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https://www.readbyqxmd.com/read/29457753/bone-strength-and-exercise-during-youth-the-year-that-was-2017
#1
Kathleen F Janz, Fatima Baptista
The positive effects of physical activity on bone strength are certain. However, researchers have yet to precisely quantify the contribution of specific characteristics of physical activity that affect bone strength in children and adolescents. This commentary highlights 2 noteworthy 2017 publications that addressed osteogenic physical activity dose-response issues. Both papers moved the field forward by providing new insights on physical activity exposures beyond high-impact loading. Koedijk et al's paper was selected because, to the best of our knowledge, it is the first systematic review to solely examine associations between sedentary behavior and indicators of bone strength...
February 19, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29457580/food-and-beverage-intakes-according-to-physical-activity-levels-in-european-children-the-idefics-identification-and-prevention-of-dietary-and-lifestyle-induced-health-effects-in-children-and-infants-study
#2
Alba M Santaliestra-Pasías, Jaime E Llamas Dios, Ole Sprengeler, Antje Hebestreit, Stefaan De Henauw, Gabriele Eiben, Regina Felsö, Fabio Lauria, Michael Tornaritis, Toomas Veidebaum, Valeria Pala, Luis A Moreno
OBJECTIVE: Physical activity (PA) levels and dietary habits are considered some of the most important factors associated with obesity. The present study aimed to examine the association between PA level and food and beverage consumption in European children (2-10 years old). Design/Setting/Subjects A sample of 7229 children (49·0 % girls) from eight European countries participating in the IDEFICS (Identification and prevention of Dietary and lifestyle induced health EFfects In Children and infantS) study was included...
February 19, 2018: Public Health Nutrition
https://www.readbyqxmd.com/read/29456829/processing-of-acceleration-and-dive-data-on-board-satellite-relay-tags-to-investigate-diving-and-foraging-behaviour-in-free-ranging-marine-predators
#3
Sam L Cox, Florian Orgeret, Mathieu Gesta, Charles Rodde, Isaac Heizer, Henri Weimerskirch, Christophe Guinet
Biologging technologies are changing the way in which the marine environment is observed and monitored. However, because device retrieval is typically required to access the high-resolution data they collect, their use is generally restricted to those animals that predictably return to land. Data abstraction and transmission techniques aim to address this, although currently these are limited in scope and do not incorporate, for example, acceleration measurements which can quantify animal behaviours and movement patterns over fine-scales...
January 2018: Methods in Ecology and Evolution
https://www.readbyqxmd.com/read/29454542/classifying-running-speed-conditions-using-a-single-wearable-sensor-optimal-segmentation-and-feature-extraction-methods
#4
Lauren C Benson, Christian A Clermont, Sean T Osis, Dylan Kobsar, Reed Ferber
Accelerometers have been used to classify running patterns, but classification accuracy and computational load depends on signal segmentation and feature extraction. Stride-based segmentation relies on identifying gait events, a step avoided by using window-based segmentation. For each segment, discrete points can be extracted from the accelerometer signal, or advanced features can be computed. Therefore, the purpose of this study was to examine how different segmentation and feature extraction methods influence the accuracy and computational load of classifying running conditions...
February 8, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29454318/points-based-physical-activity-a-novel-approach-to-facilitate-changes-in-body-composition-in-inactive-women-with-overweight-and-obesity
#5
Adrian Holliday, Alice Burgin, Elyzabeth Vargas Fernandez, Sally A M Fenton, Frank Thielecke, Andrew K Blannin
BACKGROUND: Physical activity (PA) interventions for the promotion of weight-management may benefit from increased choice and flexibility to overcome commonly-perceived barriers to PA. The aim of this study was to investigate the effects of a novel "points-based" approach to PA on body composition in inactive women, who are overweight or obese. METHODS: Seventy-six overweight or obese, inactive women were randomly allocated to one of three conditions: 'Points-based' PA (PBPA; 30 "PA points"•week- 1 ), Structured exercise (StructEx; 150 min moderate-intensity exercise•week- 1 ) or control (CONT; continue habitual inactive lifestyle) for a 24-week intervention...
February 17, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29452755/machine-learning-algorithms-based-on-signals-from-a-single-wearable-inertial-sensor-can-detect-surface-and-age-related-differences-in-walking
#6
B Hu, P C Dixon, J V Jacobs, J T Dennerlein, J M Schiffman
The aim of this study was to investigate if a machine learning algorithm utilizing triaxial accelerometer, gyroscope, and magnetometer data from an inertial motion unit (IMU) could detect surface- and age-related differences in walking. Seventeen older (71.5 ± 4.2 years) and eighteen young (27.0 ± 4.7 years) healthy adults walked over flat and uneven brick surfaces wearing an inertial measurement unit (IMU) over the L5 vertebra. IMU data were binned into smaller data segments using 4-s sliding windows with 1-s step lengths...
January 12, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29452749/children-s-physical-activity-levels-during-organised-sports-practices
#7
Kate Ridley, Sara Zabeen, Belinda K Lunnay
OBJECTIVES: This study measured the physical activity levels of children during practice sessions of four popular organised sports in Australia. DESIGN: Cross-sectional observational design. METHODS: Participants comprised children from four local organised sports clubs in suburban Adelaide, South Australia. The sports examined were Australian Rules Football (AFL), girls' netball, boys' soccer and girls' soccer. Each participant wore a waist-mounted GT3X or GT3X+Actigraph accelerometer in either one or two of the practice sessions...
February 8, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29452687/diagnostic-challenges-in-epilepsy-seizure-under-reporting-and-seizure-detection
#8
REVIEW
Christian E Elger, Christian Hoppe
Epileptic seizures vary greatly in clinical phenomenology and can markedly affect the patient's quality of life. As therapeutic interventions focus on reduction or elimination of seizures, the accurate documentation of seizure occurrence is essential. However, patient self-evaluation compared with objective evaluation by video-electroencephalography (EEG) monitoring or long-term ambulatory EEG revealed that patients document fewer than 50% of their seizures, on average, and that documentation accuracy varies significantly over time...
March 2018: Lancet Neurology
https://www.readbyqxmd.com/read/29449948/physical-activity-and-sedentary-behavior-following-pediatric-burns-a-preliminary-investigation-using-objective-activity-monitoring
#9
Moniek Akkerman, Leonora J Mouton, Laurien M Disseldorp, Anuschka S Niemeijer, Marco van Brussel, Lucas H V van der Woude, Marianne K Nieuwenhuis
Background: Adequate levels of regular physical activity (PA) are crucial for health and well-being. Pediatric burn injuries can have major physiological consequences in both the short and long term. The question is whether these consequences affect post burn PA levels. This study therefore aimed to describe PA and sedentary behavior (SB) in children and adolescents 1-5 years after burn injury. Methods: Daily PA and SB were monitored in 20 children and adolescents (12 boys and 8 girls, aged 6-17 years, with burns covering 10-37% of total body surface area, 1-5 years post burn) for 1 week using the ActiGraph GTX3+ accelerometer...
2018: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29447185/egg-turning-behavior-and-incubation-temperature-in-forster-s-terns-in-relation-to-mercury-contamination
#10
Gregory T Taylor, Joshua T Ackerman, Scott A Shaffer
Egg turning behavior is an important determinant of egg hatchability, but it remains relatively understudied. Here, we examined egg turning rates and egg temperatures in Forster's terns (Sterna forsteri). We used artificial eggs containing a data logger with a 3-D accelerometer, a magnetometer, and a temperature thermistor to monitor parental incubation behavior of 131 tern nests. Overall, adults turned their eggs an average (±SD) of 3.8 ± 0.8 turns h-1, which is nearly two times higher than that of other seabirds...
2018: PloS One
https://www.readbyqxmd.com/read/29445903/movement-kinematics-dynamically-modulates-the-rolandic-20-hz-rhythm-during-goal-directed-executed-and-observed-hand-actions
#11
B Marty, M Bourguignon, V Jousmäki, V Wens, S Goldman, X De Tiège
This study investigates whether movement kinematics modulates similarly the rolandic α and β rhythm amplitude during executed and observed goal-directed hand movements. It also assesses if this modulation relates to the corticokinematic coherence (CKC), which is the coupling observed between cortical activity and movement kinematics during such motor actions. Magnetoencephalography (MEG) signals were recorded from 11 right-handed healthy subjects while they performed or observed an actor performing the same repetitive hand pinching action...
February 14, 2018: Brain Topography
https://www.readbyqxmd.com/read/29444848/a-miniaturized-threshold-triggered-acceleration-data-logger-for-recording-burst-movements-of-aquatic-animals
#12
Nozomi Nishiumi, Ayane Matsuo, Ryo Kawabe, Nicholas Payne, Charlie Huveneers, Yuuki Y Watanabe, Yuuki Kawabata
Although animal-borne accelerometers are effective tools for quantifying the kinematics of animal behaviors, quantifying burst movements of small and agile aquatic animals remains challenging. To capture the details of burst movements, accelerometers need to sample at a very high frequency, which will inevitably shorten the recording duration or increase the device size. To overcome this problem, we developed a high-frequency acceleration data-logger that can be triggered by a manually-defined acceleration threshold, thus allowing the selective measurement of burst movements...
February 14, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29444169/monitoring-chest-compression-quality-during-cardiopulmonary-resuscitation-proof-of-concept-of-a-single-accelerometer-based-feedback-algorithm
#13
Digna María González-Otero, Jesus María Ruiz, Sofía Ruiz de Gauna, Jose Julio Gutiérrez, Mohamud Daya, James Knox Russell, Izaskun Azcarate, Mikel Leturiondo
BACKGROUND: The use of real-time feedback systems to guide rescuers during cardiopulmonary resuscitation (CPR) significantly contributes to improve adherence to published resuscitation guidelines. Recently, we designed a novel method for computing depth and rate of chest compressions relying solely on the spectral analysis of chest acceleration. That method was extensively tested in a simulated manikin scenario. The purpose of this study is to report the results of this method as tested in human out-of-hospital cardiac arrest (OHCA) cases...
2018: PloS One
https://www.readbyqxmd.com/read/29443824/improving-hip-worn-accelerometer-estimates-of-sitting-using-machine-learning-methods
#14
Jacqueline Kerr, Jordan Carlson, Suneeta Godbole, Lisa Cadmus-Bertram, John Bellettiere, Sheri Hartman
PURPOSE: To improve estimates of sitting time from hip worn accelerometers used in large cohort studies by employing machine learning methods developed on free living activPAL data. METHODS: Thirty breast cancer survivors concurrently wore a hip worn accelerometer and a thigh worn activPAL for 7 days. A random forest classifier, trained on the activPAL data, was employed to detect sitting, standing and sit-stand transitions in 5 second windows in the hip worn accelerometer...
February 13, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29440040/objectively-measured-physical-activity-sedentary-behaviour-and-all-cause-mortality-in-older-men-does-volume-of-activity-matter-more-than-pattern-of-accumulation
#15
Barbara J Jefferis, Tessa J Parsons, Claudio Sartini, Sarah Ash, Lucy T Lennon, Olia Papacosta, Richard W Morris, S Goya Wannamethee, I-Min Lee, Peter H Whincup
OBJECTIVES: To understand how device-measured sedentary behaviour and physical activity are related to all-cause mortality in older men, an age group with high levels of inactivity and sedentary behaviour. METHODS: Prospective population-based cohort study of men recruited from 24 UK General Practices in 1978-1980. In 2010-2012, 3137 surviving men were invited to a follow-up, 1655 (aged 71-92 years) agreed. Nurses measured height and weight, men completed health and demographic questionnaires and wore an ActiGraph GT3x accelerometer...
February 12, 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29439704/novel-patterns-of-physical-activity-in-a-large-sample-of-preschool-aged-children
#16
Rachel M Ruiz, Evan C Sommer, Dustin Tracy, Jorge A Banda, Christina D Economos, Megan M JaKa, Kelly R Evenson, Maciej S Buchowski, Shari L Barkin
BACKGROUND: Moderate-to-vigorous physical activity (MVPA), shown to be associated with health benefits, is not well-characterized in preschool-aged children. MVPA is commonly described as a threshold amount to achieve. We examined a novel way to characterize MVPA patterns in preschool-aged children by gender and age. METHODS: Preschool-aged children from Nashville, TN and Minneapolis, MN wore triaxial accelerometers. Four distinct MVPA patterns were identified: isolated spurt (IS), isolated sustained activity (ISA), clustered spurt (CS), and clustered sustained activity (CSA)...
February 13, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29434422/validity-of-the-fitbit-one-for-measuring-activity-in-community-dwelling-stroke-survivors
#17
Jonathan Hui, Richard Heyden, Tim Bao, Nicholas Accettone, Catherine McBay, Julie Richardson, Ada Tang
Purpose: We determined the correlation between the Fitbit One and Actical accelerometer for quantifying the 3-day step count and activity levels in community-dwelling individuals with stroke. Method: Twelve participants with a mean age of 62.6 (SD 9.3) years wore both the Fitbit One and the Actical on the non-paretic ankle for 3 days. Regression analyses were performed to examine concurrent validity between the devices for step counts and sedentary, light, moderate, and vigorous activity. The relative error of the Fitbit One compared with the Actical in measuring step count was calculated...
2018: Physiotherapy Canada. Physiothérapie Canada
https://www.readbyqxmd.com/read/29434419/physical-activity-of-icu-survivors-during-acute-admission-agreement-of-the-activpal-with-observation
#18
Claire E Baldwin, Kylie N Johnston, Alex V Rowlands, Marie T Williams
Purpose: We estimated the agreement of a thigh-worn accelerometer, the activPAL, used to measure activity and sedentary parameters, with observed mobility assessments of intensive care unit (ICU) survivors. Method: We prospectively compared activPAL measurements with direct observation during assessments at discharge from the ICU or acute hospital in eight participants with a median age of 56 (1st-3rd quartile 48-65) years and an Acute Physiology and Chronic Health Evaluation II score of 23 (1st-3rd quartile 17-24)...
2018: Physiotherapy Canada. Physiothérapie Canada
https://www.readbyqxmd.com/read/29434193/absolute-marine-gravimetry-with-matter-wave-interferometry
#19
Y Bidel, N Zahzam, C Blanchard, A Bonnin, M Cadoret, A Bresson, D Rouxel, M F Lequentrec-Lalancette
Measuring gravity from an aircraft or a ship is essential in geodesy, geophysics, mineral and hydrocarbon exploration, and navigation. Today, only relative sensors are available for onboard gravimetry. This is a major drawback because of the calibration and drift estimation procedures which lead to important operational constraints. Atom interferometry is a promising technology to obtain onboard absolute gravimeter. But, despite high performances obtained in static condition, no precise measurements were reported in dynamic...
February 12, 2018: Nature Communications
https://www.readbyqxmd.com/read/29433516/a-technical-review-and-evaluation-of-implantable-sensors-for-hearing-devices
#20
REVIEW
Diego Calero, Stephan Paul, André Gesing, Fabio Alves, Júlio A Cordioli
Most commercially available cochlear implants and hearing aids use microphones as sensors for capturing the external sound field. These microphones are in general located in an external element, which is also responsible for processing the sound signal. However, the presence of the external element is the cause of several problems such as discomfort, impossibility of being used during physical activities and sleeping, and social stigma. These limitations have driven studies with the goal of developing totally implantable hearing devices, and the design of an implantable sensor has been one of the main challenges to be overcome...
February 13, 2018: Biomedical Engineering Online
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