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Accelerometry and older adults

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https://www.readbyqxmd.com/read/29786659/deep-learning-to-predict-falls-in-older-adults-based-on-daily-life-trunk-accelerometry
#1
REVIEW
Ahmed Nait Aicha, Gwenn Englebienne, Kimberley S van Schooten, Mirjam Pijnappels, Ben Kröse
Early detection of high fall risk is an essential component of fall prevention in older adults. Wearable sensors can provide valuable insight into daily-life activities; biomechanical features extracted from such inertial data have been shown to be of added value for the assessment of fall risk. Body-worn sensors such as accelerometers can provide valuable insight into fall risk. Currently, biomechanical features derived from accelerometer data are used for the assessment of fall risk. Here, we studied whether deep learning methods from machine learning are suited to automatically derive features from raw accelerometer data that assess fall risk...
May 22, 2018: Sensors
https://www.readbyqxmd.com/read/29674286/longitudinal-changes-over-thirty-six-months-in-postural-control-dynamics-and-cognitive-function-in-people-with-parkinson-s-disease
#2
Annette Pantall, Silvia Del Din, Lynn Rochester
BACKGROUND: Postural instability is a common motor feature in people with Parkinson's disease (PD) together with non-motor features such as cognitive dysfunction. Management of postural instability is challenging as it is often resistant to dopaminergic therapy. Greater knowledge of postural control is essential to understand postural instability in PD. RESEARCH QUESTION: This study aimed to answer how postural control differs in people with PD compared to healthy older adults (HOA)...
April 13, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29567100/force-velocity-profiling-in-older-adults-an-adequate-tool-for-the-management-of-functional-trajectories-with-aging
#3
Julian Alcazar, Carlos Rodriguez-Lopez, I Ara, Ana Alfaro-Acha, Irene Rodríguez-Gómez, Roberto Navarro-Cruz, Jose Losa-Reyna, Francisco J García-García, Luis M Alegre
INTRODUCTION: The actual mechanisms leading to a reduced muscle power and functional ability in older adults are poorly understood. We investigated the association between different force-velocity (F-V) profiles and impaired muscle power, physical and cognitive function, frailty, and health-related quality of life (HRQoL) in older people. METHODS: Physical function (habitual gait speed, timed up-and-go test, sit-to-stand and stair-climbing ability), cognitive function, HRQoL and frailty were evaluated in 31 older subjects (70-85 years)...
March 19, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29563028/relationships-between-older-adults-use-of-time-and-cardio-respiratory-fitness-obesity-and-cardio-metabolic-risk-a-compositional-isotemporal-substitution-analysis
#4
D Dumuid, L K Lewis, T S Olds, C Maher, C Bondarenko, L Norton
OBJECTIVE: Older adults' health has been linked with time in moderate-to-vigorous physical activity (MVPA), and recent studies suggest time in sedentary behaviour may also be important. Time-use behaviours (MVPA, light physical activity, sedentary time and sleep) are co-dependent, and therefore their associations with health should be examined in an integrated manner. This is the first study to investigate the relationship between older adults' reallocation of time among these time-use behaviours and markers of cardio-respiratory fitness, obesity and cardio-metabolic risk...
April 2018: Maturitas
https://www.readbyqxmd.com/read/29509832/using-heart-rate-and-accelerometry-to-define-quantity-and-intensity-of-physical-activity-in-older-adults
#5
Jennifer A Schrack, Andrew Leroux, Jerome L Fleg, Vadim Zipunnikov, Eleanor M Simonsick, Stephanie A Studenski, Ciprian Crainiceanu, Luigi Ferrucci
Background: Physical activity (PA) prevents disease and promotes longevity; yet, few older adults meet the recommended daily guidelines. Wearable PA and heart rate monitors provide the opportunity to define age-related differences in the absolute and relative intensity of daily activities, and provide insight into the underlying factors influencing PA in older adults. Methods : Participants in the Baltimore Longitudinal Study of Aging (n = 440, 52% male, aged 31 to 88 years) completed a clinical assessment and wore an Actiheart monitor in the free-living environment...
April 17, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29413794/gait-adaptations-of-older-adults-on-an-uneven-brick-surface-can-be-predicted-by-age-related-physiological-changes-in-strength
#6
P C Dixon, K H Schütte, B Vanwanseele, J V Jacobs, J T Dennerlein, J M Schiffman
BACKGROUND: Outdoor falls in community-dwelling older adults are often triggered by uneven pedestrian walkways. It remains unclear how older adults adapt to uneven surfaces typically encountered in the outdoor built-environment and whether these adaptations are associated to age-related physiological changes. RESEARCH QUESTION: The aims of this study were to (1) compare gait parameters over uneven and flat brick walkways, (2) evaluate the differences between older and young adults for these two surfaces, and (3) assess if physiological characteristics could predict adaptations in older adults...
March 2018: Gait & Posture
https://www.readbyqxmd.com/read/29372585/life-space-assessment-questionnaire-novel-measurement-properties-for-brazilian-community-dwelling-older-adults
#7
Maria do Socorro Mp Simões, Isabel Ff Garcia, Lucíola da Cm Costa, Adriana C Lunardi
AIM: The Life-Space Assessment (LSA) assesses mobility from the spaces that older adults go, and how often and how independent they move. Despite its increased use, LSA measurement properties remain unclear. The aim of the present study was to analyze the content validity, reliability, construct validity and interpretability of the LSA for Brazilian community-dwelling older adults. METHODS: In this clinimetric study we analyzed the measurement properties (content validity, reliability, construct validity and interpretability) of the LSA administered to 80 Brazilian community-dwelling older adults...
January 26, 2018: Geriatrics & Gerontology International
https://www.readbyqxmd.com/read/29248628/systematic-review-of-smartphone-based-passive-sensing-for-health-and-wellbeing
#8
REVIEW
Victor P Cornet, Richard J Holden
OBJECTIVE: To review published empirical literature on the use of smartphone-based passive sensing for health and wellbeing. MATERIAL AND METHODS: A systematic review of the English language literature was performed following PRISMA guidelines. Papers indexed in computing, technology, and medical databases were included if they were empirical, focused on health and/or wellbeing, involved the collection of data via smartphones, and described the utilized technology as passive or requiring minimal user interaction...
January 2018: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/29218808/the-feasibility-and-acceptability-of-a-physical-activity-intervention-for-older-people-with-chronic-musculoskeletal-pain-the-ipopp-pilot-trial-protocol
#9
E L Healey, C Jinks, N E Foster, C A Chew-Graham, T Pincus, L Hartshorne, K Cooke, E Nicholls, J Proctor, M Lewis, S Dent, S Wathall, E M Hay, J McBeth
INTRODUCTION: This pilot trial will inform the design and methods of a future full-scale randomized controlled trial (RCT) and examine the feasibility, acceptability and fidelity of the Increasing Physical activity in Older People with chronic Pain (iPOPP) intervention, a healthcare assistant (HCA)-supported intervention to promote walking in older adults with chronic musculoskeletal pain in a primary care setting. METHODS AND ANALYSIS: The iPOPP study is an individually randomized, multicentre, three-parallel-arm pilot RCT...
March 2018: Musculoskeletal Care
https://www.readbyqxmd.com/read/29214834/source-and-size-of-social-support-network-on-sedentary-behavior-among-older-adults
#10
Paul D Loprinzi, Elizabeth A Crush
PURPOSE: To examine the association of source of social support and size of social support network on sedentary behavior among older adults. DESIGN: Cross-sectional. SETTING: National Health and Nutrition Examination Survey 2003 to 2006. PARTICIPANTS: 2519 older adults (60+ years). MEASURES: Sedentary behavior was assessed via accelerometry over a 7-day period. Social support was assessed via self-report...
January 2018: American Journal of Health Promotion: AJHP
https://www.readbyqxmd.com/read/29197830/association-of-accelerometry-measured-physical-activity-and-cardiovascular-events-in-mobility-limited-older-adults-the-life-lifestyle-interventions-and-independence-for-elders-study
#11
Shannon K Cochrane, Shyh-Huei Chen, Jodi D Fitzgerald, John A Dodson, Roger A Fielding, Abby C King, Mary M McDermott, Todd M Manini, Anthony P Marsh, Anne B Newman, Marco Pahor, Catrine Tudor-Locke, Walter T Ambrosius, Thomas W Buford
BACKGROUND: Data are sparse regarding the value of physical activity (PA) surveillance among older adults-particularly among those with mobility limitations. The objective of this study was to examine longitudinal associations between objectively measured daily PA and the incidence of cardiovascular events among older adults in the LIFE (Lifestyle Interventions and Independence for Elders) study. METHODS AND RESULTS: Cardiovascular events were adjudicated based on medical records review, and cardiovascular risk factors were controlled for in the analysis...
December 2, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29155839/performance-of-thigh-mounted-triaxial-accelerometer-algorithms-in-objective-quantification-of-sedentary-behaviour-and-physical-activity-in-older-adults
#12
Jorgen A Wullems, Sabine M P Verschueren, Hans Degens, Christopher I Morse, Gladys L Onambélé
Accurate monitoring of sedentary behaviour and physical activity is key to investigate their exact role in healthy ageing. To date, accelerometers using cut-off point models are most preferred for this, however, machine learning seems a highly promising future alternative. Hence, the current study compared between cut-off point and machine learning algorithms, for optimal quantification of sedentary behaviour and physical activity intensities in the elderly. Thus, in a heterogeneous sample of forty participants (aged ≥60 years, 50% female) energy expenditure during laboratory-based activities (ranging from sedentary behaviour through to moderate-to-vigorous physical activity) was estimated by indirect calorimetry, whilst wearing triaxial thigh-mounted accelerometers...
2017: PloS One
https://www.readbyqxmd.com/read/29106478/the-relationship-between-physical-activity-and-frailty-among-u-s-older-adults-based-on-hourly-accelerometry-data
#13
Megan Huisingh-Scheetz, Kristen Wroblewski, Masha Kocherginsky, Elbert Huang, William Dale, Linda Waite, L Philip Schumm
Background/Objectives: Accelerometry measures older adult (in)activity with high resolution. Most studies summarize activity over the entire wear time. We extend prior work by analyzing hourly activity data to determine how frailty and other characteristics relate to activity among older adults. Methods: Using wrist accelerometry data collected from the National Social Life, Health and Aging Project (n = 651), a nationally-representative probability sample of older adults, we used mixed effects linear regression to model the logarithm of hourly counts per minute as a function of an adapted phenotypic frailty score, adjusting for demographic and health characteristics, season, day of week and time of day...
April 17, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29080976/relationships-of-depressive-behavior-and-sertraline-treatment-with-walking-speed-and-activity-in-older-female-nonhuman-primates
#14
Jamie N Justice, Marnie G Silverstein-Metzler, Beth Uberseder, Susan E Appt, Thomas B Clarkson, Thomas C Register, Stephen B Kritchevsky, Carol A Shively
Depression is the most common mental health problem in aging persons and is a leading risk factor for physical disability, especially in women. Though antidepressant drugs such as serotonin reuptake inhibitors (SSRI) are commonly prescribed, epidemiological evidence reveals mixed effects of long-term antidepressant use on physical function and activity, possibly depending on depressive status. The purpose of this preclinical trial was to determine the relationships of depressive behavior and the potential for an SSRI treatment to modulate walking speed and activity patterns in older adult female cynomolgus monkeys (Macaca fascicularis)...
December 2017: GeroScience
https://www.readbyqxmd.com/read/29042429/both-light-intensity-and-moderate-to-vigorous-physical-activity-measured-by-accelerometry-are-favorably-associated-with-cardiometabolic-risk-factors-in-older-women-the-objective-physical-activity-and-cardiovascular-health-opach-study
#15
Michael J LaMonte, Cora E Lewis, David M Buchner, Kelly R Evenson, Eileen Rillamas-Sun, Chongzhi Di, I-Min Lee, John Bellettiere, Marcia L Stefanick, Charles B Eaton, Barbara V Howard, Chloe Bird, Andrea Z LaCroix
BACKGROUND: The relationship between light intensity physical activity (PA), which is common in older adults, and cardiovascular disease (CVD) risk factors is unclear. This study examined associations of accelerometer-measured PA intensity with CVD risk factors in older women of different race-ethnicities. METHODS AND RESULTS: Cross-sectional analyses were conducted in 4832 women (mean age 78.9 years; 52.5% white, 30.5% black, 17.1% Hispanic) who were without known CVD and wore triaxial accelerometers a minimum of 4 of 7 days with ≥10 hours/d awake wear-time...
October 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29026295/systemic-effects-of-chronic-obstructive-pulmonary-disease-in-young-old-adults-life-space-mobility
#16
Isabel Fialho Fontenele Garcia, Carina Tiemi Tiuganji, Maria do Socorro Morais Pereira Simões, Ilka Lopes Santoro, Adriana Claudia Lunardi
PURPOSE: The objective was to assess whether dyspnea, peripheral muscle strength and the level of physical activity are correlated with life-space mobility of older adults with COPD. PATIENTS AND METHODS: Sixty patients over 60 years of age (40 in the COPD group and 20 in the control group) were included. All patients were evaluated for lung function (spirometry), life-space mobility (University of Alabama at Birmingham Study of Aging Life-Space Assessment), dyspnea severity (Modified Dyspnea Index), peripheral muscle strength (handgrip dynamometer), level of physical activity and number of daily steps (accelerometry)...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28977340/evaluating-accelerometry-thresholds-for-detecting-changes-in-levels-of-moderate-physical-activity-and-resulting-major-mobility-disability
#17
W Jack Rejeski, Michael P Walkup, Roger A Fielding, Abby C King, Todd Manini, Anthony P Marsh, Mary McDermott, Emily Y Miller, Anne B Newman, Catrine Tudor-Locke, Robert S Axtell, Michael E Miller
Background: An important decision with accelerometry is the threshold in counts per minute (CPM) used to define moderate to vigorous physical activity (MVPA). We explore the ability of different thresholds to track changes in MVPA due to a physical activity (PA) intervention among older adults with compromised function: 760 CPM, 1,041 CPM, and an individualized threshold. We also evaluate the ability of change in accelerometry and self-reported PA to attenuate treatment effects on major mobility disability (MMD)...
April 17, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28958000/validation-of-gait-characteristics-extracted-from-raw-accelerometry-during-walking-against-measures-of-physical-function-mobility-fatigability-and-fitness
#18
Jacek K Urbanek, Vadim Zipunnikov, Tamara Harris, Ciprian Crainiceanu, Jaroslaw Harezlak, Nancy W Glynn
Background: Data collected by wearable accelerometry devices can be used to identify periods of sustained harmonic walking. This report aims to establish whether the features of walking identified in the laboratory and free-living environments are associated with each other as well as measures of physical function, mobility, fatigability, and fitness. Methods: Fifty-one older adults (mean age 78.31) enrolled in the Developmental Epidemiologic Cohort Study were included in the analyses...
April 17, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28942611/global-sensory-impairment-predicts-morbidity-and-mortality-in-older-u-s-adults
#19
Jayant M Pinto, Kristen E Wroblewski, Megan Huisingh-Scheetz, Camil Correia, Kevin J Lopez, Rachel C Chen, David W Kern, Philip L Schumm, William Dale, Martha K McClintock
OBJECTIVES: To evaluate global sensory impairment (GSI, an integrated measure of sensory dysfunction) as a predictor of physical function, cognition, overall health, and mortality. DESIGN: Prospective study. SETTING: The National Social Life, Health, and Aging Project. PARTICIPANTS: A national probability sample of 3,005 home-dwelling older U.S. adults assessed at baseline (2005-06) and 5-year follow-up (2010-11). MEASUREMENTS: Gait speed, activity, disability, cognition, overall health, 5-year mortality...
December 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28820909/dose-of-physical-activity-physical-functioning-and-disability-risk-in-mobility-limited-older-adults-results-from-the-life-study-randomized-trial
#20
RANDOMIZED CONTROLLED TRIAL
Roger A Fielding, Jack M Guralnik, Abby C King, Marco Pahor, Mary M McDermott, Catrine Tudor-Locke, Todd M Manini, Nancy W Glynn, Anthony P Marsh, Robert S Axtell, Fang-Chi Hsu, W Jack Rejeski
Understanding the minimal dose of physical activity required to achieve improvement in physical functioning and reductions in disability risk is necessary to inform public health recommendations. To examine the effect of physical activity dose on changes in physical functioning and the onset of major mobility disability in The Lifestyle Interventions and Independence for Elders (LIFE) Study. We conducted a multicenter single masked randomized controlled trial that enrolled participants in 2010 and 2011 and followed them for an average of 2...
2017: PloS One
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