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 ...
Objectives
The GT1M ActiGraph has been replaced by the triaxial GT3X which includes an inclinometer to detect postures. The purpose of this study was to investigate comparability of the GT3X to the GT1M and to develop activity intensity cut-points for the vector magnitude of the GT3...
Reduced physical activity is an important feature of Chronic Obstructive Pulmonary Disease (COPD). Various activity monitors are available but their validity is poorly established. The aim was to evaluate the validity of six monitors in patients with COPD. We hypothesized triaxial monitors to be more valid compared to uniaxial monitors. ...
Objective
To compare total daily energy expenditure (TDEE) from accelerometry models and combined heart rate with motion sensor.
Methods
Twenty male subjects were involved in this study (25.5±5.3 years; 73.2±9.9 kg). TDEE was measured using a combined heart rate monitor with a motion sensor (Actiheart), and the corresponding equations for the Actigraph ...
Objective
To evaluate the classification accuracy of five ActiGraph moderate-to-vigorous physical activity (MVPA) cut-point definitions in pre-school children using energy expenditure measured by whole-room calorimetry as the criterion measure.
Methods
20 children aged 4-6 years (5.1 ± 0.8years) completed a ~50 min whole-room calorimeter protocol involving age-appropriate moderate and vigorous physical activities (eg. rumling ...