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https://www.readbyqxmd.com/read/28343237/actogram-analysis-of-free-flying-migratory-birds-new-perspectives-based-on-acceleration-logging
#1
REVIEW
Johan Bäckman, Arne Andersson, Lykke Pedersen, Sissel Sjöberg, Anders P Tøttrup, Thomas Alerstam
The use of accelerometers has become an important part of biologging techniques for large-sized birds with accelerometer data providing information about flight mode, wing-beat pattern, behaviour and energy expenditure. Such data show that birds using much energy-saving soaring/gliding flight like frigatebirds and swifts can stay airborne without landing for several months. Successful accelerometer studies have recently been conducted also for free-flying small songbirds during their entire annual cycle. Here we review the principles and possibilities for accelerometer studies in bird migration...
March 25, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28343006/trouble-on-takeoff-crude-oil-on-feathers-reduces-escape-performance-of-shorebirds
#2
Ivan Maggini, Lisa V Kennedy, Kyle H Elliott, Karen M Dean, Robert MacCurdy, Alexander Macmillan, Chris A Pritsos, Christopher G Guglielmo
The ability to takeoff quickly and accelerate away from predators is crucial to bird survival. Crude oil can disrupt the fine structure and function of feathers, and here we tested for the first time how small amounts of oil on the trailing edges of the wings and tail of Western sandpipers (Calidris mauri) affected takeoff flight performance. In oiled birds, the distance travelled during the first 0.4s after takeoff was reduced by 29%, and takeoff angle was decreased by 10° compared to unoiled birds. Three-axis accelerometry indicated that oiled sandpipers produced less mechanical power output per wingbeat during the initial phase of flight...
March 23, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28339829/perceived-office-environments-and-occupational-physical-activity-in-office-based-workers
#3
A Sawyer, L Smith, M Ucci, R Jones, A Marmot, A Fisher
Background: Individuals in office-based occupations have low levels of physical activity but there is little research into the socio-ecological correlates of workplace activity. Aims: To identify factors contributing to office-based workers' perceptions of the office environment and explore cross-sectional relationships between these factors and occupational physical activity. Methods: Participants in the Active Buildings study reported perceptions of their office environment using the Movement at Work Survey...
March 1, 2017: Occupational Medicine
https://www.readbyqxmd.com/read/28339408/exploring-the-feasibility-and-use-of-acceleromters-before-during-and-after-a-camp-based-cimt-program-for-children-with-cerebral-palsy
#4
Patty Coker-Bolt, Ryan J Downey, Jacqueline Connolly, Reagin Hoover, Daniel Shelton, Na Jin Seo
PURPOSE: The aim of this pilot study was to determine the feasibility and use accelerometers before, during, and after a camp-based constraint-induced movement therapy (CIMT) program for children with hemiplegic cerebral palsy. METHODS: A pre-test post-test design was used for 12 children with CP (mean = 4.9 yrs) who completed a 30-hour camp-based CIMT program. The accelerometer data were collected using ActiGraph GT9X Link. Children wore accelerometers on both wrists one day before and after the camp and on the affected limb during each camp day...
2017: Journal of Pediatric Rehabilitation Medicine
https://www.readbyqxmd.com/read/28338921/the-relationship-between-objectively-measured-walking-and-risk-of-pedestrian-motor-vehicle-collision
#5
D Alex Quistberg, Eric J Howard, Philip M Hurvitz, Anne V Moudon, Beth E Ebel, Frederick P Rivara, Brian E Saelens
Safe urban walking environments may improve health by encouraging physical activity, but the relationship between an individual's location and walking pattern and the risk of pedestrian-motor vehicle collision is unknown. We examined associations between individuals' walking bouts and walking risk, measured as mean exposure to the risk of pedestrian-vehicle collision. Walking bouts were ascertained through integrated accelerometry and global positioning system data and from individual travel-diary data obtained from adults in the Travel Assessment and Community Study (King County, Washington) in 2008-2009...
March 1, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338396/should-ballet-dancers-vary-postures-and-under-foot-surfaces-when-practicing-postural-balance
#6
Nili Steinberg, Gordon Waddington, Roger Adams, Janet Karin, Oren Tirosh
BACKGROUND: Postural balance (PB) is an important component skill for professional dancers. However, the effects of different types of postures and different underfoot surfaces on PB have not been adequately addressed. PURPOSE: The main aim of the present study was to investigate the effect of different conditions of footwear, surfaces, and standing positions on static and dynamic PB ability of young ballet dancers. METHOD: Thirty-six male and female young professional ballet dancers (aged 14-19) completed static and dynamic balance testing, measured by head and lumbar accelerometers, while standing on one leg in the turn-out position, under six different conditions: 1...
March 24, 2017: Motor Control
https://www.readbyqxmd.com/read/28335540/a-vehicle-steering-recognition-system-based-on-low-cost-smartphone-sensors
#7
Xinhua Liu, Huafeng Mei, Huachang Lu, Hailan Kuang, Xiaolin Ma
Recognizing how a vehicle is steered and then alerting drivers in real time is of utmost importance to the vehicle and driver's safety, since fatal accidents are often caused by dangerous vehicle maneuvers, such as rapid turns, fast lane-changes, etc. Existing solutions using video or in-vehicle sensors have been employed to identify dangerous vehicle maneuvers, but these methods are subject to the effects of the environmental elements or the hardware is very costly. In the mobile computing era, smartphones have become key tools to develop innovative mobile context-aware systems...
March 20, 2017: Sensors
https://www.readbyqxmd.com/read/28332863/male-and-female-worldsid-and-post-mortem-human-subject-responses-in-full-scale-vehicle-tests
#8
Narayan Yoganandan, John Humm, Frank Pintar, Heather Rhule, Kevin Moorhouse, Brian Suntay, Jim Stricklin, Rodney Rudd, Matthew Craig
Structured ABSTRACT Objective: To compare the responses of male and female WorldSID dummies with post mortem human subject (PMHS) responses in full-scale vehicle tests. METHODS: Tests were conducted according to the FMVSS-214 protocols and using the United States Side impact New Car Assessment Program change in velocity to match PMHS experiments, published earlier. Moving deformable barrier (MDB) tests were conducted with the male and female surrogates in the left front and left rear seats...
March 23, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28332815/detecting-subtle-vibrations-using-graphene-based-cellular-elastomers
#9
M Bulut Coskun, Ling Qiu, Md Shamsul Arefin, Adrian Neild, Mehmet Yuce, Dan Li, Tuncay Alan
Ultralight graphene elastomer-based flexible sensors are developed to detect subtle vibrations within a broad bandwidth frequency. The same device can be employed as an accelerometer, tested within the experimental bandwidth of 20-300 Hz as well as a microphone, monitoring sound pressures from 300 to 20,000 Hz. The sensing element does not contain any metal parts, making them undetectable by external sources and can provide a sensitivity of 2.6 mV/g/V, which is higher than those of rigid Si-based piezoresistive micro electro mechanical systems (MEMS) systems...
March 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28332338/goal-disengagement-well-being-and-goal-achievement-in-romantic-couples-pursuing-health-behavior-change-evidence-from-two-daily-diary-studies
#10
Janina Lüscher, Corina Berli, Urte Scholz
BACKGROUND: Withdrawing effort and commitment from important goals (i.e. goal disengagement) has been discussed as an effective aspect of goal adaption. However, studies have focused especially on between-person differences. The present studies aimed to investigate within-person differences in goal disengagement within a dyadic context of romantic couples. Across two different health behaviors, we specifically tested whether goal disengagement would be associated with better well-being, but lower goal achievement in everyday life...
March 2017: Applied Psychology. Health and Well-being
https://www.readbyqxmd.com/read/28332337/profiles-of-physical-function-physical-activity-and-sedentary-behavior-and-their-associations-with-mental-health-in-residents-of-assisted-living-facilities
#11
Saengryeol Park, Cecilie Thøgersen-Ntoumani, Nikos Ntoumanis, Andreas Stenling, Sally A M Fenton, Jet J C S Veldhuijzen van Zanten
BACKGROUND: The current study used latent profile analyses to identify classes of older participants based on physical health, physical function, light physical activity, moderate-to-vigorous physical activity, and sedentary behavior, and then examined differences in mental health between these classes. METHODS: Eighty-five residents (M = 77.5 years old, SD = 8.2) from assisted living facilities participated. Light physical activity, moderate-to-vigorous physical activity, and sedentary behavior were assessed by accelerometers, physical function was measured using different tasks (mobility, grip strength, and spirometry), and body mass index was calculated...
March 2017: Applied Psychology. Health and Well-being
https://www.readbyqxmd.com/read/28332066/cultural-variables-underlying-obesity-in-latino-men-design-rationale-and-participant-characteristics-from-the-latino-men-s-health-initiative
#12
Lisa Sanchez-Johnsen, Meredith Craven, Magdalena Nava, Angelica Alonso, Amanda Dykema-Engblade, Alfred Rademaker, Hui Xie
Overweight and obesity are associated with significant health problems and rates of obesity are high among Latino men. This paper describes the design, rationale and participant characteristics of the key demographic variables assessed in an NIH-funded study (R21-CA143636) addressing culture and several obesity-related variables (diet, physical activity, and body image) among Mexican and Puerto Rican men using a community-based participatory research framework. Participants completed objective measures (height, weight, body fat, hip, waist), a health and culture interview, a diet questionnaire, and used an accelerometer to measure their level of physical activity...
March 23, 2017: Journal of Community Health
https://www.readbyqxmd.com/read/28330455/exergames-versus-self-regulated-exercises-with-instruction-leaflets-to-improve-adherence-during-geriatric-rehabilitation-a-randomized-controlled-trial
#13
Peter Oesch, Jan Kool, Luis Fernandez-Luque, Ellen Brox, Gunn Evertsen, Anton Civit, Roger Hilfiker, Stefan Bachmann
BACKGROUND: Improving mobility in elderly persons is a primary goal in geriatric rehabilitation. Self-regulated exercises with instruction leaflets are used to increase training volume but adherence is often low. Exergames may improve adherence. This study therefore compared exergames with self-regulated exercise using instruction leaflets. The primary outcome was adherence. Secondary outcomes were enjoyment, motivation and balance during walking. METHODS: Design: single center parallel group non-blinded randomized controlled trial with central stratified randomization...
March 23, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28329327/association-of-accelerometer-measured-physical-activity-with-leukocyte-telomere-length-among-older-women
#14
Aladdin H Shadyab, Michael J LaMonte, Charles Kooperberg, Alexander P Reiner, Cara L Carty, Todd M Manini, Lifang Hou, Chongzhi Di, Andrea Z LaCroix
Background: Previous studies on physical activity and telomere length have relied largely upon self-reported physical activity data, and few studies have examined older adults. The association of objectively measured physical activity with leukocyte telomere length (LTL) is currently unknown. Methods: In this study, we examined cross-sectional associations between accelerometer-measured total, light, and moderate-to-vigorous physical activity (MVPA) and LTL, measured using Southern blot...
March 9, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28329086/obesity-history-and-daily-patterns-of-physical-activity-at-age-60-64-years-findings-from-the-mrc-national-survey-of-health-and-development
#15
Rachel Cooper, Lei Huang, Rebecca Hardy, Adina Crainiceanu, Tamara Harris, Jennifer A Schrack, Ciprian Crainiceanu, Diana Kuh
Background: The aim of this study was to investigate associations of current body mass index (BMI) and obesity history with daily patterns of physical activity. Methods: At age 60-64, participants from a British birth cohort study wore accelerometers for 5 days. Accelerometry counts were log-transformed and mean log-counts were used to derive a summary variable indicating total daily log-activity counts. Among those with complete data (n = 1,388) the associations of current BMI and age of first obesity were examined with: (a) total daily log-activity counts and (b) total log-activity counts in four segments of the day...
February 18, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28329025/correction-measuring-physical-activity-with-hip-accelerometry-among-u-s-older-adults-how-many-days-are-enough
#16
Masha Kocherginsky, Megan Huisingh-Scheetz, William Dale, Diane S Lauderdale, Linda Waite
[This corrects the article DOI: 10.1371/journal.pone.0170082.].
2017: PloS One
https://www.readbyqxmd.com/read/28328999/what-the-electrical-impedance-can-tell-about-the-intrinsic-properties-of-an-electrodynamic-shaker
#17
Bernd Lütkenhöner
Small electrodynamic shakers are becoming increasingly popular for diagnostic investigations of the human vestibular system. More specifically, they are used as mechanical stimulators for eliciting a vestibular evoked myogenic potential (VEMP). However, it is largely unknown how shakers perform under typical measurement conditions, which considerably differ from the normal use of a shaker. Here, it is shown how the basic properties of a shaker can be determined without requiring special sensors such as accelerometers or force gauges...
2017: PloS One
https://www.readbyqxmd.com/read/28327985/the-need-to-approximate-the-use-case-in-clinical-machine-learning
#18
Sohrab Saeb, Luca Lonini, Arun Jayaraman, David C Mohr, Konrad P Kording
Background: The availability of smartphone and wearable sensor technology is leading to a rapid accumulation of human subject data, and machine learning is emerging as a technique to map that data into clinical predictions. As machine learning algorithms are increasingly used to support clinical decision making, it is vital to reliably quantify their prediction accuracy. Cross-validation is the standard approach where the accuracy of such algorithms is evaluated on data the algorithm has not seen during training...
March 15, 2017: GigaScience
https://www.readbyqxmd.com/read/28327543/physical-limitations-walkability-perceived-environmental-facilitators-and-physical-activity-of-older-adults-in-finland
#19
Erja Portegijs, Kirsi E Keskinen, Li-Tang Tsai, Taina Rantanen, Merja Rantakokko
The aim was to study objectively assessed walkability of the environment and participant perceived environmental facilitators for outdoor mobility as predictors of physical activity in older adults with and without physical limitations. 75-90-year-old adults living independently in Central Finland were interviewed (n = 839) and reassessed for self-reported physical activity one or two years later (n = 787). Lower-extremity physical limitations were defined as Short Physical Performance Battery score ≤9. Number of perceived environmental facilitators was calculated from a 16-item checklist...
March 22, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28327174/randomised-controlled-feasibility-study-of-a-school-based-multi-level-intervention-to-increase-physical-activity-and-decrease-sedentary-behaviour-among-vocational-school-students
#20
Nelli Hankonen, Matti T J Heino, Sini-Tuuli Hynynen, Hanna Laine, Vera Araújo-Soares, Falko F Sniehotta, Tommi Vasankari, Reijo Sund, Ari Haukkala
BACKGROUND: No school-based physical activity (PA) interventions among older adolescents have demonstrated long-term effectiveness, and few of them so far have addressed sedentary behaviour (SB). Based on behavioural theories and evidence, we designed a multi-level intervention to increase PA and decrease SB among vocational school students. This study investigates feasibility and acceptability of two main intervention components and research procedures. We also examine uptake of behaviour change techniques (BCTs) by the participants...
March 21, 2017: International Journal of Behavioral Nutrition and Physical Activity
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