Research Database

172 results for "Validation"

Choosing Instruments for Research: an Evaluation of Two Activity Monitors in Healthy Women

  • Published on July 20, 2013

Introduction: Activity-based monitors offer researchers a feasible, quantitative means for the assessing physical activity and sleep quality on a consistent and uniform basis. The purpose of this comparative study was to evaluate the reliability and feasibility of the Fitbit 4.10 activity based monitoring system to the standard actigraph GT3X+ in 42 ...


Validity of physical activity monitors during daily life in patients with COPD

  • Published on Nov. 1, 2013

Background: Symptoms during physical activity and physical inactivity are hallmarks of chronic obstructive pulmonary disease (COPD). Our aim was to evaluate the validity and usability of six activity monitors in patients with COPD against the doubly labelled water (DLW) indirect calorimetry method. Methods: 80 COPD patients (mean±SD age 68±6 years and ...


Validating two self-report physical activity measures in middle-aged adults completing a group exercise or home-based physical activity program

  • Published on Nov. 19, 2013

Objectives: To compare self-reported physical activity recorded in physical activity diaries or the Active Australia Survey with objectively measured physical activity using accelerometry in sedentary middle-aged adults completing two physical activity interventions. Design: Cross-sectional study Methods: Sedentary 50-65 year olds were recruited to a non-randomized 6-month community group exercise program (...


Reliability and validity of the multimedia activity recall in children and adults (MARCA) in people with chronic obstructive pulmonary disease.

  • Published on Nov. 27, 2013

Objective: To determine the reliability and validity of the Multimedia Activity Recall for Children and Adults (MARCA) in people with chronic obstructive pulmonary disease (COPD). Design: People with COPD and their carers completed the Multimedia Activity Recall for Children and Adults (MARCA) for four, 24-hour periods (including test-retest of 2 days) ...



Comparison of Objectively Measured and Self-reported Time Spent Sitting

  • Added on March 11, 2014

Abstract: Until recently, methods for objective quantification of sitting time have been lacking. The aim of this study was to validate self-reported measures against objectively measured total sitting time and longest continuous time with uninterrupted sitting during working hours, leisure time on workdays and leisuredays. Objective diurnal measurement of sitting ...


Energy expenditure compared to physical activity measured by accelerometry and self-report in adolescents: a validation study.

  • Published on Nov. 4, 2013

Background: Physical inactivity is responsible for 5.3 million deaths annually worldwide. To measure physical activity energy expenditure, the doubly labeled water (DLW) method is the gold standard. However, questionnaires and accelerometry are more widely used. We compared physical activity measured by accelerometer and questionnaire against total (TEE) and physical activity energy ...


Calibration of ActiGraph GT3X, Actical and RT3 accelerometers in adolescents

  • Published on Feb. 14, 2014

Abstract: The objective of this study was to develop count cut-points for three different accelerometer models: ActiGraph GT3X, RT3 and Actical to accurately classify physical activity intensity levels in adolescents. Seventy-nine adolescents (10-15 years) participated in this study. Accelerometers and oxygen consumption ([Formula: see text]) data were collected at ...


Accelerometer-Determined Physical Activity and Its Comparison with the International Physical Activity Questionnaire in a Sample of Nigerian Adults

  • Published on Jan. 28, 2014

Introduction Accurate assessment of physical activity to identify current levels and changes within the population is dependent on the precision of the measurement tools. The aim of this study was to compare components of physical activity measured with an adapted version of the International Physical Activity Questionnaire (Hausa IPAQ-SF) and ...