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https://www.readbyqxmd.com/read/29651510/-vomiting-and-collapse-of-a-28-year-old-male-long-distance-runner-in-middle-european-summer
#1
J Herold, A Mitrasch, E Lorenz, U Lodes, I Tanev, R Braun-Dullaeus, F Meyer
BACKGROUND: Hyperthermia often ends fatally and must therefore be promptly recognized and adequately treated. CASE: A 28-year-old man participated in a long-distance race (3 km) on a hot summer day (28 °C). The runner collapsed, had to vomit but continued the run and reached the finish. Neurologically, the patient presented with intermittent cerebral seizures. External cooling batteries were immediately applied and cold infusions were started. The patient was admitted to the intensive care unit of the university hospital (body temperature 40...
April 12, 2018: Der Internist
https://www.readbyqxmd.com/read/29650506/evaluating-the-validity-of-current-mainstream-wearable-devices-in-fitness-tracking-under-various-physical-activities-comparative-study
#2
Junqing Xie, Dong Wen, Lizhong Liang, Yuxi Jia, Li Gao, Jianbo Lei
BACKGROUND: Wearable devices have attracted much attention from the market in recent years for their fitness monitoring and other health-related metrics; however, the accuracy of fitness tracking results still plays a major role in health promotion. OBJECTIVE: The aim of this study was to evaluate the accuracy of a host of latest wearable devices in measuring fitness-related indicators under various seminatural activities. METHODS: A total of 44 healthy subjects were recruited, and each subject was asked to simultaneously wear 6 devices (Apple Watch 2, Samsung Gear S3, Jawbone Up3, Fitbit Surge, Huawei Talk Band B3, and Xiaomi Mi Band 2) and 2 smartphone apps (Dongdong and Ledongli) to measure five major health indicators (heart rate, number of steps, distance, energy consumption, and sleep duration) under various activity states (resting, walking, running, cycling, and sleeping), which were then compared with the gold standard (manual measurements of the heart rate, number of steps, distance, and sleep, and energy consumption through oxygen consumption) and calculated to determine their respective mean absolute percentage errors (MAPEs)...
April 12, 2018: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/29650412/theoretical-considerations-for-muscle-energy-savings-during-distance-running
#3
Jared R Fletcher, Brian R MacIntosh
We have recently demonstrated that the triceps surae muscles energy cost (ECTS ) represents a substantial portion of the total metabolic cost of running (Erun ). Therefore, it seems relevant to evaluate the factors which dictate ECTS , namely the amount and velocity of shortening, since it is likely these factors will dictate Erun . Erun and triceps surae morphological and AT mechanical properties were obtained in 46 trained and elite male and female distance runners using ultrasonography and dynamometry. ECTS (J·stride-1 ) at the speed of lactate threshold (sLT) was estimated from AT force and crossbridge mechanics and energetics...
March 27, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29644086/is-recreational-running-associated-with-earlier-delivery-and-lower-birth-weight-in-women-who-continue-to-run-during-pregnancy-an-international-retrospective-cohort-study-of-running-habits-of-1293-female-runners-during-pregnancy
#4
Katy Kuhrt, Mark Harmon, Natasha L Hezelgrave, Paul T Seed, Andrew H Shennan
Background: Increasingly, women of reproductive age participate in recreational running, but its impact on pregnancy outcome is unknown. We investigated whether running affects gestational age at delivery and birth weight as indicators of cervical integrity and placental function, respectively. Methods: 1293 female participants were recruited from parkrun, which organises weekly runs involving 1.25 million runners across 450 parks worldwide. Those under 16 or unable to provide outcome data were excluded...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29643814/impact-of-short-term-training-camp-on-aortic-blood-pressure-in-collegiate-endurance-runners
#5
Tsubasa Tomoto, Jun Sugawara, Ai Hirasawa, Tomoko Imai, Seiji Maeda, Shigehiko Ogoh
To investigate the influence of short-term vigorous endurance training on aortic blood pressure (BP), pulse wave analysis was performed in 36 highly trained elite collegiate endurance runners before and after a 7-day intense training camp. Subjects participated three training sessions per day, which mainly consisted of long distance running and sprint training to reach the daily target distance of 26 km. After the camp, they were divided into two groups based on whether the target training was achieved. Aortic systolic BP, pulse pressure, and tension-time index (TTI, a surrogate index of the myocardial oxygen demand) were significantly elevated after the camp in the accomplished group but not in the unaccomplished group, whereas the brachial BP remained unchanged in both groups...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29623809/participation-in-active-play-of-children-who-use-lower-extremity-prostheses-an-exploratory-questionnaire
#6
Cheryl Kerfeld, Tracy Jirikowic, Katheryn J Allyn, Murray E Maitland
BACKGROUND: Through play, children develop motor, cognitive, social, and other life skills. Play barriers can impede physical and psychosocial benefits. OBJECTIVES: We describe participation in active play, fundamental movement skills, play environment characteristics, and potential play barriers for school-aged children (6-12 years) who use lower extremity prostheses. STUDY DESIGN: Cross-sectional questionnaire study. METHODS: A questionnaire was developed and administered online to parents of children 6-12 years who use lower extremity prostheses...
April 1, 2018: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29623704/high-speed-cell-recognition-algorithm-for-ultrafast-flow-cytometer-imaging-system
#7
Wanyue Zhao, Chao Wang, Hongwei Chen, Minghua Chen, Sigang Yang
An optical time-stretch flow imaging system enables high-throughput examination of cells/particles with unprecedented high speed and resolution. A significant amount of raw image data is produced. A high-speed cell recognition algorithm is, therefore, highly demanded to analyze large amounts of data efficiently. A high-speed cell recognition algorithm consisting of two-stage cascaded detection and Gaussian mixture model (GMM) classification is proposed. The first stage of detection extracts cell regions. The second stage integrates distance transform and the watershed algorithm to separate clustered cells...
April 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29621499/new-insight-into-the-allosteric-effect-of-l-tyrosine-on-mushroom-tyrosinase-during-l-dopa-production
#8
Sorour Hassani, Behzad Gharechaei, Somayeh Nikfard, Mostafa Fazli, Nematollah Gheibi, Renaud Hardré, Raymond L Legge, Kamahldin Haghbeen
Kinetics studies of L-tyrosine (LTy) ortho-hydroxylation by mushroom tyrosinase (MT) confirmed that MT was severely, but not completely, inhibited at higher concentrations of LTy. Despite the availability of the crystal structure reports, no allosteric site has been identified on MT. To examine the assumption that a non-specific binding site works as a regulatory site, docking simulations were run for the second molecule of L-tyrosine (LTy2 ) on the complexes of the first L-tyrosine molecule (LTy1 ) with the heavy chain (H) of MT (LTy1 /HMT) and its dimer with the light chain (Ty1 /LHMT)...
April 2, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29621279/assessing-worst-case-scenarios-in-movement-demands-derived-from-global-positioning-systems-during-international-rugby-union-matches-rolling-averages-versus-fixed-length-epochs
#9
Daniel J Cunningham, David A Shearer, Neil Carter, Scott Drawer, Ben Pollard, Mark Bennett, Robin Eager, Christian J Cook, John Farrell, Mark Russell, Liam P Kilduff
The assessment of competitive movement demands in team sports has traditionally relied upon global positioning system (GPS) analyses presented as fixed-time epochs (e.g., 5-40 min). More recently, presenting game data as a rolling average has become prevalent due to concerns over a loss of sampling resolution associated with the windowing of data over fixed periods. Accordingly, this study compared rolling average (ROLL) and fixed-time (FIXED) epochs for quantifying the peak movement demands of international rugby union match-play as a function of playing position...
2018: PloS One
https://www.readbyqxmd.com/read/29616664/from-the-volcano-effect-to-banding-a-minimal-model-for-bacterial-behavioral-transitions-near-chemoattractant-sources
#10
Gregory Javens, Hossein Jashnsaz, Steve Pressé
Sharp chemoattractant (CA) gradient variations near food sources may give rise to dramatic behavioral changes of bacteria neighboring these sources. For instance, marine bacteria exhibiting <i>run-reverse</i> motility are known to form distinct bands around patches (large sources) of chemoattractant such as nutrient-soaked beads while <i>run-and-tumble</i> bacteria have been predicted to exhibit a "volcano effect" (spherical shell-shaped density) around a small (point) source of food...
April 4, 2018: Physical Biology
https://www.readbyqxmd.com/read/29614468/energy-expenditure-in-people-with-transtibial-amputation-walking-with-crossover-and-energy-storing-prosthetic-feet-a-randomized-within-subject-study
#11
Cody L McDonald, Patricia A Kramer, Sara J Morgan, Elizabeth G Halsne, Sarah M Cheever, Brian J Hafner
BACKGROUND: Energy storing feet are unable to reduce the energy required for normal locomotion among people with transtibial amputation. Crossover feet, which incorporate aspects of energy storing and running specific feet, are designed to maximize energy return while providing stability for everyday activities. RESEARCH QUESTION: Do crossover prosthetic feet reduce the energy expenditure of walking across a range of speeds, when compared with energy storing feet among people with transtibial amputation due to non-dysvascular causes? METHODS: A randomized within-subject study was conducted with a volunteer sample of twenty-seven adults with unilateral transtibial amputation due to non-dysvascular causes...
March 27, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29604955/multivariate-analysis-of-covariates-of-adherence-among-hiv-positive-mothers-with-low-viral-suppression
#12
Tamara Nsubuga-Nyombi, Simon Sensalire, Esther Karamagi, Judith Aloyo, John Byabagambi, Mirwais Rahimzai, Linda Kisaakye Nabitaka, Jacqueline Calnan
BACKGROUND: As part of efforts to improve the prevention of mother-to-child transmission in Northern Uganda, we explored reasons for poor viral suppression among 122 pregnant and lactating women who were in care, received viral load tests, but had not achieved viral suppression and had more than 1000 copies/mL. Understanding the patient factors associated with low viral suppression was of interest to the Ministry of Health to guide the development of tools and interventions to achieve viral suppression for pregnant and lactating women newly initiating on ART as well as those on ART with unsuppressed viral load...
March 31, 2018: AIDS Research and Therapy
https://www.readbyqxmd.com/read/29604894/potential-energy-surface-of-triplet-o-4
#13
Yuliya Paukku, Zoltan Varga, Donald G Truhlar
We present a global ground-state potential energy surface (PES) for the triplet spin state of O4 that is suitable for treating high-energy vibrational-rotational energy transfer and collision-induced dissociation in electronically adiabatic spin-conserving O2 -O2 collisions. The surface is based on MS-CASPT2/maug-cc-pVTZ electronic structure calculations with scaled external correlation; the active space has 16 electrons in 12 orbitals. The global ground-state potential energy surface was fitted by a many-body approach with an accurate O-O pairwise interaction and a fit of the many-body interaction potential to 10 180 electronic structure data points...
March 28, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29602001/introduction-of-a-novel-modification-in-laparoscopic-hysterectomy-the-bakay-technique
#14
Kadir Bakay
The last step of laparoscopic hysterectomy when the surgeon attempts to remove the uterus and close the vaginal cuff (colpotomy and cuff closure) is considered the most challenging part of the operation, and the procedure involves a steep learning curve for surgeons. Although various methods have been described and reviewed on vaginal cuff closure in laparoscopic hysterectomy, this study is the first to describe placing a single continuous running purse string suture using the uterine manipulator to maintain a safe distance between adjacent structures while facilitating the closure prior to colpotomy...
March 27, 2018: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/29601041/line-scan-spectrum-encoded-imaging-by-dual-comb-interferometry
#15
Chao Wang, Zejiang Deng, Chenglin Gu, Yang Liu, Daping Luo, Zhiwei Zhu, Wenxue Li, Heping Zeng
Herein, the method of spectrum-encoded dual-comb interferometry is introduced to measure a three-dimensional (3-D) profile with absolute distance information. By combining spectral encoding for wavelength-to-space mapping, dual-comb interferometry for decoding and optical reference for calibration, this system can obtain a 3-D profile of an object at a stand-off distance of 114 mm with a depth precision of 12 μm. With the help of the reference arm, the absolute distance, reflectivity distribution, and depth information are simultaneously measured at a 5 kHz line-scan rate with free-running carrier-envelope offset frequencies...
April 1, 2018: Optics Letters
https://www.readbyqxmd.com/read/29599872/responsiveness-of-the-countermovement-jump-and-handgrip-strength-to-an-incremental-running-test-in-endurance-athletes-influence-of-sex
#16
Felipe García-Pinillos, Pedro Delgado-Floody, Cristian Martínez-Salazar, Pedro Á Latorre-Román
The present study analyzed the acute effects of an incremental running test on countermovement jump (CMJ) and handgrip strength performance in endurance athletes, considering the effect of post-exercise recovery time and sex. Thirty-three recreationally trained long-distance runners, 20 men and 13 women, participated voluntarily in this study. The participants performed the Léger test, moreover, the CMJ and handgrip strength tests were carried out before and after the running test and during different stages of recovery (at the 1st min of recovery (posttest1), 5th min of recovery (posttest2), and 10th min of recovery (posttest3))...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599725/validity-and-reliability-of-10-hz-global-positioning-system-to-assess-in-line-movement-and-change-of-direction
#17
Pantelis T Nikolaidis, Filipe M Clemente, Cornelis M I van der Linden, Thomas Rosemann, Beat Knechtle
The objectives of the present study were to examine the validity and reliability of the 10 Hz Johan GPS unit in assessing in-line movement and change of direction. The validity was tested against the criterion measure of 200 m track-and-field (track-and-field athletes, n = 8) and 20 m shuttle run endurance test (female soccer players, n = 20). Intra-unit and inter-unit reliability was tested by intra-class correlation coefficient (ICC) and coefficient of variation (CV), respectively. An analysis of variance examined differences between the GPS measurement and five laps of 200 m at 15 km/h, and t -test examined differences between the GPS measurement and 20 m shuttle run endurance test...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29597163/impact-of-highway-construction-on-land-surface-energy-balance-and-local-climate-derived-from-landsat-satellite-data
#18
Václav Nedbal, Jakub Brom
Extensive construction of highways has a major impact on the landscape and its structure. They can also influence local climate and heat fluxes in the surrounding area. After the removal of vegetation due to highway construction, the amount of solar radiation energy used for plant evapotranspiration (latent heat flux) decreases, bringing about an increase in landscape surface temperature, changing the local climate and increasing surface run-off. In this study, we evaluated the impact of the D8 highway construction (Central Bohemia, Czech Republic) on the distribution of solar radiation energy into the various heat fluxes (latent, sensible and ground heat flux) and related surface functional parameters (surface temperature and surface wetness)...
March 26, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29589565/detangling-ppi-networks-to-uncover-functionally-meaningful-clusters
#19
Sarah Hall-Swan, Jake Crawford, Rebecca Newman, Lenore J Cowen
BACKGROUND: Decomposing a protein-protein interaction network (PPI network) into non-overlapping clusters or communities, sometimes called "network modules," is an important way to explore functional roles of sets of genes. When the method to accomplish this decomposition is solely based on purely graph-theoretic measures of the interconnection structure of the network, this is often called unsupervised clustering or community detection. In this study, we compare unsupervised computational methods for decomposing a PPI network into non-overlapping modules...
March 21, 2018: BMC Systems Biology
https://www.readbyqxmd.com/read/29577657/fast-uncertainty-quantification-of-activation-sequences-in-patient-specific-cardiac-electrophysiology-meeting-clinical-time-constraints
#20
A Quaglino, S Pezzuto, P-S Koutsourelakis, A Auricchio, R Krause
We present a fast, patient-specific methodology for uncertainty quantification in electrophysiology, aimed at meeting the time constraints of clinical practitioners. We focus on computing the statistics of the activation map, given the uncertainties associated with the conductivity tensor modeling the fibers orientation in the heart. We employ a fast parallel solution method implemented on a GPU for the eikonal approximation, in order to compute the activation map and to sample the random fiber field with correlation based on geodesic distances...
March 26, 2018: International Journal for Numerical Methods in Biomedical Engineering
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