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JOURNAL ARTICLE
K A Meredith-Jones, J J Haszard, A Graham-DeMello, A Campbell, T Stewart, B C Galland, A Cox, G Kennedy, S Duncan, R W Taylor
BACKGROUND: Actigraphy is often used to measure sleep in pediatric populations, despite little confirmatory evidence of the accuracy of existing sleep/wake algorithms. The aim of this study was to determine the performance of 11 sleep algorithms in relation to overnight polysomnography in children and adolescents. METHODS: One hundred thirty-seven participants aged 8-16 years wore two Actigraph wGT3X-BT (wrist, waist) and three Axivity AX3 (wrist, back, thigh) accelerometers over 24-h...
April 16, 2024: International Journal of Behavioral Nutrition and Physical Activity
#2
JOURNAL ARTICLE
Hamed Hasani, Francesco Freddi, Riccardo Piazza, Fabio Ceruffi
This paper illustrates a novel and cost-effective wireless monitoring system specifically developed for operational modal analysis of bridges. The system employs battery-powered wireless sensors based on MEMS accelerometers that dynamically balance power consumption with high processing features and a low-power, low-cost Wi-Fi module that ensures operation for at least five years. The paper focuses on the system's characteristics, stressing the challenges of wireless communication, such as data preprocessing, synchronization, system lifetime, and simple configurability, achieved through the integration of a user-friendly, web-based graphical user interface...
March 26, 2024: Sensors
#3
JOURNAL ARTICLE
Tomoyuki Kawada
No abstract text is available yet for this article.
April 12, 2024: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
#4
JOURNAL ARTICLE
Le Huang, Keum San Chun, Lian Yu, Jong Yoon Lee, Alan Soetikno, Hope Chen, Hyoyoung Jeong, Joshua Barrett, Knute Martell, Youn Kang, Alpesh A Patel, Shuai Xu
INTRODUCTION: Cervical spine disease is a leading cause of pain and disability. Degenerative conditions of the spine can result in neurologic compression of the cervical spinal cord or nerve roots and may be surgically treated with an anterior cervical discectomy and fusion (ACDF) in up to 137,000 people per year in the United States. A common sequelae of ACDF is reduced cervical range of motion (CROM) with patient-based complaints of stiffness and neck pain. Currently, tools for assessment of CROM are manual, subjective, and only intermittently utilized during doctor or physical therapy visits...
2024: Digital Biomarkers
#5
JOURNAL ARTICLE
Robert M Gifford, N Taylor, A Carroll, J Sweeting, I T Parsons, M J Stacey, N Z M Homer, A Tsanas, D R Woods, R M Reynolds
INTRODUCTION: Measuring cortisol during military training offers insights into physiological responses to stress. We attempted precisely timed, cortisol awakening response (CAR) and pre-sleep cortisol (PSC), and diurnal slope (peak morning minus evening cortisol), during a British Army exercise. We aimed to understand cortisol dynamics and evaluate the feasibility of CAR and PSC in this environment. METHOD: Setting: high-intensity, 10-day infantry exercise. Participants: regular infantry soldiers exercising (EX, n=25) or headquarters-based (HQ, n=6)...
April 11, 2024: BMJ military health
#6
JOURNAL ARTICLE
J Clément, F Croteau, M Gagnon, S Cros
Greater impulse is a key performance indicator of success in short track speed skating. The main objective of this study was to develop a method to measure skating strokes using a single IMU. Eight elite or world-class speed skaters had one IMU placed against their skin on the lower back, and a camera setup was positioned to capture the test. A maximal speed trial was then executed by each participant, and the data were analysed to estimate agreement between the camera and IMU estimates of skate stroke events...
April 11, 2024: Sports Biomechanics
#7
JOURNAL ARTICLE
Jordi W J van Unnik, Myrte Meyjes, Mark R Janse van Mantgem, Leonard H van den Berg, Ruben P A van Eijk
BACKGROUND: There is an urgent need for objective and sensitive measures to quantify clinical disease progression and gauge the response to treatment in clinical trials for amyotrophic lateral sclerosis (ALS). Here, we evaluate the ability of an accelerometer-derived outcome to detect differential clinical disease progression and assess its longitudinal associations with overall survival in patients with ALS. METHODS: Patients with ALS wore an accelerometer on the hip for 3-7 days, every 2-3 months during a multi-year observation period...
April 5, 2024: EBioMedicine
#8
JOURNAL ARTICLE
Tatsuya Igarashi, Yuta Tani, Ren Takeda, Tomoyuki Asakura
BACKGROUND: Gait analysis using inertial measurement devices can identify multifaceted gait disorders after a stroke. Although the usefulness of gait assessment using inertial measurement devices has been reported, its accuracy in discriminating gait independence in patients hospitalized for subacute stroke has not yet been validated. RESEARCH QUESTION: Can trunk acceleration indices discriminate between dependent and independent walking in patients with subacute stroke? METHODS: Thirty-five patients with subacute stroke (mean ± standard deviation, 75...
April 2, 2024: Gait & Posture
#9
JOURNAL ARTICLE
Maximilian Knoll, Lorenz Gygax, Edna Hillmann
Accelerometers are useful in analyzing lying behavior in farm animals. The effect of the farrowing system on sow lying behavior has been studied around parturition, but not long-term. In a natural environment, sows increase activity 14 days post parturition, which we expected to be also evident in housed sows when they can move freely. The objective of this study was i) to validate the methodology to automatically measure sow lying bouts and duration with accelerometers and ii) to apply it to crated and free farrowing sows 24 hours pre-parturition until weaning...
April 6, 2024: Journal of Animal Science
#10
JOURNAL ARTICLE
Sietse E S Terpstra, Lotje A Hoogervorst, Jeroen H P M van der Velde, Renée de Mutsert, Lotte A van de Stadt, Frits R Rosendaal, Margreet Kloppenburg
OBJECTIVE: To investigate the construct validity of the SQUASH (Short QUestionnaire to ASsess Health-enhancing physical activity). DESIGN: This is a cross-sectional analysis using baseline measurements from middle-aged participants in the Netherlands Epidemiology of Obesity (NEO) study. The SQUASH consists of questions on eleven physical activities investigating days per week, average duration per day and intensity, leading to a summed score in Metabolic Equivalent of Task hours (MET h) per week...
June 2024: Osteoarthritis and cartilage open
#11
JOURNAL ARTICLE
Andrea Weber, Vincent T van Hees, Michael J Stein, Sylvia Gastell, Karen Steindorf, Florian Herbolsheimer, Stefan Ostrzinski, Tobias Pischon, Mirko Brandes, Lilian Krist, Michael Marschollek, Karin Halina Greiser, Katharina Nimptsch, Berit Brandes, Carmen Jochem, Anja M Sedlmeier, Klaus Berger, Hermann Brenner, Christoph Buck, Stefanie Castell, Marcus Dörr, Carina Emmel, Beate Fischer, Claudia Flexeder, Volker Harth, Antje Hebestreit, Jana-Kristin Heise, Bernd Holleczek, Thomas Keil, Lena Koch-Gallenkamp, Wolfgang Lieb, Claudia Meinke-Franze, Karin B Michels, Rafael Mikolajczyk, Alexander Kluttig, Nadia Obi, Annette Peters, Börge Schmidt, Sabine Schipf, Matthias B Schulze, Henning Teismann, Sabina Waniek, Stefan N Willich, Michael F Leitzmann, Hansjörg Baurecht
Large population-based cohort studies utilizing device-based measures of physical activity are crucial to close important research gaps regarding the potential protective effects of physical activity on chronic diseases. The present study details the quality control processes and the derivation of physical activity metrics from 100 Hz accelerometer data collected in the German National Cohort (NAKO). During the 2014 to 2019 baseline assessment, a subsample of NAKO participants wore a triaxial ActiGraph accelerometer on their right hip for seven consecutive days...
April 4, 2024: Scientific Reports
#12
JOURNAL ARTICLE
Long Yin, Fang Li, Pan Liu, Zhiqiang Yin, Zongyu Yang, Linchun Pi, Zan Gao
BACKGROUND: Limited research has explored the relationship between adhering to 24-h Movement Behaviour guidelines and mental health in Chinese preschool children. The objectives of this study encompassed two primary goals: (1) to investigate the adherence of preschool children in China to the 24-h Movement Behaviour guidelines; and (2) to analyze the relationship between fulfilling various combinations of these guidelines and mental health, identifying the most advantageous combination...
2024: Frontiers in Pediatrics
#13
Yonatan E Brand, Felix Kluge, Luca Palmerini, Anisoara Paraschiv-Ionescu, Clemens Becker, Andrea Cereatti, Walter Maetzler, Basil Sharrack, Beatrix Vereijken, Alison J Yarnall, Lynn Rochester, Silvia Del Din, Arne Muller, Aron S Buchman, Jeffrey M Hausdorff, Or Perlman
Progressive gait impairment is common in aging adults. Remote phenotyping of gait during daily living has the potential to quantify gait alterations and evaluate the effects of interventions that may prevent disability in the aging population. Here, we developed ElderNet, a self-supervised learning model for gait detection from wrist-worn accelerometer data. Validation involved two diverse cohorts, including over 1,000 participants without gait labels, as well as 83 participants with labeled data: older adults with Parkinson's disease, proximal femoral fracture, chronic obstructive pulmonary disease, congestive heart failure, and healthy adults...
March 15, 2024: Research Square
#14
JOURNAL ARTICLE
Xiaopan Hu, Simon Boisbluche, Kilian Philippe, Olivier Maurelli, Xiangyu Ren, Shichang Li, Bo Xu, Jacques Prioux
The positional workload characteristics in rugby union on three acquisition days (i.e. strength, endurance, and speed days) of tactical periodization are still relatively unknown. Therefore, the primary aim of this study was to shed light on the positional external workload variables (10 Hz Global Positioning System and accelerometer microtechnology) and internal workload indicators (the session rating of perceived exertion) of players in a professional rugby union team by utilizing and comparing two tactical periodization models...
2024: PloS One
#15
JOURNAL ARTICLE
Jose M Jimenez-Olmedo, Juan Tortosa-Martínez, Juan M Cortell-Tormo, Basilio Pueo
An observational, repeated measures design was used in this study to assess the validity of the Ergotex Inertial Measurement Unit (IMU) against a 3D motion capture system for measuring trunk, hip, and shoulder angles in ten healthy adult males (38.8 ± 7.3 y, bodyweight 79.2 ± 115.9 kg, body height 179.1 ± 8.1 cm). There were minimal systematic differences between the devices, with the most significant discrepancy being 1.4 degrees for the 80-degree target angle, denoting Ergotex's precision in joint angle measurements...
March 16, 2024: Sensors
#16
JOURNAL ARTICLE
Minh Long Hoang, Guido Matrella, Paolo Ciampolini
This work aims to compare the performance of Machine Learning (ML) and Deep Learning (DL) algorithms in detecting users' heartbeats on a smart bed. Targeting non-intrusive, continuous heart monitoring during sleep time, the smart bed is equipped with a 3D solid-state accelerometer. Acceleration signals are processed through an STM 32-bit microcontroller board and transmitted to a PC for recording. A photoplethysmographic sensor is simultaneously checked for ground truth reference. A dataset has been built, by acquiring measures in a real-world set-up: 10 participants were involved, resulting in 120 min of acceleration traces which were utilized to train and evaluate various Artificial Intelligence (AI) algorithms...
March 15, 2024: Sensors
#17
JOURNAL ARTICLE
Diego Muxica, Sebastian Rivera, Marcos E Orchard, Constanza Ahumada, Francisco Jaramillo, Felipe Bravo, José M Gutiérrez, Rodrigo Astroza
This paper presents the design, implementation, and validation of an on-blade sensor system for remote vibration measurement for low-capacity wind turbines. The autonomous sensor system was deployed on three wind turbines, with one of them operating in harsh weather conditions in the far south of Chile. The system recorded the acceleration response of the blades in the flapwise and edgewise directions, data that could be used for extracting the dynamic characteristics of the blades, information useful for damage diagnosis and prognosis...
March 7, 2024: Sensors
#18
JOURNAL ARTICLE
Cun Li, Hong Xue, Yulong Zhao
This paper describes the design, fabrication, and characterization of a quartz vibrating beam accelerometer consisting of a metal spring-mass and quartz double-ended tuning forks (DETFs). In this approach, the inertial force of the proof mass pulls or compresses the DETFs, affecting their resonance frequency and, thus, enabling the quasi-digital measurement of acceleration. An isolation structure was specifically designed to prevent the external interference stress from transforming into the DETFs and to decrease the DETFs' thermal stress as the ambient temperature changes...
March 1, 2024: Review of Scientific Instruments
#19
JOURNAL ARTICLE
Kazuhiro Harada, Kouhei Masumoto, Shuichi Okada
BACKGROUND: Although previous studies have shown that engaging in physical activity can elevate daily life satisfaction, few studies have identified the specific aspects that can result in this. This study examined whether enjoying moderate-to-vigorous intensity exercises with others for a longer time, but not any aspects of non-exercise physical activity, was associated with higher daily life satisfaction among older adults. METHOD: We conducted an intensive longitudinal diary survey of 182 individuals for 1 week and obtained valid data for 853 person-days...
March 19, 2024: International Journal of Behavioral Medicine
#20
REVIEW
Vera Birrer, Mohamed Elgendi, Olivier Lambercy, Carlo Menon
Sleep is crucial for physical and mental health, but traditional sleep quality assessment methods have limitations. This scoping review analyzes 35 articles from the past decade, evaluating 62 wearable setups with varying sensors, algorithms, and features. Our analysis indicates a trend towards combining accelerometer and photoplethysmography (PPG) data for out-of-lab sleep staging. Devices using only accelerometer data are effective for sleep/wake detection but fall short in identifying multiple sleep stages, unlike those incorporating PPG signals...
March 18, 2024: NPJ Digital Medicine
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