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Validation of accelerometers

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https://www.readbyqxmd.com/read/28911278/measurement-of-sedentary-behaviors-or-downtime-in-rett-syndrome
#1
Michelle Stahlhut, Kylie Hill, Anne-Marie Bisgaard, Anne Kjersgaard Jensen, Michaela Andersen, Helen Leonard, Jenny Downs
This study aimed to validate measures of sedentary time in individuals with Rett syndrome. Twenty-six individuals (median [IQR] age 16.0 (9.4-20.6) years) wore an activPAL accelerometer during video-taped activities and agreement was determined between sedentary time determined by the activPAL and observation. For 11 individuals (median [IQR] age 14.5 (11.5-25.6) years), linear regression was used to determine the relationship between sedentary time recorded on the modified Bouchard activity record diary card and measured using the activPAL...
October 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28898295/relationships-between-sleep-duration-physical-activity-and-body-mass-index-in-young-new-zealanders-an-isotemporal-substitution-analysis
#2
Borja Del Pozo-Cruz, Nicholas Gant, Jesús Del Pozo-Cruz, Ralph Maddison
BACKGROUND: The evidence regarding the unique effect of sedentary behaviour on obesity among children is unclear. Moreover, the effect of substituting sedentary behaviour with physical activity of different intensities on the body composition of children has received limited empirical study. OBJECTIVE: To examine the mathematical effects on Body Mass Index (BMI) of substituting sedentary behaviours with physical activities of different intensities on children and youth aged 5-14 years old in New Zealand...
2017: PloS One
https://www.readbyqxmd.com/read/28892192/estimating-activity-of-japanese-macaques-macaca-fuscata-using-accelerometers
#3
John C M Sha, Akihisa Kaneko, Naoko Suda-Hashimoto, Tianmeng He, Makiko Take, Peng Zhang, Goro Hanya
Accelerometers have been used to study both terrestrial and aquatic wildlife, mainly for mammal and bird species. In terrestrial mammals, there is a bias toward ungulates and carnivores, with fewer studies on nonhuman primates. In this study, we tested the use of accelerometers for studying the activity of Japanese macaques (Macaca fuscata). We modeled the activity of a male and a female subject by matching continuous focal observations from video recordings to sensor parameters derived from collar-mounted accelerometers...
September 11, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28882152/impact-of-the-supporting-physical-activity-in-the-childcare-environment-space-intervention-on-preschoolers-physical-activity-levels-and-sedentary-time-a-single-blind-cluster-randomized-controlled-trial
#4
Patricia Tucker, Leigh M Vanderloo, Andrew M Johnson, Shauna M Burke, Jennifer D Irwin, Anca Gaston, Molly Driediger, Brian W Timmons
BACKGROUND: Physical activity levels among preschoolers in childcare are low and sedentary time high. The Supporting Physical Activity in the Childcare Environment (SPACE) intervention had three components: 1. portable play equipment; 2. staff training; and, 3. modified outdoor playtime (i.e., shorter, more frequent periods). This study aimed to examine the effectiveness of the SPACE intervention on preschoolers' physical activity levels and sedentary time during childcare hours (compared to standard care)...
September 7, 2017: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/28878177/authentication-of-smartphone-users-based-on-activity-recognition-and-mobile-sensing
#5
Muhammad Ehatisham-Ul-Haq, Muhammad Awais Azam, Jonathan Loo, Kai Shuang, Syed Islam, Usman Naeem, Yasar Amin
Smartphones are context-aware devices that provide a compelling platform for ubiquitous computing and assist users in accomplishing many of their routine tasks anytime and anywhere, such as sending and receiving emails. The nature of tasks conducted with these devices has evolved with the exponential increase in the sensing and computing capabilities of a smartphone. Due to the ease of use and convenience, many users tend to store their private data, such as personal identifiers and bank account details, on their smartphone...
September 6, 2017: Sensors
https://www.readbyqxmd.com/read/28877186/proof-of-concept-of-a-45-second-cardiorespiratory-fitness-self-test-for-coronary-artery-disease-patients-based-on-accelerometry
#6
Gabriele Papini, Alberto G Bonomi, Wim Stut, Jos J Kraal, Hareld M C Kemps, Francesco Sartor
Cardiorespiratory fitness (CRF) provides important diagnostic and prognostic information. It is measured directly via laboratory maximal testing or indirectly via submaximal protocols making use of predictor parameters such as submaximal [Formula: see text], heart rate, workload, and perceived exertion. We have established an innovative methodology, which can provide CRF prediction based only on body motion during a periodic movement. Thirty healthy subjects (40% females, 31.3 ± 7.8 yrs, 25.1 ± 3.2 BMI) and eighteen male coronary artery disease (CAD) (56...
2017: PloS One
https://www.readbyqxmd.com/read/28870354/the-effect-of-dogs-on-human-sleep-in-the-home-sleep-environment
#7
Salma I Patel, Bernie W Miller, Heidi E Kosiorek, James M Parish, Philip J Lyng, Lois E Krahn
OBJECTIVE: To objectively assess whether a dog in the bedroom or bed disturbs sleep. PARTICIPANTS AND METHODS: From August 1, 2015, through December 31, 2015, we evaluated the sleep of humans and dogs occupying the same bedroom to determine whether this arrangement was conducive to sleep. The study included 40 healthy adults without sleep disorders and their dogs (no dogs <6 months old). Each participant wore an accelerometer and their dog a validated dog accelerometer for 7 nights...
September 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28851348/assessment-of-nutrition-and-physical-activity-environments-in-family-child-care-homes-modification-and-psychometric-testing-of-the-environment-and-policy-assessment-and-observation
#8
Amber E Vaughn, Stephanie Mazzucca, Regan Burney, Truls Østbye, Sara E Benjamin Neelon, Alison Tovar, Dianne S Ward
BACKGROUND: Early care and education (ECE) settings play an important role in shaping the nutrition and physical activity habits of young children. Increasing research attention is being directed toward family child care homes (FCCHs) specifically. However, existing measures of child care nutrition and physical activity environments are limited in that they have been created for use with center-based programs and require modification for studies involving FCCHs. This paper describes the modification of the Environment and Policy Assessment and Observation (EPAO) for use in FCCHs...
August 29, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28841142/validation-of-a-high-sampling-rate-inertial-measurement-unit-for-acceleration-during-running
#9
Thomas Provot, Xavier Chiementin, Emeric Oudin, Fabrice Bolaers, Sébastien Murer
The musculo-skeletal response of athletes to various activities during training exercises has become a critical issue in order to optimize their performance and minimize injuries. However, dynamic and kinematic measures of an athlete's activity are generally limited by constraints in data collection and technology. Thus, the choice of reliable and accurate sensors is crucial for gathering data in indoor and outdoor conditions. The aim of this study is to validate the use of the accelerometer of a high sampling rate ( 1344 Hz ) Inertial Measurement Unit (IMU) in the frame of running activities...
August 25, 2017: Sensors
https://www.readbyqxmd.com/read/28838130/validation-of-photoplethysmography-based-sleep-staging-compared-with-polysomnography-in-healthy-middle-aged-adults
#10
Pedro Fonseca, Tim Weysen, Maaike S Goelema, Els I S Møst, Mustafa Radha, Charlotte Lunsingh Scheurleer, Leonie van den Heuvel, Ronald M Aarts
Study Objectives: To compare the accuracy of automatic sleep staging based on heart rate variability measured from photoplethysmography (PPG) combined with body movements measured with an accelerometer, with polysomnography (PSG) and actigraphy. Methods: Using wrist-worn PPG to analyze heart rate variability and an accelerometer to measure body movements, sleep stages and sleep statistics were automatically computed from overnight recordings. Sleep-wake, 4-class (wake/N1 + N2/N3/REM) and 3-class (wake/NREM/REM) classifiers were trained on 135 simultaneously recorded PSG and PPG recordings of 101 healthy participants and validated on 80 recordings of 51 healthy middle-aged adults...
July 1, 2017: Sleep
https://www.readbyqxmd.com/read/28818819/quantifying-human-movement-using-the-movn-smartphone-app-validation-and-field-study
#11
Ralph Maddison, Luke Gemming, Javier Monedero, Linda Bolger, Sarahjane Belton, Johann Issartel, Samantha Marsh, Artur Direito, Madeleine Solenhill, Jinfeng Zhao, Daniel John Exeter, Harshvardhan Vathsangam, Jonathan Charles Rawstorn
BACKGROUND: The use of embedded smartphone sensors offers opportunities to measure physical activity (PA) and human movement. Big data-which includes billions of digital traces-offers scientists a new lens to examine PA in fine-grained detail and allows us to track people's geocoded movement patterns to determine their interaction with the environment. OBJECTIVE: The objective of this study was to examine the validity of the Movn smartphone app (Moving Analytics) for collecting PA and human movement data...
August 17, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28815146/quantifying-the-relative-change-in-physical-activity-after-total-knee-arthroplasty-using-accelerometer-based-measurements
#12
Vibhu Agarwal, Mathew Smuck, Nigam H Shah
Osteoarthritis is amongst the top five most disabling conditions affecting Americans over 65 years of age and imposes an annual economic burden estimated at $ 89.1 billion. Nearly half of the cost of care of Osteoarthritis is attributable to hospitalizations for total knee arthroplasties (TKA) and total hip arthroplasties (THA). The current clinical practice relies predominantly on subjective assessment of physical function and pain via patient reported outcome measures (PROM) that have proven inadequate for providing a validated, reliable and responsive measure of TKA outcomes...
2017: AMIA Summits on Translational Science Proceedings
https://www.readbyqxmd.com/read/28811317/sleep-duration-and-risk-of-type-2-diabetes
#13
Alicja R Rudnicka, Claire M Nightingale, Angela S Donin, Naveed Sattar, Derek G Cook, Peter H Whincup, Christopher G Owen
BACKGROUND: Associations between sleep duration and type 2 diabetes (T2D) risk markers in childhood have been little studied. We examined associations between self-reported sleep duration and T2D risk markers in children. METHODS: Cross-sectional study of 4525 multiethnic UK children aged 9 to 10 years. Sleep time was calculated from self-reported usual time of going to bed and getting up on a school day, validated in a subset using accelerometers. Fasting blood samples provided levels of serum lipids and insulin, plasma glucose, and HbA1c...
September 2017: Pediatrics
https://www.readbyqxmd.com/read/28809669/muscle-activation-and-inertial-motion-data-for-non-invasive-classification-of-activities-of-daily-living
#14
Michael S Totty, Eric Wade
OBJECTIVE: Remote monitoring of physical activity using body-worn sensors provides an objective alternative to current functional assessment tools. The purpose of this study was to assess the feasibility of classifying categories of activities of daily living from the Functional Arm Activity Behavioral Observation System (FAABOS) using muscle activation and motion data. METHODS: Ten non-disabled, healthy adults were fitted with a Myo armband on the upper forearm...
August 10, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28805751/characterization-of-quadratic-nonlinearity-between-motion-artifact-and-acceleration-data-and-its-application-to-heartbeat-rate-estimation
#15
Sunho Kim, Sungbin Im, Taehyung Park
Accelerometers are applied to various applications to collect information about movements of other sensors deployed at diverse fields ranging from underwater area to human body. In this study, we try to characterize the nonlinear relationship between motion artifact and acceleration data. The cross bicoherence test and the Volterra filter are used as the approaches to detection and modeling. We use the cross bicoherence test to directly detect in the frequency domain and we indirectly identify the nonlinear relationship by improving the performance of eliminating motion artifact in heartbeat rate estimation using a nonlinear filter, the second-order Volterra filter...
August 14, 2017: Sensors
https://www.readbyqxmd.com/read/28805075/validity-and-reliability-of-accelerometry-in-identification-of-lying-sitting-standing-or-purposeful-activity-in-adult-hospital-inpatients-recovering-from-acute-or-critical-illness-a-systematic-review
#16
Jayne L Anderson, Angela J Green, L Samantha Yoward, Howard K Hall
OBJECTIVE: To investigate the validity and reliability of accelerometers to detect lying, sitting and standing postures or purposeful activity in hospitalized adults recovering from acute or critical illness. DATA SOURCES: CINAHL, MEDLINE, EMBASE, AMED, Cochrane Library, PEDro, PsycINFO and SPORTDiscuss were searched from inception to June 2017. Professional networks and reference lists of relevant articles were also searched. The main selection criteria were hospitalized adults with acute or critical illness and studies investigating the validity or reliability of accelerometers to identify body position or purposeful activity...
August 1, 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28798198/wearable-ballistocardiogram-and-seismocardiogram-systems-for-health-and-performance
#17
Mozziyar Etemadi, Omer T Inan
Cardiovascular diseases (CVDs) are prevalent in the US and many forms of CVDs primarily affect the mechanical aspects of heart function. Wearable technologies for monitoring the mechanical health of the heart and vasculature could enable proactive management of CVDs through titration of care based on physiological status, as well as preventative wellness monitoring to help promote lifestyle choices that reduce the overall risk of developing CVDs. Additionally, such wearable technologies could be used to optimize human performance in austere environments...
August 10, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28798149/the-utility-of-accelerometers-to-predict-stroke-rate-in-captive-fur-seals-and-sea-lions
#18
Monique A Ladds, David A Rosen, David J Slip, Robert G Harcourt
The energy expenditure of free-living fur seals and sea lions is difficult to measure directly, but may be indirectly derived from flipper stroke rate. We filmed 10 captive otariids swimming with accelerometers either attached to a harness (Daily Diary: sampling frequency 32 Hz, N=4) or taped to the fur (G6a+: 25 Hz, N=6). We used down sampling to derive four recording rates from each accelerometer (Daily Diary: 32, 16, 8, 4 Hz; G6a+: 25, 20, 10, 5 Hz). For each of these sampling frequencies, we derived 20 combinations of two parameters (RMW, the window size used to calculate the running mean; and m, the minimum number of points smaller than a local maxima used to detect a peak) from the dynamic acceleration of x, z and x+z, to estimate stroke rate from the accelerometers...
September 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28797831/validity-of-the-actigraph-gt3x-and-bodymedia-sensewear-armband-to-estimate-energy-expenditure-during-physical-activity-and-sport
#19
Paul B Gastin, Cassy Cayzer, Dan Dwyer, Sam Robertson
OBJECTIVES: The purpose of this study was to assess the validity of the ActiGraph GT3X+ (GT3X+) and the BodyMedia SenseWear Armband (SWA) to estimate energy expenditure (EE) during physical activity and field sport movements. DESIGN: Criterion validity. METHODS: Twenty-six active adults completed a single 90min session involving alternating intervals of exercise (5min) and recovery (10min). Exercise involved walking (4km/h), jogging (8km/h), running (12km/h) or a sport-simulated circuit (three intervals)...
July 31, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28797237/validity-of-the-global-physical-activity-questionnaire-gpaq-in-bangladesh
#20
Shirin Jahan Mumu, Liaquat Ali, Anthony Barnett, Dafna Merom
BACKGROUND: Feasible and cost-effective as well as population specific instruments for monitoring physical activity (PA) levels are needed for the management and prevention of non-communicable diseases. The WHO-endorsed Global Physical Activity Questionnaire (GPAQ) has been widely used in developing countries, but the evidence base for its validity, particularly for rural populations, is still limited. The aim of the study was to validate GPAQ among rural and urban residents in Bangladesh...
August 10, 2017: BMC Public Health
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