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Classifiers for Accelerometer-Measured Behaviors in Older Women
MACHINE LEARNING OLDER ADULTS SITTING WALKING PHYSICAL ACTIVITY SEDENTARY TIME
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2018/4/24
Purpose Machine learning methods could better improve the detection of specific types of physical activities and sedentary behaviors from accelerometer data. No studies in older populations have devel...
An Evaluation of Accelerometer-derived Metrics to Assess Daily Behavioral Patterns
PHYSICAL ACTIVITY EPIDEMIOLOGY MEASUREMENT ASSESSMENT SEDENTARY BEHAVIOR
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2018/4/24
Introduction The way physical activity (PA) and sedentary behavior (SB) are accumulated throughout the day (i.e., patterns) may be important for health, but identifying measurable and meaningful metri...
Towards Uniform Accelerometry Analysis: A Standardization Methodology to Minimize Measurement Bias Due to Systematic Accelerometer Wear-Time Variation
Accelerometry wear-time variation data standardization
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2015/5/22
Accelerometers are predominantly used to objectively measure the entire range of activity intensities – sedentary behaviour (SED), light physical activity (LPA) and moderate to vigorous physical activ...
Using GPS, GIS, and Accelerometer Data to Predict Transportation Modes
PHYSICAL ACTIVITY ACTIVE TRANSPORT PASSIVE DATA COLLECTION MACHINE LEARNING RECORD COHORT STUDY FRANCE
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2017/4/20
Introduction: Active transportation is a substantial source of physical activity, which has a positive influence on many health outcomes. A survey of transportation modes for each trip is challenging,...
Visual Inspection for Determining Days When Accelerometer Is Worn: Is This Valid?
PHYSICAL ACTIVITY EPIDEMIOLOGY WEAR TIME OLDER ADULTS
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2017/4/20
Logs have been traditionally used for ascertaining accelerometer wear days in mail study designs, but not all participants complete logs. Visual inspection of accelerometer output may supplement missi...
Accelerometer Validation of Questionnaires Used in Clinical Settings to Assess MVPA
PHYSICAL ACTIVITY ACCELEROMETRY PHYSICAL ACTIVITY QUESTIONNAIRE SENSITIVITY SPECIFICITY VALIDITY
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2017/4/19
Introduction: The exercise vital sign (EVS) and General Practice Physical Activity Questionnaire (GPPAQ) are questionnaires designed for clinical settings to identify individuals who are not meeting p...
Accelerometer-based Physical Activity: Total Volume per Day and Standardized Measures
EXERCISE WEARABLE MONITORS ACCELERATION ENERGY EXPENDITURE
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2017/4/19
The use of accelerometers in physical activity (PA) research has increased exponentially over the past 20 yr. The first commercially available accelerometer for assessing PA, the Caltrac, was worn on ...
Accelerometer Adherence and Performance in a Cohort Study of US Hispanic Adults
ACTICAL MISSINGNESS NONWEAR PHYSICAL ACTIVITY SAMPLE WEIGHTS SURVEILLANCE
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2017/4/19
Purpose: This study described participant adherence to wearing the accelerometer and accelerometer performance in a cohort study of adults.
Methods: From 2008 to 2011, 16,415 US Hispanic/Latino adult...
Development and Validation of Accelerometer-Based Activity Classification Algorithms for Older Adults: A Machine Learning Approach
Machine learning algorithms Older Adults Physical Activity Assessment
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2014/10/20
Machine learning algorithms to classify activity type from wearable accelerometers are important to improve our understanding of the relationship between physical activity (PA) and risk for physical d...
Reactivity to Accelerometer Measurement of Children and Adolescents
HABITUAL PHYSICAL ACTIVITY OBJECTIVE ASSESSMENT ACCELEROMETRY MONITORING CHILDREN ADOLESCENTS
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2017/5/23
Awareness of being monitored can influence participants’ habitual physical activity (PA) behavior. This reactivity effect may threaten the validity of PA assessment. Reports on reactivity when measuri...
Establishing and Evaluating Wrist Cutpoints for the GENEActiv Accelerometer in Youth
PHYSICAL ACTIVITY ACCELEROMETRY YOUTH CALIBRATION VALIDATION
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2017/5/19
This study aimed to establish physical activity (PA) intensity cutpoints for a wrist-mounted GENEActiv accelerometer (ACC) in elementary school-age children. A second purpose was to apply cutpoints to...