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Tracking Fatigue

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https://www.readbyqxmd.com/read/28081144/digital-health-tracking-physiomes-and-activity-using-wearable-biosensors-reveals-useful-health-related-information
#1
Xiao Li, Jessilyn Dunn, Denis Salins, Gao Zhou, Wenyu Zhou, Sophia Miryam Schüssler-Fiorenza Rose, Dalia Perelman, Elizabeth Colbert, Ryan Runge, Shannon Rego, Ria Sonecha, Somalee Datta, Tracey McLaughlin, Michael P Snyder
A new wave of portable biosensors allows frequent measurement of health-related physiology. We investigated the use of these devices to monitor human physiological changes during various activities and their role in managing health and diagnosing and analyzing disease. By recording over 250,000 daily measurements for up to 43 individuals, we found personalized circadian differences in physiological parameters, replicating previous physiological findings. Interestingly, we found striking changes in particular environments, such as airline flights (decreased peripheral capillary oxygen saturation [SpO2] and increased radiation exposure)...
January 2017: PLoS Biology
https://www.readbyqxmd.com/read/28068294/canine-olfaction-as-an-alternative-to-analytical-instruments-for-disease-diagnosis-understanding-dog-personality-to-achieve-reproducible-results
#2
Klaus Hackner, Joachim Pleil
Recent literature has touted the use of canine olfaction as a diagnostic tool for identifying pre-clinical disease status, especially cancer and infection from biological media samples. Studies have shown a wide range of outcomes, ranging from almost perfect discrimination, all the way to essentially random results. This disparity is not likely to be a detection issue; dogs have been shown to have extremely sensitive noses as proven by their use for tracking, bomb detection and search and rescue. However, in contrast to analytical instruments, dogs are subject to boredom, fatigue, hunger and external distractions...
January 9, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28064032/tmj-energy-densities-in-healthy-men-and-women
#3
L R Iwasaki, Y M Gonzalez, Y Liu, H Liu, M Markova, L M Gallo, J C Nickel
OBJECTIVE: Cartilage fatigue, due to mechanical work, may account for the early development of degenerative joint disease in the temporomandibular joint (TMJ), and why women are 3-times more likely to be afflicted. This study tested for gender differences in mechanical energy densities in women and men with healthy TMJs. DESIGN: Eighteen women and eighteen men gave informed consent. Research diagnostic criteria including imaging were used to ensure that subjects' TMJs were normal, without disc displacement or signs of degenerative joint disease...
January 4, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28054815/try-to-look-on-the-bright-side-children-and-adults-can-sometimes-override-their-tendency-to-prioritize-negative-faces
#4
Kristin Hansen Lagattuta, Hannah J Kramer
We used eye tracking to examine 4- to 10-year-olds' and adults' (N = 173) visual attention to negative (anger, fear, sadness, disgust) and neutral faces when paired with happy faces in 2 experimental conditions: free-viewing ("look at the faces") and directed ("look only at the happy faces"). Regardless of instruction, all age groups more often looked first to negative versus positive faces (no age differences), suggesting that initial orienting is driven by bottom-up processes. In contrast, biases in more sustained attention-last looks and looking duration-varied by age and could be modified by top-down instruction...
January 2017: Journal of Experimental Psychology. General
https://www.readbyqxmd.com/read/28048139/su-f-j-227-accuracy-of-passive-magnetic-ultrasound-needle-guidance-in-high-fidelity-conventional-and-novel-simulated-block-approach-phantoms
#5
A Johnson
PURPOSE: The objective of this research was to demonstrate accuracy of a real-time passive ultrasound magnetic needle guidance technology (NGT) and target localization algorithm using conventional anechogenic contact phantoms and a novel fluid-filled hyperechogenic phantom simulating nerve block technique. METHODS: Accuracy (mm to phantom target) was assessed by observing 35 medical practitioners (16 anesthesiologists and 19 residents) performing 560 needle procedures in high-fidelity ex vivo porcine tissue phantoms...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28028197/limited-cognitive-resources-explain-a-tradeoff-between-perceptual-and-metacognitive-vigilance
#6
Brian Maniscalco, Li Yan McCurdy, Brian Odegaard, Hakwan Lau
: Why do experimenters give subjects short breaks in long behavioral experiments? Whereas earlier studies suggest it is difficult to maintain attention and vigilance over long periods of time, it is unclear precisely what mechanisms benefit from rest after short experimental blocks. Here, we evaluate decline in both perceptual performance and metacognitive sensitivity (i.e., how well confidence ratings track perceptual decision accuracy) over time, and investigate whether characteristics of prefrontal cortical areas correlate with these measures...
December 27, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28018244/differences-in-muscle-oxygenation-perceived-fatigue-and-recovery-between-long-track-and-short-track-speed-skating
#7
Florentina J Hettinga, Marco J Konings, Chris E Cooper
Due to the technical nature of speed skating, that is affecting physiological mechanisms such as oxygenation and blood flow, this sport provides a unique setting allowing us to uncover novel mechanistic insights of the physiological response to exercise in elite middle-distance and endurance sports. The present study aimed to examine the influence of skating mode (short-track vs. long-track) on muscle oxygenation, perceived fatigue, and recovery in elite speed skating. Muscle oxygenation of 12 talented short-track speed skaters was continuously monitored during a long-track (LT) and a short-track (ST) skating time-trial of maximal effort using near-infrared spectroscopy (NIRS) on the m...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27998687/effects-of-applied-stress-ratio-on-the-fatigue-behavior-of-additively-manufactured-porous-biomaterials-under-compressive-loading
#8
Joep de Krijger, Calvin Rans, Brecht Van Hooreweder, Karel Lietaert, Behdad Pouran, Amir A Zadpoor
Additively manufactured (AM) porous metallic biomaterials are considered promising candidates for bone substitution. In particular, AM porous titanium can be designed to exhibit mechanical properties similar to bone. There is some experimental data available in the literature regarding the fatigue behavior of AM porous titanium, but the effect of stress ratio on the fatigue behavior of those materials has not been studied before. In this paper, we study the effect of applied stress ratio on the compression-compression fatigue behavior of selective laser melted porous titanium (Ti-6Al-4V) based on the diamond unit cell...
December 7, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27987454/patient-reported-outcomes-in-ductal-carcinoma-in-situ-a-systematic-review
#9
REVIEW
Madeleine T King, Zoë E Winters, Ivo A Olivotto, Andrew J Spillane, Boon H Chua, Christobel Saunders, A Helen Westenberg, G Bruce Mann, Petrina Burnett, Phyllis Butow, Claudia Rutherford
Ductal carcinoma in situ (DCIS) is a pre-invasive breast cancer with excellent prognosis but with potential adverse impacts of diagnosis and treatment on quality of life and other patient-reported outcomes (PROs). We undertook a systematic review to synthesise current evidence about PROs following diagnosis and treatment for DCIS. We searched five electronic databases (from database inception to November 2015), cross-referenced and contacted experts to identify studies that reported PROs after DCIS treatment...
January 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/27979832/cellular-senescence-promotes-adverse-effects-of-chemotherapy-and-cancer-relapse
#10
Marco Demaria, Monique N O'Leary, Jianhui Chang, Lijian Shao, Su Liu, Fatouma Alimirah, Kristin Koenig, Catherine Le, Natalia Mitin, Allison M Deal, Shani Alston, Emmeline C Academia, Sumner Kilmarx, Alexis Valdovinos, Boshi Wang, Alain de Bruin, Brian K Kennedy, Simon Melov, Daohong Zhou, Norman E Sharpless, Hyman Muss, Judith Campisi
Cellular senescence suppresses cancer by irreversibly arresting cell proliferation. Senescent cells acquire a pro-inflammatory senescence-associated secretory phenotype. Many genotoxic chemotherapies target proliferating cells non-specifically, often with adverse reactions. In accord with prior work, we show that several chemotherapeutic drugs induce senescence of primary murine and human cells. Using a transgenic mouse that permits tracking and eliminating senescent cells, we show that therapy-induced senescent (TIS) cells persist and contribute to local and systemic inflammation...
December 15, 2016: Cancer Discovery
https://www.readbyqxmd.com/read/27973384/effects-of-fatiguing-constant-versus-alternating-intensity-intermittent-isometric-muscle-actions-on-maximal-torque-and-neuromuscular-responses
#11
C M Smith, T J Housh, E C Hill, K C Cochrane, N Dm Jenkins, R J Schmidt, G O Johnson
OBJECTIVE: To determine the effects of constant versus alternating applications of torque during fatiguing, intermittent isometric muscle actions of the leg extensors on maximal voluntary isometric contraction (MVIC) torque and neuromuscular responses. METHODS: Sixteen subjects performed two protocols, each consisting of 50 intermittent isometric muscle actions of the leg extensors with equal average load at a constant 60% MVIC or alternating 40 then 80% (40/80%) MVIC with a work-to-rest ratio of 6-s on and 2-s off...
December 14, 2016: Journal of Musculoskeletal & Neuronal Interactions
https://www.readbyqxmd.com/read/27925635/fatigue-detection-using-phase-space-warping
#12
Abdullatif Alwasel, Marcus Yung, Eihab Abdel-Rahman, Richard P Wells, Carl T Haas
A novel application of Phase-Space Warping (PSW) method to detect fatigue in the musculoskeletal system is presented. Experimental kinematic, force, and physiological signals are used to produce a fatigue metric. The metric is produced using time-delay embedding and PSW methods. Results showed that by using force and kinematic signals, an overall estimate of the muscle group state can be achieved. Further, when using electromyography (EMG) signals the fatigue metric can be used as a tool to evaluate muscles activation and load sharing patterns for individual muscles...
December 7, 2016: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/27918655/activity-profiles-and-positional-differences-of-handball-players-during-the-world-championships-in-qatar-2015
#13
Marco Cardinale, Rodney Whiteley, Ahmed Abdelrahman Hosny, Nebojsa Popovic
PURPOSE: Handball is an Olympic sport played indoor by 6 court players and one goalkeeper with rolling substitutions. Limited data exist on elite players competing in a World Championship and virtually no information exits on the evolution of time-motion performance over the course of a long tournament. Therefore, the aim of this study was to analyze time motion characteristics of elite male handball players of the last World Championships played in Qatar in 2015. METHODS: 384 Players from 24 national teams were analyzed during 88 matches using a tracking camera system and a bespoke software (Prozone Handball V...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27898382/towards-real-time-estimation-of-muscle-fiber-conduction-velocity-using-delay-locked-loop
#14
Lin Xu, Chiara Rabotti, Massimo Mischi
Decrease in muscle-fiber conduction velocity (MFCV) during sustained contraction has been widely accepted as myoelectric manifestation of muscle fatigue. Several methods have been proposed in the literature for MFCV estimation by analysing surface electromyography (EMG), e.g., cross-correlation (CC) function and maximum likelihood (ML). However, for all the available methods, windowing of the EMG signal and computationally demanding calculations are required, limiting the possibility to continuously monitor muscle fatigue in real time...
November 24, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27895218/a-new-approach-to-identify-high-burnout-medical-staffs-by-kernel-k-means-cluster-analysis-in-a-regional-teaching-hospital-in-taiwan
#15
Yii-Ching Lee, Shian-Chang Huang, Chih-Hsuan Huang, Hsin-Hung Wu
This study uses kernel k-means cluster analysis to identify medical staffs with high burnout. The data collected in October to November 2014 are from the emotional exhaustion dimension of the Chinese version of Safety Attitudes Questionnaire in a regional teaching hospital in Taiwan. The number of effective questionnaires including the entire staffs such as physicians, nurses, technicians, pharmacists, medical administrators, and respiratory therapists is 680. The results show that 8 clusters are generated by kernel k-means method...
2016: Inquiry: a Journal of Medical Care Organization, Provision and Financing
https://www.readbyqxmd.com/read/27891670/biomechanical-behavior-of-novel-composite-pmma-cap-bone-cements-in-an-anatomically-accurate-cadaveric-vertebroplasty-model
#16
Shant Aghyarian, Xiaobang Hu, Ram Haddas, Isador H Lieberman, Victor Kosmopoulos, Harry K W Kim, Danieli C Rodrigues
Vertebral compression fractures are caused by many factors including trauma and osteoporosis. Osteoporosis induced fractures are a result of loss in bone mass and quality that weaken the vertebral body. Vertebroplasty and kyphoplasty, involving cement augmentation of fractured vertebrae, show promise in restoring vertebral mechanical properties. Some complications however, are reported due to the performance characteristics of commercially available bone cements. In this study, the biomechanical performance characteristics of two novel composite (PMMA-CaP) bone cements were studied using an anatomically accurate human cadaveric vertebroplasty model...
November 27, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27872598/futsal-match-related-fatigue-affects-running-performance-and-neuromuscular-parameters-but-not-finishing-kick-speed-or-accuracy
#17
Fabio Milioni, Luiz H P Vieira, Ricardo A Barbieri, Alessandro M Zagatto, Nikolai B Nordsborg, Fabio A Barbieri, Júlio W Dos-Santos, Paulo R P Santiago, Marcelo Papoti
Purpose: The aim of the present study was to investigate the influence of futsal match-related fatigue on running performance, neuromuscular variables, and finishing kick speed and accuracy. Methods: Ten professional futsal players participated in the study (age: 22.2 ± 2.5 years) and initially performed an incremental protocol to determine maximum oxygen uptake ([Formula: see text]: 50.6 ± 4.9 mL.kg(-1).min(-1)). Next, simulated games were performed, in four periods of 10 min during which heart rate and blood lactate concentration were monitored...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27855740/orthosomnia-are-some-patients-taking-the-quantified-self-too-far
#18
Kelly Glazer Baron, Sabra Abbott, Nancy Jao, Natalie Manalo, Rebecca Mullen
The use of wearable sleep tracking devices is rapidly expanding and provides an opportunity to engage individuals in monitoring of their sleep patterns. However, there are a growing number of patients who are seeking treatment for self-diagnosed sleep disturbances such as insufficient sleep duration and insomnia due to periods of light or restless sleep observed on their sleep tracker data. The patients' inferred correlation between sleep tracker data and daytime fatigue may become a perfectionistic quest for the ideal sleep in order to optimize daytime function...
November 14, 2016: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/27825568/osteoarticular-manifestations-of-celiac-disease-and-non-celiac-gluten-hypersensitivity
#19
Stéphanie Dos Santos, Frédéric Lioté
Celiac disease is a chronic inflammatory autoimmune enteropathy based disorder that is triggered by the ingestion of gluten in genetically susceptible individuals. The global prevalence of 1% to 2% represents only the tip of the iceberg. The diagnosis is confirmed by positive specific antibody, anti-transglutaminase or anti-endomysium, specific lesions of the small intestine and a response to strict gluten-free diet. The diagnosis is difficult and often delayed because the clinical variability is very large, ranging from digestive clinical presentation "classic" to "atypical" symptoms, often extra-intestinal, that are sometimes attributed to a concomitant disease or a complication...
November 4, 2016: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/27755335/fat%C3%A4-gue-fa%C3%A4-lure-in-extra-art%C3%A4-cular-prox%C3%A4-mal-t%C3%A4-b%C3%A4-a-fractures-lock%C3%A4-ng-%C3%A4-ntramedullary-na%C3%A4-l-vs-double-lock%C3%A4-ng-plates
#20
Utku Kandemir, Safa Herfat, Mary Herzog, Paul Viscogliosi, Murat Pekmezci
OBJECTIVES: The goal of this study is to compare the fatigue strength of a locking intramedullary nail (LN) construct to a double locking plate (DLP) construct in comminuted proximal extra-articular tibia fractures. METHODS: Eight pairs of fresh frozen cadaveric tibias with low bone mineral density (Age: 80 ± 7 (SD) years, T-score: -2.3 ± 1.2) were used. One tibia from each pair was fixed with LN while the contralateral side was fixed with DLP for complex extra-articular multifragmentary, metaphyseal fractures (simulating OTA41-A3...
October 7, 2016: Journal of Orthopaedic Trauma
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