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https://www.readbyqxmd.com/read/28938232/best-practice-guidelines-for-the-measurement-of-physical-activity-levels-in-stroke-survivors-a-secondary-analysis-of-an-observational-study
#1
Louise Tinlin, Natalie Fini, Julie Bernhardt, Lucy K Lewis, Tim Olds, Coralie English
The aim of this study was to investigate the phenomenon of activity (increased activity in response to monitor wear) and determine the minimum wear time of accelerometers when objectively measuring habitual physical activity levels of community dwelling stroke survivors. Exploratory, secondary analyses of cross-sectional data were carried out. Physical activity variables [sitting, standing and stepping time, step count, light physical activity and moderate-to-vigorous physical activity (MVPA)] were measured with two activity monitors for 7 days...
September 21, 2017: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
https://www.readbyqxmd.com/read/28938204/natural-outdoor-environments-and-mental-health-stress-as-a-possible-mechanism
#2
Margarita Triguero-Mas, David Donaire-Gonzalez, Edmund Seto, Antònia Valentín, David Martínez, Graham Smith, Gemma Hurst, Glòria Carrasco-Turigas, Daniel Masterson, Magdalena van den Berg, Albert Ambròs, Tania Martínez-Íñiguez, Audrius Dedele, Naomi Ellis, Tomas Grazulevicius, Martin Voorsmit, Marta Cirach, Judith Cirac-Claveras, Wim Swart, Eddy Clasquin, Annemarie Ruijsbroek, Jolanda Maas, Michael Jerret, Regina Gražulevičienė, Hanneke Kruize, Christopher J Gidlow, Mark J Nieuwenhuijsen
INTRODUCTION: Better mental health has been associated with exposure to natural outdoor environments (NOE). However, comprehensive studies including several indicators of exposure and outcomes, potential effect modifiers and mediators are scarce. OBJECTIVES: We used novel, objective measures to explore the relationships between exposure to NOE (i.e. residential availability and contact) and different indicators of mental health, and possible modifiers and mediators...
September 19, 2017: Environmental Research
https://www.readbyqxmd.com/read/28937593/a-new-proxy-measurement-algorithm-with-application-to-the-estimation-of-vertical-ground-reaction-forces-using-wearable-sensors
#3
Yuzhu Guo, Fabio Storm, Yifan Zhao, Stephen A Billings, Aleksandar Pavic, Claudia Mazzà, Ling-Zhong Guo
Measurement of the ground reaction forces (GRF) during walking is typically limited to laboratory settings, and only short observations using wearable pressure insoles have been reported so far. In this study, a new proxy measurement method is proposed to estimate the vertical component of the GRF (vGRF) from wearable accelerometer signals. The accelerations are used as the proxy variable. An orthogonal forward regression algorithm (OFR) is employed to identify the dynamic relationships between the proxy variables and the measured vGRF using pressure-sensing insoles...
September 22, 2017: Sensors
https://www.readbyqxmd.com/read/28936416/effect-of-wheelchair-design-on-wheeled-mobility-and-propulsion-efficiency-in-less-resourced-settings
#4
Christopher J Stanfill, Jody L Jensen
BACKGROUND: Wheelchair research includes both qualitative and quantitative approaches, primarily focuses on functionality and skill performance and is often limited to short testing periods. This is the first study to use the combination of a performance test (i.e. wheelchair propulsion test) and a multiple-day mobility assessment to evaluate wheelchair designs in rural areas of a developing country. OBJECTIVES: Test the feasibility of using wheel-mounted accelerometers to document bouts of wheeled mobility data in rural settings and use these data to compare how patients respond to different wheelchair designs...
2017: Afr J Disabil
https://www.readbyqxmd.com/read/28934745/association-between-body-composition-and-motor-performance-in-preschool-children
#5
Tanja H Kakebeeke, Stefano Lanzi, Annina E Zysset, Amar Arhab, Nadine Messerli-Bürgy, Kerstin Stuelb, Claudia S Leeger-Aschmann, Einat A Schmutz, Andrea H Meyer, Susi Kriemler, Simone Munsch, Oskar G Jenni, Jardena J Puder
OBJECTIVE: Being overweight makes physical movement more difficult. Our aim was to investigate the association between body composition and motor performance in preschool children. METHODS: A total of 476 predominantly normal-weight preschool children (age 3.9 ± 0.7 years; m/f: 251/225; BMI 16.0 ± 1.4 kg/m2) participated in the Swiss Preschoolers' Health Study (SPLASHY). Body composition assessments included skinfold thickness, waist circumference (WC), and BMI...
September 22, 2017: Obesity Facts
https://www.readbyqxmd.com/read/28934102/pose-estimation-of-a-mobile-robot-based-on-fusion-of-imu-data-and-vision-data-using-an-extended-kalman-filter
#6
Mary B Alatise, Gerhard P Hancke
Using a single sensor to determine the pose estimation of a device cannot give accurate results. This paper presents a fusion of an inertial sensor of six degrees of freedom (6-DoF) which comprises the 3-axis of an accelerometer and the 3-axis of a gyroscope, and a vision to determine a low-cost and accurate position for an autonomous mobile robot. For vision, a monocular vision-based object detection algorithm speeded-up robust feature (SURF) and random sample consensus (RANSAC) algorithms were integrated and used to recognize a sample object in several images taken...
September 21, 2017: Sensors
https://www.readbyqxmd.com/read/28933707/high-accuracy-automatic-classification-of-parkinsonian-tremor-severity-using-machine-learning-method
#7
Hyoseon Jeon, Woongwoo Lee, Hyeyoung Park, Hong Ji Lee, Sang Kyong Kim, Han Byul Kim, Beomseok Jeon, Kwang Suk Park
Although clinical aspirations for new technology to accurately measure and diagnose Parkinsonian tremors exist, automatic scoring of tremor severity using machine learning approaches has not yet been employed. Objective: This study aims to maximize the scientific validity of automatic tremor-severity classification using machine learning algorithms to score Parkinsonian tremor severity in the same manner as the Unified Parkinson's Disease Rating Scale (UPDRS) used to rate scores in real clinical practice...
September 21, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28930863/measurement-of-active-and-sedentary-behavior-in-context-of-large-epidemiologic-studies
#8
Charles E Matthews, Sarah Kozey Keadle, Steven C Moore, Dale S Schoeller, Raymond J Carroll, Richard P Troiano, Joshua N Sampson
INTRODUCTION/PURPOSE: To assess the utility of measurement methods that may be more accurate and precise than traditional questionnaire-based estimates of habitual physical activity and sedentary behavior we compared the measurement properties of a past year questionnaire (AARP) and more comprehensive measures: an internet-based 24-hour recall (ACT24), and a variety of estimates from an accelerometer (ActiGraph). METHODS: Participants were 932 adults (50-74 y) in a 12-month study that included reference measures of energy expenditure from doubly labeled water (DLW) and active and sedentary time via activPAL...
September 19, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28930176/high-sensitivity-encoder-like-micro-area-changed-capacitive-transducer-for-a-nano-g-micro-accelerometer
#9
Wenjie Wu, Panpan Zheng, Jinquan Liu, Zhu Li, Ji Fan, Huafeng Liu, Liangcheng Tu
Encoder-like micro area-changed capacitive transducers are advantageous in terms of their better linearity and larger dynamic range compared to gap-changed capacitive transducers. Such transducers have been widely applied in rectilinear and rotational position sensors, lab-on-a-chip applications and bio-sensors. However, a complete model accounting for both the parasitic capacitance and fringe effect in area-changed capacitive transducers has not yet been developed. This paper presents a complete model for this type of transducer applied to a high-resolution micro accelerometer that was verified by both simulations and experiments...
September 20, 2017: Sensors
https://www.readbyqxmd.com/read/28928711/validation-of-a-step-detection-algorithm-during-straight-walking-and-turning-in-patients-with-parkinson-s-disease-and-older-adults-using-an-inertial-measurement-unit-at-the-lower-back
#10
Minh H Pham, Morad Elshehabi, Linda Haertner, Silvia Del Din, Karin Srulijes, Tanja Heger, Matthis Synofzik, Markus A Hobert, Gert S Faber, Clint Hansen, Dina Salkovic, Joaquim J Ferreira, Daniela Berg, Álvaro Sanchez-Ferro, Jaap H van Dieën, Clemens Becker, Lynn Rochester, Gerhard Schmidt, Walter Maetzler
INTRODUCTION: Inertial measurement units (IMUs) positioned on various body locations allow detailed gait analysis even under unconstrained conditions. From a medical perspective, the assessment of vulnerable populations is of particular relevance, especially in the daily-life environment. Gait analysis algorithms need thorough validation, as many chronic diseases show specific and even unique gait patterns. The aim of this study was therefore to validate an acceleration-based step detection algorithm for patients with Parkinson's disease (PD) and older adults in both a lab-based and home-like environment...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28928484/highly-sensitive-fiber-optic-accelerometer-by-grating-inscription-in-specific-core-dip-fiber
#11
Qiangzhou Rong, Tuan Guo, Weijia Bao, Zhihua Shao, Gang-Ding Peng, Xueguang Qiao
A highly sensitive fiber-optic accelerometer based on detecting the power output of resonances from the core dip is demonstrated. The sensing probe comprises a compact structure, hereby a short section of specific core (with a significant core dip) fiber stub containing a straight fiber Bragg grating is spliced to another single-mode fiber via a core self-alignment process. The femtosecond laser side-illumination technique was utilized to ensure that the grating inscription region is precisely positioned and compact in size...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28927304/initial-outcomes-of-a-participatory-based-competency-building-approach-to-increasing-physical-education-teachers-physical-activity-promotion-and-students-physical-activity-a-pilot-study
#12
R Glenn Weaver, Collin A Webster, Michael W Beets, Keith Brazendale, Jessica Chandler, Lauren Schisler, Mazen Aziz
This study examined the initial effects of a participatory-based, competency-/skill-building professional development workshop for physical education (PE) teachers on the use of physical activity (PA) promotion practices (e.g., eliminating lines, small-sided games) and students' moderate-to-vigorous physical activity (MVPA). A total of 823 students (52.8% boys) wore accelerometers at baseline (fall 2015) and outcome (spring 2016) on PE and non-PE days. The System for Observing Fitness Instruction Time+ measured changes in PA promotion practices...
September 1, 2017: Health Education & Behavior: the Official Publication of the Society for Public Health Education
https://www.readbyqxmd.com/read/28926856/positive-effects-of-promoting-physical-activity-and-balanced-diets-in-a-primary-school-setting-with-a-high-proportion-of-migrant-school-children
#13
Katharina S Weber, Olaf Spörkel, Melina Mertens, Alem Freese, Klaus Strassburger, Boris Kemper, Clemens Bachmann, Knut Diehlmann, Theodor Stemper, Anette E Buyken, Kerstin Ketelhut, Karsten Müssig
Background Children with migration background are at particular risk for overweight. We assessed the effects of a primary school-based initiative targeted at enhancing physical activity and dietary education among children with a high proportion of migration background. Methods Four 3(rd) and 4(th) grade classes (n=70 children, 77% with migration background) participated in a 10-months intervention comprising 2 additional exercise lessons weekly and 10 nutrition lessons per school year. 6 school classes (n=125 children, 65% with migration background) served as control...
September 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28924150/proxies-of-energy-expenditure-for-marine-mammals-an-experimental-test-of-the-time-trap
#14
Monique A Ladds, David A S Rosen, David J Slip, Robert G Harcourt
Direct measures of energy expenditure are difficult to obtain in marine mammals, and accelerometry may be a useful proxy. Recently its utility has been questioned as some analyses derived their measure of activity level by calculating the sum of accelerometry-based values and then comparing this summation to summed (total) energy expenditure (the so-called "time trap"). To test this hypothesis, we measured oxygen consumption of captive fur seals and sea lions wearing accelerometers during submerged swimming and calculated total and rate of energy expenditure...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28923367/a-prospective-study-examining-the-influence-of-cardiac-rehabilitation-on-the-sedentary-time-of-highly-sedentary-physically-inactive-patients
#15
A Biswas, P I Oh, G E Faulkner, D A Alter
OBJECTIVES: Prolonged sedentary time is recognized as a distinct health risk, and mortality risks are expected to be greatest for individuals with low exercise levels. It is unknown whether participation in exercise-based cardiac rehabilitation (CR) programs influences sedentary behaviour particularly among those patients expected to be at greatest mortality risk. This study examined the influence of CR participation on sedentary behaviour and identified the proportion and characteristics (socio-demographic and clinical) of patients who do not meet exercise recommendations and have prolonged sedentary times...
September 8, 2017: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28922063/individual-calibration-of-accelerometers-in-children-and-their-health-related-implications
#16
Lynne M Boddy, Conor Cunningham, Stuart J Fairclough, Marie H Murphy, Gavin Breslin, Lawrence Foweather, Rebecca M Dagger, Lee E F Graves, Nicola D Hopkins, Gareth Stratton
This study compared children's physical activity (PA) levels, the prevalence of children meeting current guidelines of ≥60 minutes of daily moderate to vigorous PA (MVPA), and PA-health associations using individually calibrated (IC) and empirical accelerometer cutpoints. Data from 75 (n = 32 boys) 10-12 year old children were included in this study. Clustered cardiometabolic (CM) risk, directly measured cardiorespiratory fitness (CRF), anthropometric and 7 day accelerometer data were included within analysis...
September 18, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28922020/seasonal-and-weather-variation-of-sleep-and-physical-activity-in-12-14-year-old-children
#17
Mirja Quante, Rui Wang, Jia Weng, Emily R Kaplan, Michael Rueschman, Elsie M Taveras, Sheryl L Rifas-Shiman, Matthew W Gillman, Susan Redline
BACKGROUND: Understanding variation in physical activity (PA) and sleep is necessary to develop novel intervention strategies targeting adolescents' health behaviors. We examined the extent to which PA and sleep vary by aspects of the physical environment. PARTICIPANTS: We performed a cross-sectional analysis of 669 adolescents in the Project Viva cohort. METHODS: We estimated total PA, sleep duration, sleep efficiency and sleep midpoint timing from wrist accelerometers...
September 18, 2017: Behavioral Sleep Medicine
https://www.readbyqxmd.com/read/28921747/pitfalls-in-accelerometer-based-measurement-of-physical-activity-the-presence-of-reactivity-in-an-adult-population
#18
Sophie Baumann, Stefan Groß, Lisa Voigt, Antje Ullrich, Franziska Weymar, Thea Schwaneberg, Marcus Dörr, Christian Meyer, Ulrich John, Sabina Ulbricht
OBJECTIVE: When a behavior is monitored, it is likely to change, even if no change may be intended. This phenomenon is known as measurement reactivity. We investigated systematic changes in accelerometer-based measures over the days of monitoring as an indicator of measurement reactivity in an adult population. METHODS: One hundred seventy-one participants from the general population (65% women; mean age = 55 years, range: 42-65 years) wore accelerometers for seven consecutive days to measure sedentary behavior and physical activity...
September 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28920072/associations-between-neighborhood-socioeconomic-environment-and-physical-activity-in-cuban-immigrants
#19
Olivia Affuso, Chelsea R Singleton, Scott C Brown, Tatiana Perrino, Shi Huang, José Szapocznik
Physical inactivity is a major public health concern because it is a determinant of obesity and obesity-related chronic diseases. Few longitudinal studies have examined the association between neighborhood socioeconomic (SES) environment and change in physical activity behaviors. Additionally, few studies have examined this association in immigrant groups or Hispanic subgroups such as Cubans. This research aimed to determine if neighborhood SES is associated with longitudinal change in moderate-to-vigorous physical activity (MVPA) among Cuban immigrants who participate in the Cuban Health Study in Miami, Florida...
December 2016: SSM—Population Health
https://www.readbyqxmd.com/read/28919877/analysis-of-correlation-between-an-accelerometer-based-algorithm-for-detecting-parkinsonian-gait-and-updrs-subscales
#20
Alejandro Rodríguez-Molinero, Albert Samà, Carlos Pérez-López, Daniel Rodríguez-Martín, Sheila Alcaine, Berta Mestre, Paola Quispe, Benedetta Giuliani, Gabriel Vainstein, Patrick Browne, Dean Sweeney, J Manuel Moreno Arostegui, Àngels Bayes, Hadas Lewy, Alberto Costa, Roberta Annicchiarico, Timothy Counihan, Gearòid Ò Laighin, Joan Cabestany
BACKGROUND: Our group earlier developed a small monitoring device, which uses accelerometer measurements to accurately detect motor fluctuations in patients with Parkinson's (On and Off state) based on an algorithm that characterizes gait through the frequency content of strides. To further validate the algorithm, we studied the correlation of its outputs with the motor section of the Unified Parkinson's Disease Rating Scale part-III (UPDRS-III). METHOD: Seventy-five patients suffering from Parkinson's disease were asked to walk both in the Off and the On state while wearing the inertial sensor on the waist...
2017: Frontiers in Neurology
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