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https://www.readbyqxmd.com/read/28210643/perception-of-health-problems-among-competitive-runners-a-qualitative-study-of-cognitive-appraisals-and-behavioral-responses
#1
Sara Jelvegård, Toomas Timpka, Victor Bargoria, Håkan Gauffin, Jenny Jacobsson
BACKGROUND: Approximately 2 of every 3 competitive runners sustain at least 1 health problem each season. Most of these problems are nontraumatic injuries with gradual onset. The main known risk indicator for sustaining a new running-related injury episode is a history of a previous injury, suggesting that behavioral habits are part of the causal mechanisms. PURPOSE: Identification of elements associated with purposeful interpretations of body perceptions and balanced behavioral responses may supply vital information for prevention of health problems in runners...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28207880/skeletal-muscle-metabolic-adaptations-to-endurance-exercise-training-are-attainable-in-mice-with-simvastatin-treatment
#2
William M Southern, Anna S Nichenko, Daniel D Shill, Corey C Spencer, Nathan T Jenkins, Kevin K McCully, Jarrod A Call
We tested the hypothesis that a 6-week regimen of simvastatin would attenuate skeletal muscle adaptation to low-intensity exercise. Male C57BL/6J wildtype mice were subjected to 6-weeks of voluntary wheel running or normal cage activities with or without simvastatin treatment (20 mg/kg/d, n = 7-8 per group). Adaptations in in vivo fatigue resistance were determined by a treadmill running test, and by ankle plantarflexor contractile assessment. The tibialis anterior, gastrocnemius, and plantaris muscles were evaluated for exercised-induced mitochondrial adaptations (i...
2017: PloS One
https://www.readbyqxmd.com/read/28195301/people-choose-to-run-at-their-optimal-speed
#3
Joseph K Rathkey, Cara M Wall-Scheffler
OBJECTIVES: The purpose of this article is to test whether people choose to behave in a manner that reduces the amount of energy they use to travel a given distance. While this has been shown consistently for walking, it has never been tested with human running. MATERIALS AND METHODS: We collected energetic data and lower limb anthropometrics on nine men running at six different running speeds. We collected on all six speeds on 3 different days and took the average of the energetic values for each speed...
February 14, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28167230/adaptation-to-a-blood-pressure-telemetry-system-revealed-by-measures-of-activity-agility-and-operant-learning-in-mice
#4
Anfisa Popova, Darya Tsvirkun, Oleg Dolgov, Konstantin Anokhin, Jeffrey Alberts, Evgeniia Lagereva, Marc-Antoine Custaud, Guillemette Gauquelin-Koch, Olga Vinogradova, Alexander Andreev-Andrievskiy
INTRODUCTION: Implantable telemetry enables continuous monitoring of physiological functions in freely moving animals and can greatly complement pharmacological research. Despite its miniaturization, a sensor/transmitter constitutes 5% or more of a mouse's bodyweight. The aim of the present study was to evaluate whether factors related to the presence of a probe/transmitter influence the ambulatory activity, strength, agility, or operant, motivated behaviors of this small rodent. METHODS: Adult male mice (C57BL/6N, 22-25g, 9-10weeks; implanted n=26, intact n=45) were evaluated during week-long tests, conducted three and eight weeks after surgical implantation of the PA-C10 blood pressure probe...
February 3, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/28136131/is-marathon-running-toxic-an-observational-study-of-cardiovascular-disease-prevalence-and-longevity-in-54-male-marathon-runners
#5
Benjamin Rosin
OBJECTIVES: Recent literature suggests reduced benefits associated with high intensity (HIT) and or sustained intensity exercise training (SIT). While important, they tend to contrast with other studies of HIT and SIT and may not be representative of all individuals wishing to participate in activities such as marathon running. The purpose of this observational report is to describe a 45-year history of 54 long distance runners, their incidence of death from cardiovascular disease and their ages at death compared to the normal population...
January 30, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28117921/a-hybrid-solid-state-nmr-and-electron-microscopy-structure-determination-protocol-for-engineering-advanced-para-crystalline-optical-materials
#6
Brijith Thomas, Jeroen Rombouts, Gert T Oostergetel, Karthick Babu Sai Sankar Gupta, Francesco Buda, Koop Lammertsma, Romano Orru, Huub J M de Groot
We demonstrate hybrid MAS NMR and TEM for de novo structure determination of para-crystalline materials with a bioinspired fused naphthalene diimide (NDI) - salphen - phenazine prototype light harvesting compound.  Starting from chiral building blocks with C2 molecular symmetry we determine the asymmetric unit by MAS NMR, index low resolution TEM diffraction data, resolve reflection conditions, and show for the first time ability to determine the space group from reciprocal space data using our hybrid approach...
January 24, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28113845/numerical-simulation-of-transit-time-ultrasonic-flowmeters-by-a-direct-approach
#7
Adrian Luca, Regis Marchiano, Jean-Camille Chassaing
This paper deals with the development of a computational code for the numerical simulation of wave propagation through domains with a complex geometry consisting in both solids and moving fluids. The emphasis is on the numerical simulation of ultrasonic flowmeters (UFMs) by modeling the wave propagation in solids with the equations of linear elasticity and in fluids with the linearized Euler equations. This approach requires high performance computing because of the high number of degrees of freedom and the long propagation distances...
March 23, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28094013/pulmonary-outcome-of-esophageal-atresia-patients-and-its-potential-causes-in-early-childhood
#8
René Dittrich, Philippe Stock, Karin Rothe, Petra Degenhardt
INTRODUCTION: The aim of this study was to illustrate the pulmonary long term outcome of patients with repaired esophageal atresia and to further examine causes and correlations that might have led to this outcome. METHODS: Twenty-seven of 62 possible patients (43%) aged 5-20years, with repaired esophageal atresia were recruited. Body plethysmography and spirometry were performed to evaluate lung function, and the Bruce protocol treadmill exercise test to assess physical fitness...
January 3, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28046601/su-f-t-232-monthly-quality-assurance-in-external-beam-radiation-therapy-using-a-single-system
#9
K Ding, T Ji, I Iordachita, E Velarde, J Hyatt, J Wong
PURPOSE: Monthly quality assurance (QA) is time consuming for external beam radiation therapy, taking as long as 6-8 hours for each machine. It is due to the use and setup of multiple devices for different QA procedures. We have developed a single system with rotational capability for the measurement of both optical light and radiation which significantly reduces the time spent on Monthly QA. METHODS: A single system using mirrors, a phosphor screen and a CCD camera is housed on a cylindrical motor so that it can rotate 360 degrees...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28025558/empirical-analysis-and-modeling-of-stop-line-crossing-time-and-speed-at-signalized-intersections
#10
Keshuang Tang, Fen Wang, Jiarong Yao, Jian Sun
In China, a flashing green (FG) indication of 3 s followed by a yellow (Y) indication of 3 s is commonly applied to end the green phase at signalized intersections. Stop-line crossing behavior of drivers during such a phase transition period significantly influences safety performance of signalized intersections. The objective of this study is thus to empirically analyze and model drivers' stop-line crossing time and speed in response to the specific phase transition period of FG and Y. High-resolution trajectories for 1465 vehicles were collected at three rural high-speed intersections with a speed limit of 80 km/h and two urban intersections with a speed limit of 50 km/h in Shanghai...
December 23, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28007336/the-combined-frequency-of-igf-and-myostatin-polymorphism-among-track-field-athletes-and-swimmers
#11
Sigal Ben-Zaken, Yoav Meckel, Dan Nemet, Alon Eliakim
OBJECTIVE: The IGF C-1245T (rs35767) and the myostatin (MSTN) Lys(K)-153Arg(R) genetic polymorphism may influence skeletal muscle phenotypes and athletic performance. Carrying the minor IGF T allele and the myostatin rare R allele was associated with higher circulating IGF-I levels, greater muscle mass and improved performance. The aim of the present study was to assess the combined frequency of the IGF 1245T (rs35767) and MSTN 153Arg(R) polymorphism among Israeli track and field athletes (n=111) and swimmers (n=80)...
December 15, 2016: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/27918655/activity-profiles-and-positional-differences-of-handball-players-during-the-world-championships-in-qatar-2015
#12
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/27917706/the-changes-of-positive-selection-within-env-gene-of-hiv-1-b-crf07_bc-and-crf08_bc-from-china-over-time
#13
Tingting Li, Binlian Sun, Yanyan Jiang, Haiyan Zeng, Yanpeng Li, Yan Wang, Rongge Yang
: It is not clear about the possible evolutionary changes of the three predominant strains of HIV-1 in China over the course of the epidemic. Envelope (env) gene of HIV-1 is a good target for this evolutionary pressure for its enriched epitopes. METHODS: We collected 159 full or part of env sequences sampled between 1997 and 2010 from database of China, we calculated the genetic distance, detected the positively selected sites by PAML suite and then compared the number using Fisher's exact test between the early period 1997 to 2003and the late period2004 to 2010...
December 5, 2016: Current HIV Research
https://www.readbyqxmd.com/read/27909228/divergent-outcomes-of-fructose-consumption-on-exercise-capacity-of-rats-friend-or-foe
#14
Angela Sun, An Huang, Elizabeth Kertowidjojo, Su Song, Thomas H Hintze, Dong Sun
To test the hypothesis that high fructose (HF) consumption divergently affects exercise capability, as a function of feeding duration, rats were fed a normal (as control) or a normal caloric diet with HF for 3, 6, 10 and 30 days respectively, and run on a treadmill. Results show that running distance and work were significantly increased, associated with greater exercise oxygen consumption in rats fed HF for 3 (HF-3D) and 6 days, but were decreased in rats fed HF for 30 days (HF-30D) compared to their respective control rats...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27905293/long-term-exercise-in-mice-has-sex-dependent-benefits-on-body-composition-and-metabolism-during-aging
#15
Rachel C McMullan, Scott A Kelly, Kunjie Hua, Brian K Buckley, James E Faber, Fernando Pardo-Manuel de Villena, Daniel Pomp
Aging is associated with declining exercise and unhealthy changes in body composition. Exercise ameliorates certain adverse age-related physiological changes and protects against many chronic diseases. Despite these benefits, willingness to exercise and physiological responses to exercise vary widely, and long-term exercise and its benefits are difficult and costly to measure in humans. Furthermore, physiological effects of aging in humans are confounded with changes in lifestyle and environment. We used C57BL/6J mice to examine long-term patterns of exercise during aging and its physiological effects in a well-controlled environment...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27863044/exercise-for-healthy-flow
#16
EDITORIAL
P Hillmeister, E Buschmann, P B Persson, A Bondke Persson
No abstract text is available yet for this article.
January 2017: Acta Physiologica
https://www.readbyqxmd.com/read/27855981/the-thigh-and-leg-of-homo-naledi
#17
Damiano Marchi, Christopher S Walker, Pianpian Wei, Trenton W Holliday, Steven E Churchill, Lee R Berger, Jeremy M DeSilva
This paper describes the 108 femoral, patellar, tibial, and fibular elements of a new species of Homo (Homo naledi) discovered in the Dinaledi chamber of the Rising Star cave system in South Africa. Homo naledi possesses a mosaic of primitive, derived, and unique traits functionally indicative of a bipedal hominin adapted for long distance walking and possibly running. Traits shared with australopiths include an anteroposteriorly compressed femoral neck, a mediolaterally compressed tibia, and a relatively circular fibular neck...
November 15, 2016: Journal of Human Evolution
https://www.readbyqxmd.com/read/27822290/dietary-selenium-augments-sarcoplasmic-calcium-release-and-mechanical-performance-in-mice
#18
Dóra Bodnár, Olga Ruzsnavszky, Tamás Oláh, Beatrix Dienes, Ildikó Balatoni, Éva Ungvári, Ilona Benkő, Beáta Babka, József Prokisch, László Csernoch, Péter Szentesi
BACKGROUND: As an essential trace element selenium plays a significant role in many physiological functions of the organs. It is found within muscles as selenocystein in selenoprotein N, which is involved in redox-modulated calcium homeostasis and in protection against oxidative stress. METHODS: The effects of two different selenium compounds (selenate and NanoSe in 0.5 and 5 ppm concentration for two weeks) on muscle properties of mice were examined by measuring in vivo muscle performance, in vitro force in soleus (SOL) and extensor digitorum longus (EDL) muscles and changes in intracellular Ca(2+) concentration in single fibers from flexor digitorum brevis (FDB) muscle...
2016: Nutrition & Metabolism
https://www.readbyqxmd.com/read/27815238/strategies-and-factors-associated-with-preparing-for-competing-in-the-heat-a-cohort-study-at-the-2015-iaaf-world-athletics-championships
#19
Julien D Périard, Sébastien Racinais, Toomas Timpka, Örjan Dahlström, Armin Spreco, Jenny Jacobsson, Victor Bargoria, Karin Halje, Juan-Manuel Alonso
PURPOSE: Assess exertional heat illness (EHI) history and preparedness in athletes competing in a World Athletics Championships under hot/humid conditions and identify the factors associated with preparedness strategies. METHODS: Of the 207 registered national teams invited to participate in the study, 50 (24%) accepted. The 957 athletes (49% of all 1965 registered) in these teams were invited to complete a precompetition questionnaire evaluating EHI history, heat stress prevention (heat acclimatisation, precooling and hydration) and recovery...
November 4, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27812406/pacing-during-an-ultramarathon-running-event-in-hilly-terrain
#20
Hugo A Kerhervé, Tom Cole-Hunter, Aaron N Wiegand, Colin Solomon
PURPOSE: The dynamics of speed selection as a function of distance, or pacing, are used in recreational, competitive, and scientific research situations as an indirect measure of the psycho-physiological status of an individual. The purpose of this study was to determine pacing on level, uphill and downhill sections of participants in a long (>80 km) ultramarathon performed on trails in hilly terrain. METHODS: Fifteen ultramarathon runners competed in a  173 km event (five finished at  103 km) carrying a Global-Positioning System (GPS) device...
2016: PeerJ
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