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M A Sutherland, G L Lowe, F J Huddart, J R Waas, M Stewart
We determined if feeding and lying behavior, recorded by automatic calf feeding systems (ACFS) and accelerometers, could be used to detect changes in behavior before onset of neonatal calf diarrhea (NCD) or in response to disbudding pain in dairy calves. At 4 d of age, 112 calves had accelerometers attached to their hind leg and were housed in pens with ACFS. Calves were examined daily for signs of illness or injury. Of the 112 calves monitored, 18 were diagnosed with NCD; activities of calves with NCD were then compared with those of 18 healthy controls (calves that had no symptoms of NCD, other illnesses, or injury)...
June 13, 2018: Journal of Dairy Science
Michele Novaes Ravelli, Dale A Schoeller, Alex Harley Crisp, Natalie M Racine, Karina Pfrimer, Irineu Rasera Junior, Maria Rita Marques de Oliveira
BACKGROUND AND AIMS: Predictive equations remain the clinical tool of choice to estimate the energy expenditure, however, poor accuracy has been found when applied in patients with severe obesity. The aim of this study was to test the accuracy of the total energy expenditure (TEE) those obtained by predictive equations of resting energy expenditure (REE) times individual estimates of metabolic equivalents (MET), taking as reference the TEE measured by doubly labeled water (DLW), before, six and twelve months after bariatric surgery...
August 2018: Clinical Nutrition ESPEN
Mark Richards, Brian Olshansky, Arjun D Sharma, Nicholas Wold, Paul Jones, David Perschbacher, Bruce L Wilkoff
BACKGROUND: Heart Rate Score (HRSc)≥70%, a novel parameter, predicts risk of mortality in patients with implantable defibrillators and identifies patients who have survival benefit with DDDR versus DDD pacing. OBJECTIVE: DDDR pacing lowers HRSc and dual-sensor with minute ventilation (MV) and accelerometer (XL) improves HRSc more than accelerometer (XL) alone in patients requiring pacemakers (PM). METHODS: HRSc, the percent of all beats in the predominant 10 bpm bin, was calculated...
June 13, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Oren Tirosh, Guy Orland, Alon Eliakim, Dan Nemet, Nili Steinberg
OBJECTIVES: To determine the between-visit reliability of an accelerometer as a measure of lower-extremity impact acceleration at a variety of gait speeds in children. DESIGN: Absolute reliability assessment. METHODS: Ten children with no known gait pathology attended two testing sessions, three weeks apart. A tri-axial accelerometer was fixed to the child's distal tibia to measure peak positive acceleration responses while walking and running on the treadmill at three different speeds (comfortable walking, threshold walking, and jogging)...
June 5, 2018: Journal of Science and Medicine in Sport
Swapan K Roy, Vincent T K Sauer, Jocelyn N Westwood-Bachman, Anandram Venkatasubramanian, Wayne K Hiebert
Mechanical resonances are used in a wide variety of devices, from smartphone accelerometers to computer clocks and from wireless filters to atomic force microscopes. Frequency stability, a critical performance metric, is generally assumed to be tantamount to resonance quality factor (the inverse of the linewidth and of the damping). We show that the frequency stability of resonant nanomechanical sensors can be improved by lowering the quality factor. At high bandwidths, quality-factor reduction is completely mitigated by increases in signal-to-noise ratio...
June 15, 2018: Science
Nini H Jonkman, Kimberley S van Schooten, Andrea B Maier, Mirjam Pijnappels
eHealth solutions are increasingly being applied to deliver interventions for promoting an active lifestyle in the general population but also in older people. Objective assessment of daily physical activity (PA) is essential to accurately and reliably evaluate the effectiveness of such interventions. This review presents an overview of eHealth interventions that focus on promoting PA in community-dwelling older people, and discusses the methods used to objectively assess PA, and the effectiveness of the eHealth interventions in increasing PA...
July 2018: Maturitas
Takanobu Shioya, Susumu Sato, Masahiro Iwakura, Hitomi Takahashi, Yoshino Terui, Sachiko Uemura, Masahiro Satake
Physical activity (PA) is defined as bodily movement produced by skeletal muscles with energy expenditure beyond resting levels. PA is closely related to reduced morbidity and mortality in chronic obstructive pulmonary disease (COPD). Self-report questionnaires are often subject to recall bias, correlating poorly with objectively qualified PA, and do not provide an accurate estimate of free-living energy expenditure. PA may be objectively evaluated by newly developed tri-axial accelerometers by quantifying steps or body movements over a period of time...
June 11, 2018: Respiratory Investigation
Brett C Bade, J Madison Hyer, Benjamin T Bevill, Alex Pastis, Alana M Rojewski, Benjamin A Toll, Gerard A Silvestri
INTRODUCTION: Physical activity (PA) is a potential therapy to improve quality of life in patients with advanced-stage lung cancer (LC), but no PA regimen has been shown to be beneficial, clinically practical, and sustainable. We sought to test the hypothesis that a patient-centered activity regimen (PCAR) will improve patient participation and PA more effectively than weekly phone calls. METHODS: In patients with advanced-stage LC, we implemented a walking-based activity regimen and motivated patients via either weekly phone calls (n = 29; FitBit Zip accelerometer) or PCAR (n = 15; FitBit Flex, an educational session, and twice-daily gain-framed text messages)...
June 1, 2018: Integrative Cancer Therapies
Alejandro Silva, Alejandro Zarzo, Juan M Munoz-Guijosa, Francesco Miniello
A common fault in turbomachinery is rotor⁻casing rub. Shaft vibration, measured with proximity probes, is the most powerful indicator of rotor⁻stator rub. However, in machines such as aeroderivative turbines, with increasing industrial relevance in power generation, constructive reasons prevent the use of those sensors, being only acceleration signals at selected casing locations available. This implies several shortcomings in the characterization of the machinery condition, associated with a lower information content about the machine dynamics...
June 13, 2018: Sensors
Rebecca A Dennison, Adina L Feldman, Juliet A Usher-Smith, Simon J Griffin
BACKGROUND: Physical activity (PA) and fruit and vegetable intake (FVI) are two key modifiable risk factors for cardiovascular disease (CVD). Achieving change in these behaviours is challenging and affected by many variables including psychosocial factors. We aimed to investigate the association between social support, stress and mood, and change in PA and FVI following provision of CVD risk information and web-based lifestyle advice. METHODS: Seven hundred sixteen blood donors (56% male; mean age 57 years) from the intervention arms of the Information and Risk Modification (INFORM) trial, a randomised controlled trial to assess the impact of providing CVD risk and web-based lifestyle information, were analysed as a prospective cohort...
June 13, 2018: BMC Public Health
Elvar Smari Saevarsson, Sigridur Lara Gudmundsdottir, Marko Kantomaa, Sigurbjorn A Arngrimsson, Thorarinn Sveinsson, Sigurgrimur Skulason, Erlingur Johannsson
AIM: The associations between body fat levels and physical activity with academic performance are inconclusive and were explored using longitudinal data. METHODS: We enrolled 134/242 adolescents aged 15, who were studied at the age of nine and agreed to be followed up from April to May 2015 for the Health behaviours of Icelandic youth study. Accelerometers measured physical activity, body mass indexes were calculated and dual-energy X-ray absorptiometry scans assessed the participants' body composition at nine and 15...
June 13, 2018: Acta Paediatrica
Orion T Stewart, Anne Vernez Moudon, Alyson J Littman, Edmund Seto, Brian E Saelens
This study explored how parks within the home neighborhood contribute to total physical activity (PA) by isolating park-related PA. Seattle-area adults (n = 634) were observed using time-matched accelerometer, Global Positioning System (GPS), and travel diary instruments. Of the average 42.3 min of daily total PA, only 11% was related to parks. Both home neighborhood park count and area were associated with park-based PA, but not with PA that occurred elsewhere, which comprised 89% of total PA. This study demonstrates clear benefits of neighborhood parks for contributing to park-based PA while helping explain why proximity to parks is rarely associated with overall PA...
June 9, 2018: Health & Place
Scott Duncan, Tom Stewart, Mikkel Bo Schneller, Suneeta Godbole, Kelli Cain, Jacqueline Kerr
PURPOSE: The aim of the present study was to examine the convergent validity of two commonly-used accelerometers for estimating time spent in various physical activity intensities in adults. METHODS: The sample comprised 37 adults (26 males) with a mean (SD) age of 37.6 (12.2) years from San Diego, USA. Participants wore ActiGraph GT3X+ and Actical accelerometers for three consecutive days. Percent agreement was used to compare time spent within four physical activity intensity categories under three counts per minute (CPM) threshold protocols: (1) using thresholds developed specifically for each accelerometer, (2) applying ActiGraph thresholds to regression-rectified Actical CPM data, and (3) developing new 'optimal' Actical thresholds...
2018: PloS One
Samuel D Towne, Yajuan Li, Shinduk Lee, Matthew Lee Smith, Gang Han, Cindy Quinn, Yuxian Du, Mark Benden, Marcia G Ory
INTRODUCTION: Physical activity declines are seen with increasing age; however, the US CDC recommends most older adults (age 65 and older) engage in the same levels of physical activity as those 18-64 to lessen risks of injuries (e.g., falls) and slow deteriorating health. We aimed to identify whether older adults participating in a short (approx. 90-minute sessions) 20 session (approximately 10-weeks) health and wellness program delivered in a community setting saw improvements in physical activity and whether these were sustained over time...
2018: PloS One
Serena de Gelidi, Nima Seifnaraghi, Andy Bardill, Andrew Tizzard, Yu Wu, Erich Sorantin, Sven Nordebo, Andreas Demosthenous, Richard H Bayford
Newborns with lung immaturity often require continuous monitoring and treatment of their lung ventilation in intensive care units, especially if born preterm. Recent studies indicate that Electrical Impedance Tomography (EIT) is feasible in newborn
 infants and children, and can quantitatively identify changes in regional lung aeration and ventilation following alterations to respiratory conditions. Information on the patient-specic shape of the torso and its role in minimizing the artefacts in the
 reconstructed images can improve the accuracy of the clinical parameters obtained from EIT...
June 12, 2018: Physiological Measurement
Kelley Pettee Gabriel, Stephen Sidney, David R Jacobs, Kara M Whitaker, Mercedes R Carnethon, Cora E Lewis, Pamela J Schreiner, Raja I Malkani, James M Shikany, Jared P Reis, Barbara Sternfeld
To describe 10-year changes in accelerometer-determined physical activity (PA) and sedentary time in a midlife cohort, within and by race/sex groups. Coronary Artery Risk Development in Young Adults participants (n = 962) who wore the accelerometer with valid wear (≥4 of 7 days, ≥10 hours per day) at baseline (2005-06; ages 38-50; ActiGraph 7164) and 10-year follow-up (2015-16; ages 48-60; ActiGraph wGT3X-BT). Data were calibrated to account for accelerometer model differences. Participants (aged 45...
June 11, 2018: American Journal of Epidemiology
Iku Suzuki, Masayuki Okuda, Maki Tanaka, Shigeru Inoue, Shigeho Tanaka, Chiaki Tanaka
BACKGROUND: An accurate description of physical activity (PA) at school is required for appropriate health interventions. We examined PA patterns of children, and identified time periods that influenced them. METHODS: Forty students in 5 Japanese primary schools were asked to wear triaxial accelerometers for at least7 days. We obtained coefficients of variance (CV) at 15 min intervals, and conducted factor analysis of the school periods. A questionnaire was used to investigate where students spent time before school, and during recesses...
June 12, 2018: Pediatrics International: Official Journal of the Japan Pediatric Society
Ludovic Seifert, Dominic Orth, Bruno Mantel, Jérémie Boulanger, Romain Hérault, Matt Dicks
The aim of this study was to investigate how the affordances of an indoor climbing wall changed for intermediate climbers following a period of practice during which hold orientation was manipulated within a learning and transfer protocol. The learning protocol consisted of four sessions, in which eight climbers randomly ascended three different routes of fixed absolute difficulty (5c on the French scale), as fluently as possible. All three routes were 10.3 m in height and composed of 20 hand-holds at the same locations on an artificial climbing wall; only hold orientations were altered: (i) a horizontal-edge route (H) was designed to afford horizontal hold grasping, (ii) a vertical-edge route (V) afforded vertical hold grasping, and (iii), a double-edge route (D) was designed to afford both horizontal and vertical hold grasping...
2018: Frontiers in Psychology
Yoshihisa Oishi, Hidenobu Ohta, Takako Hirose, Sachiko Nakaya, Keiji Tsuchiya, Machiko Nakagawa, Isao Kusakawa, Toshihiro Sato, Toshimasa Obonai, Hiroshi Nishida, Hitoshi Yoda
The purpose of this study was to determine the effects of body position (prone, supine and lateral) together with sleep status (wake and sleep) on the cardiorespiratory stability of near-term infants. A total of 53 infants (gestational age at birth 33.2 ± 3.5 weeks; birth weight 1,682 ± 521 g; gestational age at recording 38.6 ± 2.1 weeks; weight at recording: 2,273 ± 393 g) were monitored for 24 hours for clinically significant apnea (>15 seconds), bradycardia (<100 bpm), and oxygen desaturation (SpO2  < 90%) in alternating body positions (prone, supine and lateral) by cardiorespiratory monitors and 3-orthogonal-axis accelerometers...
June 11, 2018: Scientific Reports
Lee Smith, Alexia Sawyer, Benjamin Gardner, Katri Seppala, Marcella Ucci, Alexi Marmot, Pippa Lally, Abi Fisher
Habitual behaviours are learned responses that are triggered automatically by associated environmental cues. The unvarying nature of most workplace settings makes workplace physical activity a prime candidate for a habitual behaviour, yet the role of habit strength in occupational physical activity has not been investigated. Aims of the present study were to: (i) document occupational physical activity habit strength; and (ii) investigate associations between occupational activity habit strength and occupational physical activity levels...
June 9, 2018: International Journal of Environmental Research and Public Health
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