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Nathalie M Berninger, Gill A Ten Hoor, Guy Plasqui
Sedentary behavior (SB) has detrimental consequences and cannot be compensated for through moderate-to-vigorous physical activity (PA). In order to understand and mitigate SB, tools for measuring and monitoring SB are essential. While current direct-to-customer wearables focus on PA, the VitaBit validated in this study was developed to focus on SB. It was tested in a laboratory and in a free-living condition, comparing it to direct observation and to a current best-practice device, the ActiGraph, on a minute-by-minute basis...
March 15, 2018: Sensors
Sarah A Amin, Paula J Duquesnay, Catherine M Wright, Kenneth Chui, Christina D Economos, Jennifer M Sacheck
PURPOSE: Socioeconomic status (SES) may impact children's physical activity (PA) behaviors and confidence to participate in PA. We examined how SES modifies the relationship between children's perceived athletic competence (PAC) and moderate to vigorous PA (MVPA). METHODS: Children (N = 1157; 45% male; grades 3-4) were recruited for the Fueling Learning through Exercise study. Free/reduced price lunch eligibility was used as an indicator of SES. Seven-day accelerometry (ActiGraph GT3X+) was used to measure daily MVPA, out-of-school MVPA (O-MVPA), and school-time MVPA...
March 15, 2018: Pediatric Exercise Science
Myles W O'Brien, William R Wojcik, Lisette D'Entremont, Jonathon R Fowles
The purpose of the study was to: 1) Validate the PiezoRx® for steps and intensity related physical activity in free-living conditions compared to the criterion measure. 2) Compare PiezoRx®'s steps and intensity related physical activity to physiological assessments. 3) To assess the utility of the PiezoRx® in a subsample of participants. Thirty-nine participants consisting of 28 females aged 54.9±10.6 (33-74) years and 11 males aged 63.9±10.9 (44-80) years wore the PiezoRx® physical activity monitor and the ActiGraph® accelerometer for one full week and completed a physical assessment...
2018: International Journal of Exercise Science
Bunny J Pozehl, Rita Mcguire, Kathleen Duncan, Melody Hertzog, Pallav Deka, Joseph Norman, Nancy T Artinian, Matthew A Saval, Steven J Keteyian
BACKGROUND: Few studies report objective accelerometer-measured daily physical activity levels in patients with heart failure (HF). OBJECTIVE: We examined baseline accelerometer-measured physical activity from the Heart Failure Exercise and Resistance Training Camp trial, a federally funded (R01-HL112979) 18-month intervention study to promote adherence to exercise in patients with HF. Factors associated with physical activity levels were also explored. METHODS: Patients with diagnosed HF (stage C chronic HF confirmed by echocardiography and clinical evaluation) were recruited from 2 urban medical centers...
March 12, 2018: Journal of Cardiovascular Nursing
Chandrasekaran Jayaraman, Chaithanya Krishna Mummidisetty, Alannah Mannix-Slobig, Lori McGee Koch, Arun Jayaraman
BACKGROUND: Monitoring physical activity and leveraging wearable sensor technologies to facilitate active living in individuals with neurological impairment has been shown to yield benefits in terms of health and quality of living. In this context, accurate measurement of physical activity estimates from these sensors are vital. However, wearable sensor manufacturers generally only provide standard proprietary algorithms based off of healthy individuals to estimate physical activity metrics which may lead to inaccurate estimates in population with neurological impairment like stroke and incomplete spinal cord injury (iSCI)...
March 13, 2018: Journal of Neuroengineering and Rehabilitation
L B McMillan, D Aitken, P Ebeling, G Jones, D Scott
Relationships between objectively assessed free-living physical activity (PA) and changes in bone health over time are poorly understood in older adults. This study suggests these relationships are sex-specific and that body composition may influence the mechanical loading benefits of PA. INTRODUCTION: To investigate associations of objectively assessed PA and bone health in community-dwelling older adults. METHODS: This secondary analysis of a subset of the Tasmanian Older Adult Cohort study included participants with PA assessed utilising ActiGraph GT1M accelerometers over 7 days (N = 209 participants, 53% female; mean ± SD age 64...
March 12, 2018: Osteoporosis International
Anne-Katrine F Bundgaard, Jette Asmussen, Nadia S Pedersen, Niels Bilenberg
This study investigated whether early signs of attention deficit hyperactivity disorder (ADHD) in toddlers aged 2-3 years are associated with disturbed sleep and activity levels. Participants were recruited from the Odense Child Cohort, and children scoring above the 93rd percentile on the ADHD scale of the Child Behaviour Checklist 1½-5 were categorised as cases and compared with age- and gender-matched normal-scoring controls. Daytime and nocturnal activity for 24 children with ADHD traits (cases) and 25 healthy controls was assessed through 7 days of actigraphy, and parents completed the Children's Sleep Habits Questionnaire (CSHQ) and the ADHD Rating Scale IV Preschool Version (ADHD-RS)...
March 12, 2018: Journal of Sleep Research
Lena L Law, Rachael N Rol, Stephanie A Schultz, Ryan J Dougherty, Dorothy F Edwards, Rebecca L Koscik, Catherine L Gallagher, Cynthia M Carlsson, Barbara B Bendlin, Henrik Zetterberg, Kaj Blennow, Sanjay Asthana, Mark A Sager, Bruce P Hermann, Sterling C Johnson, Dane B Cook, Ozioma C Okonkwo
Introduction: Alzheimer's disease (AD) is characterized by the presence of amyloid β (Aβ) plaques, neurofibrillary tangles, and neurodegeneration, evidence of which may be detected in vivo via cerebrospinal fluid (CSF) sampling. Physical activity (PA) has emerged as a possible modifier of these AD-related pathological changes. Consequently, the aim of this study was to cross-sectionally examine the relationship between objectively measured PA and CSF levels of Aβ42 and tau in asymptomatic late-middle-aged adults at risk for AD...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
Marco Filardi, Fabio Pizza, Elena Antelmi, Raffaele Ferri, Vincenzo Natale, Giuseppe Plazzi
Study Objectives: Sodium oxybate (SXB) is a GABAergic agent widely used as off-label treatment in pediatric type 1 narcolepsy (NT1). Here we aimed at analyzing by wrist actigraphy the sleep/wake profile of NT1 children and adolescents in drug-naïve condition and after 1 year of SXB treatment. As secondary aim, we investigated changes on sleepiness, cataplexy and children's anthropometric profile after 1 year of SXB treatment. Methods: Twenty-four drug-naïve NT1 children underwent seven days of actigraphy during the school week...
March 7, 2018: Sleep
Scott E Crouter, Jennifer Flynn Oody, David R Bassett
This study developed and validated a vector magnitude (VM) two-regression model (2RM) for use with an ankle-worn ActiGraph accelerometer. For model development, 181 youth (mean ± SD; age, 12.0 ± 1.5 yr) completed 30 min of supine rest and 2-7 structured activities. For cross-validation, 42 youth (age, 12.6 ± 0.8 yr) completed approximately 2 hr of unstructured physical activity (PA). PA data were collected using an ActiGraph accelerometer, (non-dominant ankle) and the VM was expressed as counts/5-s...
March 8, 2018: Journal of Sports Sciences
Bronwyn K Clark, Elisabeth A Winkler, Charlotte L Brakenridge, Stewart G Trost, Genevieve N Healy
BACKGROUND: Most wearable devices that measure movement in workplaces cannot determine the context in which people spend time. This study examined the accuracy of Bluetooth sensing (10-second intervals) via the ActiGraph GT9X Link monitor to determine location in an office setting, using two simple, bespoke algorithms. METHODS: For one work day (mean±SD 6.2±1.1 hours), 30 office workers (30% men, aged 38±11 years) simultaneously wore chest-mounted cameras (video recording) and Bluetooth-enabled monitors (initialised as receivers) on the wrist and thigh...
2018: PloS One
Małgorzata Mizgier, Kinga Mruczyk, Grazyna Jarząbek-Bielecka, Jan Jeszka
OBJECTIVES: The goal of the paper was to compare weight gain in pregnant women in relation to the week of gestation at birth, the delivery method, and the occurrence of macrosomia and low birth weights for patients with different durations of physical activity during pregnancy. MATERIALS AND METHODS: The full course of study was completed by 57 pregnant women enrolled in an 18-week physical activity programme during their second and third trimesters. The actual duration of their physical activity was monitored with the ActiGraph GT3X monitor...
2018: Ginekologia Polska
Eivind Aadland, Lars Bo Andersen, Sigmund Alfred Anderssen, Geir Kåre Resaland
BACKGROUND: There are many unresolved issues regarding data reduction algorithms for accelerometry. The choice of criterion for removal of non-wear time might have a profound influence on physical activity (PA) and sedentary time (SED) estimates. The aim of the present study was to compare 10 different non-wear criteria and a log of non-wear periods in 11-year-old children. METHODS: Children from the Active Smarter Kids study performed 7-days of hip-worn accelerometer monitoring (Actigraph GT3X+) and logged the number of non-wear periods each day, along with the approximate duration and reason for non-wear...
March 6, 2018: BMC Public Health
Kyle N Winfree, Gregory Dominick
Consumer-grade wearable activity devices such as Fitbits are increasingly being used in research settings to promote physical activity (PA) due to their low-cost and widespread popularity. However, Fitbit-derived measures of activity intensity are consistently reported to be less accurate than intensity estimates obtained from research-grade accelerometers (i.e., ActiGraph). As such, the potential for using a Fitbit to measure PA intensity within research contexts remains limited. This study aims to model ActiGraph-based intensity estimates from the validated Freedson vector magnitude (VM3) algorithm using measures of steps, metabolic equivalents, and intensity levels obtained from Fitbit...
March 2018: IEEE Journal of Biomedical and Health Informatics
Chang Xu, Minghui Quan, Hanbin Zhang, Chenglin Zhou, PeiJie Chen
Purpose: This study examined the associations of physical activity levels between parents and their pre-school children based on gender and weekday/weekend. Method: A total of 247 parent-preschool child triads from Shanghai, China were analyzed. The children had a mean age of 57.5 ± 5.2 months. Both sedentary behavior and physical activity were measured in all participants using an ActiGraph GT3X+ accelerometer over seven consecutive days from Monday through the following Sunday...
2018: PeerJ
Stephanie A Prince, Robert D Reid, Jordan Bernick, Anna E Clarke, Jennifer L Reed
OBJECTIVES: To compare sedentary time (ST) measured by self-report using a single question from the short-form International Physical Activity Questionnaire (SF-IPAQ), 18-items from the Sedentary Behaviour Questionnaire (SBQ) and objectively using an accelerometer among a large sample of nurses. DESIGN: Cross-sectional. METHODS: Participants wore an ActiGraph GT3X accelerometer (≥4 days, ≥10h/day) and self-reported usual day sitting using the IPAQ and sitting in different modes using the SBQ...
February 8, 2018: Journal of Science and Medicine in Sport
Jennifer L Reed, Stephanie A Prince, Andrew L Pipe, Suzanne Attallah, Kristi B Adamo, Heather E Tulloch, Douglas Manuel, Kerri-Anne Mullen, J George Fodor, Robert D Reid
BACKGROUND: Nurses are the largest professional group within the health care workforce, and their work is perceived as being physically demanding. Regular physical activity helps to prevent or ameliorate cardiometabolic conditions (e.g. cardiovascular disease, diabetes). It is not known whether Canadian nurses are meeting current physical activity guidelines. OBJECTIVE: To assess the influence of the workplace on the physical activity and cardiometabolic health of nurses from hospitals in the Champlain region of Ontario, Canada...
February 13, 2018: International Journal of Nursing Studies
Alyssa M Merbler, Breanne J Byiers, John J Garcia, Timothy J Feyma, Frank J Symons
BACKGROUND: Rett syndrome (RTT) is a neurodevelopmental disorder primarily caused by mutations in the MECP2 gene. Sleep problems are reported by the majority of caregivers of individuals with RTT. METHODS: The present study aimed to replicate and extend previous work about the feasibility of measuring sleep with an actigraph device in a sample of girls with clinically diagnosed RTT (N = 13, mean age = 9 years, 5 months). Participants wore an actigraph device day and night for seven consecutive days...
February 27, 2018: Journal of Neurodevelopmental Disorders
Amparo Díaz-Román, Raziya Mitchell, Samuele Cortese
Sleep alterations associated with adulthood ADHD are poorly understood. Here, we conducted the first meta-analysis of sleep studies in adults with ADHD. Based on a pre-registered protocol (PROSPERO-CRD42017065407), we searched Pubmed, Ovid and Web of Knowledge databases through August 3rd , 2017, with no language or publication type restrictions, and contacted study authors for unpublished data/information. From a pool of 8,812 references, we retained 13 studies. Random-effects models were performed and study quality was rated using the Newcastle-Ottawa Scale...
February 22, 2018: Neuroscience and Biobehavioral Reviews
Louise M Thoma, Dorothy Dunlop, Jing Song, Jungwha Lee, Catrine Tudor-Locke, Elroy J Aguiar, Hiral Master, Meredith B Christiansen, Daniel K White
OBJECTIVE: To compare objectively-measured physical activity (PA) in older adults with symptomatic knee osteoarthritis (SxOA) with similarly aged adults without osteoarthritis (OA) or knee symptoms from the general population. METHODS: We included people age 50-85 years with SxOA from the Osteoarthritis Initiative (OAI, n=491), and people age 50-85 years from the general population from the National Health and Nutrition Examination Survey (NHANES, n=449). A uniaxial accelerometer was worn for >10 hours/day for >4 days in the NHANES in 2003-2004 (Actigraph 7124) and in the OAI in 2008-2010 (Actigraph GT1M)...
February 22, 2018: Arthritis Care & Research
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