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Validation of accelerometers

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https://www.readbyqxmd.com/read/29773575/measuring-physical-activity-with-implanted-cardiac-devices-a-systematic-review
#1
Lindsey Rosman, Rachel Lampert, Samuel F Sears, Matthew M Burg
BACKGROUND: Physical activity is predictive of cardiovascular outcomes in patients with cardiovascular implantable electronic devices, yet it is not regularly assessed in routine care. Current-generation cardiovascular implantable electronic devices, however, continuously monitor patient activity through a built-in accelerometer, which provides new opportunities to remotely assess patient activity, detect changes in clinical status, and incorporate these data in risk stratification models...
May 17, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29743076/the-daily-mile-makes-primary-school-children-more-active-less-sedentary-and-improves-their-fitness-and-body-composition-a-quasi-experimental-pilot-study
#2
Ross A Chesham, Josephine N Booth, Emma L Sweeney, Gemma C Ryde, Trish Gorely, Naomi E Brooks, Colin N Moran
BACKGROUND: The Daily Mile is a physical activity programme made popular by a school in Stirling, Scotland. It is promoted by the Scottish Government and is growing in popularity nationally and internationally. The aim is that each day, during class time, pupils run or walk outside for 15 min (~1 mile) at a self-selected pace. It is anecdotally reported to have a number of physiological benefits including increased physical activity, reduced sedentary behaviour, increased fitness and improved body composition...
May 10, 2018: BMC Medicine
https://www.readbyqxmd.com/read/29739383/validation-of-the-npaq-short-a-brief-questionnaire-to-monitor-physical-activity-and-compliance-with-the-who-recommendations
#3
Ida Høgstedt Danquah, Christina Bjørk Petersen, Sofie Smedegaard Skov, Janne S Tolstrup
BACKGROUND: Using self-reported surveys to monitor physical activity levels in the population require short items covering both time and intensity. The present study aims to 1) develop the Nordic Physical Activity Questionnaire-short from the original version of the NPAQ, 2) assess test-retest reliability and criterion validity of the NPAQ-short, and 3) test the NPAQ-short's ability to monitor compliance with the WHO recommendations on physical activity. In addition, we aimed to compare open and closed-ended answering modes for the NPAQ-short...
May 8, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29734712/sedentary-behaviour-in-swiss-children-and-adolescents-disentangling-associations-with-the-perceived-and-objectively-measured-environment
#4
Bettina Bringolf-Isler, Kees de Hoogh, Christian Schindler, Bengt Kayser, L Suzanne Suggs, Alain Dössegger, Nicole Probst-Hensch
Identifying correlates of sedentary behaviour across all levels of the ecological model and understanding their interrelations is a promising method to plan effective interventions. The present study examined whether the objectively assessed and the perceived neighbourhood are associated with children’s sedentary behaviour time (SBT). A comprehensive set of factors at different levels of influence across the ecological model were taken into account and analysed for mediating and modifying effects...
May 4, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29734344/performance-of-a-wearable-acoustic-system-for-fetal-movement-discrimination
#5
Jonathan Lai, Richard Woodward, Yuriy Alexandrov, Qurratul Ain Munnee, Christoph C Lees, Ravi Vaidyanathan, Niamh C Nowlan
Fetal movements (FM) are a key factor in clinical management of high-risk pregnancies such as fetal growth restriction. While maternal perception of reduced FM can trigger self-referral to obstetric services, maternal sensation is highly subjective. Objective, reliable monitoring of fetal movement patterns outside clinical environs is not currently possible. A wearable and non-transmitting system capable of sensing fetal movements over extended periods of time would be extremely valuable, not only for monitoring individual fetal health, but also for establishing normal levels of movement in the population at large...
2018: PloS One
https://www.readbyqxmd.com/read/29724191/reliability-and-validity-of-two-fitness-tracker-devices-in-the-laboratory-and-home-environment-for-older-community-dwelling-people
#6
Elissa Burton, Keith D Hill, Nicola T Lautenschlager, Cecilie Thøgersen-Ntoumani, Gill Lewin, Eileen Boyle, Erin Howie
BACKGROUND: Two-thirds of older Australians are sedentary. Fitness trackers have been popular with younger people and may encourage older adults to become more active. Older adults may have different gait patterns and as such it is important to establish whether fitness trackers are valid and reliable for this population. The aim of the study was to test the reliability and validity of two fitness trackers (Fitbit Flex and ChargeHR) by step count when worn by older adults. Reliability and validity were tested in two conditions: 1) in the laboratory using a two-minute-walk-test (2MWT) and 2) in a free-living environment...
May 3, 2018: BMC Geriatrics
https://www.readbyqxmd.com/read/29708870/validation-of-freezing-of-gait-monitoring-using-smartphone
#7
Han Byul Kim, Hong Ji Lee, Woong Woo Lee, Sang Kyong Kim, Hyo Seon Jeon, Hye Young Park, Chae Won Shin, Won Jin Yi, Beomseok Jeon, Kwang S Park
BACKGROUND: Freezing of gait (FOG) is a commonly observed motor symptom for patients with Parkinson's disease (PD). The symptoms of FOG include reduced step lengths or motor blocks, even with an evident intention of walking. FOG should be monitored carefully because it not only lowers the patient's quality of life, but also significantly increases the risk of injury. INTRODUCTION: In previous studies, patients had to wear several sensors on the body and another computing device was needed to run the FOG detection algorithm...
April 30, 2018: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/29706696/the-known-groups-validity-of-intensity-based-physical-activity-measurement-using-an-accelerometer-in-people-with-subacute-stroke
#8
Natsuki Shimizu, Hiroyuki Hashidate, Tomohiro Ota, Akihiko Saito
[Purpose] This study aimed to assess the known-groups validity of the estimated metabolic equivalents during physical activities using accelerometer, Active Style Pro HJA 350-IT, in people with subacute stroke. [Subjects and Methods] Ten participants with subacute stroke and ten healthy people performed six activities (lying, sitting, standing, sitting with reaching task, standing with reaching task, and walking) and metabolic equivalents were estimated using the accelerometer during each activity. These estimated metabolic equivalents were compared with reported metabolic equivalents through compendiums or previous studies...
April 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29705427/use-of-novel-sensors-combining-local-positioning-and-acceleration-to-measure-feeding-behavior-differences-associated-with-lameness-in-dairy-cattle
#9
Z E Barker, J A Vázquez Diosdado, E A Codling, N J Bell, H R Hodges, D P Croft, J R Amory
Time constraints for dairy farmers are an important factor contributing to the under-detection of lameness, resulting in delayed or missed treatment of lame cows within many commercial dairy herds. Hence, a need exists for flexible and affordable cow-based sensor systems capable of monitoring behaviors such as time spent feeding, which may be affected by the onset of lameness. In this study a novel neck-mounted mobile sensor system that combines local positioning and activity (acceleration) was tested and validated on a commercial UK dairy farm...
April 25, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29703964/opto-mechanical-lab-on-fibre-seismic-sensors-detected-the-norcia-earthquake
#10
Marco Pisco, Francesco Antonio Bruno, Danilo Galluzzo, Lucia Nardone, Grzegorz Gruca, Niek Rijnveld, Francesca Bianco, Antonello Cutolo, Andrea Cusano
We have designed and developed lab-on-fibre seismic sensors containing a micro-opto-mechanical cavity on the fibre tip. The mechanical cavity is designed as a double cantilever suspended on the fibre end facet and connected to a proof mass to tune its response. Ground acceleration leads to displacement of the cavity length, which in turn can be remotely detected using an interferometric interrogation technique. After the sensors characterization, an experimental validation was conducted at the Italian National Institute of Geophysics and Volcanology (INGV), which is responsible for seismic surveillance over the Italian country...
April 27, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29701721/improving-fall-detection-using-an-on-wrist-wearable-accelerometer
#11
Samad Barri Khojasteh, José R Villar, Camelia Chira, Víctor M González, Enrique de la Cal
Fall detection is a very important challenge that affects both elderly people and the carers. Improvements in fall detection would reduce the aid response time. This research focuses on a method for fall detection with a sensor placed on the wrist. Falls are detected using a published threshold-based solution, although a study on threshold tuning has been carried out. The feature extraction is extended in order to balance the dataset for the minority class. Alternative models have been analyzed to reduce the computational constraints so the solution can be embedded in smart-phones or smart wristbands...
April 26, 2018: Sensors
https://www.readbyqxmd.com/read/29701486/can-an-automated-sleep-detection-algorithm-for-waist-worn-accelerometry-replace-sleep-logs
#12
Tiago V Barreira, Jessica G Redmond, Tom D Brutsaert, John M Schuna, Emily F Mire, Peter T Katzmarzyk, Catrine Tudor-Locke
The purpose of this study was to test whether estimates of bedtime, wake time, and sleep period time (SPT) were comparable between an automated algorithm (ALG) applied to waist-worn accelerometry data and a sleep log (LOG), in an adult sample. A total of 104 participants were asked to log evening bedtime and morning wake time and wear an ActiGraph GT3X+ accelerometer at their waist 24 h/days for 7 consecutive days. Mean difference (MD) and mean absolute difference (MAD) were computed. Pearson correlations and dependent sample t-tests were used to compare LOG-based and ALG-based sleep variables...
April 27, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29701258/evaluation-of-smartphone-based-testing-to-generate-exploratory-outcome-measures-in-a-phase-1-parkinson-s-disease-clinical-trial
#13
Florian Lipsmeier, Kirsten I Taylor, Timothy Kilchenmann, Detlef Wolf, Alf Scotland, Jens Schjodt-Eriksen, Wei-Yi Cheng, Ignacio Fernandez-Garcia, Juliane Siebourg-Polster, Liping Jin, Jay Soto, Lynne Verselis, Frank Boess, Martin Koller, Michael Grundman, Andreas U Monsch, Ronald B Postuma, Anirvan Ghosh, Thomas Kremer, Christian Czech, Christian Gossens, Michael Lindemann
BACKGROUND: Ubiquitous digital technologies such as smartphone sensors promise to fundamentally change biomedical research and treatment monitoring in neurological diseases such as PD, creating a new domain of digital biomarkers. OBJECTIVES: The present study assessed the feasibility, reliability, and validity of smartphone-based digital biomarkers of PD in a clinical trial setting. METHODS: During a 6-month, phase 1b clinical trial with 44 Parkinson participants, and an independent, 45-day study in 35 age-matched healthy controls, participants completed six daily motor active tests (sustained phonation, rest tremor, postural tremor, finger-tapping, balance, and gait), then carried the smartphone during the day (passive monitoring), enabling assessment of, for example, time spent walking and sit-to-stand transitions by gyroscopic and accelerometer data...
April 27, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29695250/effectiveness-of-the-girls-active-school-based-physical-activity-programme-a-cluster-randomised-controlled-trial
#14
Deirdre M Harrington, Melanie J Davies, Danielle H Bodicoat, Joanna M Charles, Yogini V Chudasama, Trish Gorely, Kamlesh Khunti, Tatiana Plekhanova, Alex V Rowlands, Lauren B Sherar, Rhiannon Tudor Edwards, Thomas Yates, Charlotte L Edwardson
BACKGROUND: Globally, adolescent girls' physical activity (PA) levels are low. The 'Girls Active' secondary school-based programme, developed by the Youth Sport Trust, aims to increase PA in adolescent girls. This paper explores the effectiveness of the 'Girls Active' school-based PA programme. METHODS: A random sample of girls aged 11-14 from 20 secondary schools (Midlands, UK) participated in a two-arm cluster randomised controlled trial. Ten schools received Girls Active and 10 continued with usual practice...
April 25, 2018: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/29691130/detection-of-daily-postures-and-walking-modalities-using-a-single-chest-mounted-tri-axial-accelerometer
#15
Milad Nazarahari, Hossein Rouhani
This study presents a novel method for the detection and classification of a wide range of physical activities, including standing, sitting, lying, level walking, and walking upstairs and downstairs using a single chest-mounted accelerometer. The trunk inclination angle and variation of the gravitational component of the accelerometer recording were used for detection and classification of postural transitions and walking modalities. In addition, biomechanical features of each transition were used to reject false detections...
April 21, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29687190/monitoring-healthy-and-disturbed-sleep-through-smartphone-applications-a-review-of-experimental-evidence
#16
REVIEW
Edita Fino, Michela Mazzetti
Smartphone applications are considered as the prime candidate for the purposes of large-scale, low-cost and long-term sleep monitoring. How reliable and scientifically grounded is smartphone-based assessment of healthy and disturbed sleep remains a key issue in this direction. Here we offer a review of validation studies of sleep applications to the aim of providing some guidance in terms of their reliability to assess sleep in healthy and clinical populations, and stimulating further examination of their potential for clinical use and improved sleep hygiene...
April 23, 2018: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29686939/development-of-harmaline-induced-tremor-in-a-swine-model
#17
Jihyun Lee, Inyong Kim, Jeyeon Lee, Emily Knight, Lei Cheng, Shin Il Kang, Dong Pyo Jang, Su-Youne Chang
Background: In the field of translational neuroscience research, it is critical to utilize a large animal model to test the feasibility, safety, and functionality of novel therapies. Here, we describe a protocol for the development of a large animal model of tremor. Methods: In a pig model, tremor was induced with harmaline and measured with wireless accelerometers attached to the limbs. Three different doses of harmaline were tested and three repetitive injections were made at 72-hour intervals...
2018: Tremor and Other Hyperkinetic Movements
https://www.readbyqxmd.com/read/29683922/a-review-of-accelerometer-based-activity-monitoring-in-cancer-survivorship-research
#18
Carolyn J Peddle-McIntyre, Vinicius Cavalheri, Terry Boyle, Joanne A McVeigh, Emily Jeffery, Brigid M Lynch, Jeff K Vallance
BACKGROUND: In the cancer survivorship context, physical activity and sedentary behaviour have been measured using different methods and tools. PURPOSE: To conduct a narrative review of published research in cancer survivor populations to summarise the quality and identify gaps in reporting on accelerometer data collection, data processing, and outcome measures in cancer survivors. METHODS: An initial PubMed® search of papers published in English was conducted in January 2017, and a final search was conducted in May 2017...
April 21, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29673201/iot-on-board-system-for-driving-style-assessment
#19
Bartosz Jachimczyk, Damian Dziak, Jacek Czapla, Pawel Damps, Wlodek J Kulesza
The assessment of skills is essential and desirable in areas such as medicine, security, and other professions where mental, physical, and manual skills are crucial. However, often such assessments are performed by people called “experts” who may be subjective and are able to consider a limited number of factors and indicators. This article addresses the problem of the objective assessment of driving style independent of circumstances. The proposed objective assessment of driving style is based on eight indicators, which are associated with the vehicle’s speed, acceleration, jerk, engine rotational speed and driving time...
April 17, 2018: Sensors
https://www.readbyqxmd.com/read/29672534/reliability-and-validity-of-the-international-physical-activity-questionnaire-compared-to-calibrated-accelerometer-cut-off-points-in-the-quantification-of-sedentary-behaviour-and-physical-activity-in-older-adults
#20
Declan J Ryan, Jorgen A Wullems, Georgina K Stebbings, Christopher I Morse, Claire E Stewart, Gladys L Onambele-Pearson
BACKGROUND: The aim was to determine the reliability and validity of IPAQ measured sedentary behaviour (SB) and moderate-vigorous physical activity (MVPA) in older persons whilst examining any sex differences in reliability and validity results. METHOD: 89 participants (73.7 ± 6.3 years, 54% female) completed the IPAQ. Participants were fitted with a thigh mounted triaxial accelerometer (GeneActiv Original) for seven consecutive days and subsequently completed a second IPAQ...
2018: PloS One
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