Purpose/Objectives & Rationale: To compare step count accuracy of ActiGraph GT3X+ monitors (hip and ankle placement) with the StepWatch 3 in geriatric in-patients. Relevance: The StepWatch 3 activity monitor is the gold standard for detecting steps in individuals who walk very slowly. However, because the ActiGraph GT3X+ monitor is ...
Background: The steep decline in physical activity (PA) among the oldest old is not well understood; there is little information about the patterns of change in PA and sedentary behaviour (SB) in older people. Longitudinal data on objectively measured PA data can give insights about how PA and sedentary behaviour (...
Abstract: To explore whether nitrogen retention can differ on an isonitrogenous diet by changing when protein is consumed, we performed a short-term study in older individuals (64.5 ± 2.0 years) performing daily exercise while in energy balance. Participants consumed an isonitrogenous–isocaloric diet with the timing of a protein or carbohydrate beverage after ...
Background: The steep decline in physical activity (PA) among the oldest old is not well understood. Longitudinal objective PA data can give insights about how amount and bouts of PA and sedentary behaviour (SB) change with age. Methods: Men aged 70-90 years, from a UK population-based cohort wore GT3x ...
Purpose: To compare the Freedson, Crouter and Santos-Lozano (vertical axis [VT] and vector-magnitude [VM]) equations for ActiGraph GT3X+ (AG) with indirect calorimetry for predicting energy expenditure (EE) in older adults in free-living environments. Methods: Forty older adults (age=77.36 yr (SD+8.13; range 66 to 99 years), BMI=25.96 kg∙m-2 (SD=3.67) completed a ...
Purpose: To assess the criterion validity and responsiveness of the Incidental and Planned Exercise Questionnaire (IPEQ), specifically developed for aging research. Methods: Community-dwelling older adults (n=318, mean age 73.2 years) who participated in a trial investigating the effect of walking program on falls. At baseline a sub-sample (n=177) also wore an ...
Background: Too much or too little physical activity (PA) may increase risk of falls in older adults. To date, no studies have investigated how objectively-measured PA predicts falls in community-dwelling older adults. Methods: 1655/1708 (97%) men aged 71-91 years participating in an established UK population-based cohort study wore a GT3x accelerometer ...
Objective: To investigate whether objectively measured time spent in light intensity physical activity is related to incident disability and to disability progression. Design: Prospective multisite cohort study from September 2008 to December 2012. Setting: Baltimore, Maryland; Columbus, Ohio; Pittsburgh, Pennsylvania; and Pawtucket, Rhode Island, USA. Participants: Disability onset cohort of 1680 community dwelling ...
Purpose: The purpose of this study is to assess the effects of different strategies of health on the levels of physical activity (PA), physical fitness (PF), cardiovascular disease (CVD) risk factors and quality of life (QoL) of the institutionalized elderly. Concurrently studies were made of the effect of detraining on ...
Abstract: We explored using the ActiGraph accelerometer to differentiate activity levels between participants in a physical activity (PA, n=54) or `successful aging' (SA) program (n = 52). The relationship between a PA questionnaire for older adults (CHAMPS) and accelerometry variables was also determined. Individualized accelerometry count thresholds (THRESHIND) measured during a 400-m ...