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https://www.readbyqxmd.com/read/28282753/reliability-of-the-virtual-elevation-method-to-evaluate-rolling-resistance-of-different-mountain-bike-cross-country-tyres
#1
Thomas Maier, Beat Müller, Lucas Schmid, Thomas Steiner, Jon Peter Wehrlin
Although a low rolling resistance is advantageous in mountain bike cross-country racing, no studies have used the virtual elevation method to compare tyres from different manufacturers as used in international competitions so far. The aims of this study were to assess the reliability of this method, to compare the off-road rolling resistance between tyres and to calculate the influence on off-road speed. Nine 29-in. mountain bike cross-country tyres were tested on a course representing typical ground surface conditions 5 or 6 times...
February 9, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28253040/demands-of-world-cup-competitions-in-elite-women-road-cycling
#2
Paolo Menaspà, Marco Sias, Gene Bates, Antonio La Torre
PURPOSE: Describing the demand of recent World Cup (WC) races comparing Top 10 (T10) and non-Top 10 (N-T10) performances using power data. METHODS: Race data were collected in 1-day World Cup races during the 2012-2015 road cycling seasons. Seven female cyclists completed 49 WC races, finishing 25 times in T10 and 24 times N-T10. Peak power (1 s) and Maximal Mean Power (MMP) for durations of 5, 10, 20 and 30 s and 1, 2, 5, 10, 20, 30 and 60 min expressed as power to weight ratio were analysed in T10 and N-T10...
March 2, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28246070/accuracy-and-adoption-of-wearable-technology-used-by-active-citizens-a-marathon-event-field-study
#3
Monika Pobiruchin, Julian Suleder, Richard Zowalla, Martin Wiesner
BACKGROUND: Today, runners use wearable technology such as global positioning system (GPS)-enabled sport watches to track and optimize their training activities, for example, when participating in a road race event. For this purpose, an increasing amount of low-priced, consumer-oriented wearable devices are available. However, the variety of such devices is overwhelming. It is unclear which devices are used by active, healthy citizens and whether they can provide accurate tracking results in a diverse study population...
February 28, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28144412/secular-trend-in-thinness-prevalence-for-26-years-1989-2014-among-high-school-runners-in-japan
#4
Norimitsu Kinoshita, Rei Fukuda
BACKGROUND: Female distance runners are predisposed to thinness for performance reasons and at greater risk for health-related consequences than the general population. OBJECTIVES: The aim of the study was to evaluate the secular trends in thinness among competitive distance runners in Japanese high schools with sex-specific comparison. METHODS: Body mass index (BMI) were analysed in 9,881 female and 12,786 male runners participating in the annual national road relay races between 1989 and 2014 using the directory of a track and field magazine...
December 2016: Asian Journal of Sports Medicine
https://www.readbyqxmd.com/read/28125059/racial-differences-in-perceptions-of-air-pollution-health-risk-does-environmental-exposure-matter
#5
Jayajit Chakraborty, Timothy W Collins, Sara E Grineski, Alejandra Maldonado
This article extends environmental risk perception research by exploring how potential health risk from exposure to industrial and vehicular air pollutants, as well as other contextual and socio-demographic factors, influence racial/ethnic differences in air pollution health risk perception. Our study site is the Greater Houston metropolitan area, Texas, USA-a racially/ethnically diverse area facing high levels of exposure to pollutants from both industrial and transportation sources. We integrate primary household-level survey data with estimates of excess cancer risk from ambient exposure to industrial and on-road mobile source emissions of air toxics obtained from the U...
January 25, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28005921/association-of-functional-impairments-and-co-morbid-conditions-with-driving-performance-among-cognitively-normal-older-adults
#6
David B Carr, Peggy P Barco, Ganesh M Babulal, Sarah H Stout, Anne M Johnson, Chengjie Xiong, John C Morris, Catherine M Roe
OBJECTIVES: To examine the relationship between key functional impairments, co-morbid conditions and driving performance in a sample of cognitively normal older adults. DESIGN: Prospective observational study. SETTING: The Knight Alzheimer's Disease Research Center, Washington University at St. Louis. PARTICIPANTS: Individuals with normal cognition, 64.9 to 88.2 years old (N = 129), with a valid driver's license, who were currently driving at least once per week, and who had participated in longitudinal studies at the Knight Alzheimer's Disease Research Center...
2016: PloS One
https://www.readbyqxmd.com/read/27993115/virus-oncolytic-virus-and-human-prostate-cancer
#7
Guang Bin Liu, Liang Zhao, Lifang Zhang, Kong-Nan Zhao
Prostate cancer (PCa), a disease, is characterized by abnormal cell growth in the prostate - a gland in the male reproductive system. PCa is one of the leading causes of cancer death among men of all races. Although older age and a family history of the disease have been recognized as the risk factors of PCa, the cause of this cancer remains unclear. Mounting evidence suggests that infections with various viruses are causally linked to PCa pathogenesis. Published studies have provided strong evidence that at least two viruses (RXMV and HPV) contribute to prostate tumourigenicity and impact on the survival of patients with malignant PCa...
December 15, 2016: Current Cancer Drug Targets
https://www.readbyqxmd.com/read/27925114/the-occurrence-of-external-causes-in-childhood-in-emergency-care-epidemiological-aspects-brazil-2014
#8
Deborah Carvalho Malta, Márcio Dênis Medeiros Mascarenhas, Marta Maria Alves da Silva, Mércia Gomes Oliveira de Carvalho, Laura Augusta Barufaldi, Jovina Quintes Avanci, Regina Tomie Ivata Bernal
Objective: To describe emergency care for external causes in childhood, age group 0-9 years, in Brazilian capitals, collected from the Violence and Accident Surveillance System (VIVA) Survey in 2014. Methods: To review data from the VIVA survey conducted in public emergency services in 24 Brazilian capitals. Variables analyzed were gender, age group (0-1 years, 2-5 years and 6-9 years), race/skin color, type of events and injuries, aggressors and other. Results: Eight thousand five hundred eighty-eight children received care, of which 8,164 (95%) were victims of accidents and 424 (5%) of violence...
December 2016: Ciência & Saúde Coletiva
https://www.readbyqxmd.com/read/27918669/the-within-season-distribution-of-external-training-and-racing-workload-in-professional-male-road-cyclist
#9
Alan J Metcalfe, Paolo Menaspà, Vincent Villerius, Marc Quod, Jeremiah J Peiffer, Andrew D Govus, Chris R Abbiss
PURPOSE: To describe the within-season external workloads of professional male road cyclists for optimal training prescription. METHODS: Training and racing of four international competitive professional male cyclists (age 24 ± 2 y, body mass 77.6 ± 1.5 kg) were monitored for 12 months prior to the world team time trial championships. Three within-season phases leading up to the team time trial world championships on 20(th) Sept 2015 were defined as phase one (Oct - Jan), phase two (Feb - May) and phase three (June - Sept)...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27874992/editorial-on-the-road-to-health-equity-incorporating-culture-into-research
#10
EDITORIAL
Rosa M Gonzalez-Guarda, June Carrington
No abstract text is available yet for this article.
November 22, 2016: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/27760278/hazard-characteristics-and-patterns-of-environmental-injustice-household-level-determinants-of-environmental-risk-in-miami-florida
#11
Sara E Grineski, Timothy W Collins, Jayajit Chakraborty, Marilyn Montgomery
Limited systematic comparative knowledge exists about patterns of environmental injustices in exposure to varied natural and technological hazards. To address this gap, we examine how hazard characteristics (i.e., punctuated event/suddenness of onset, frequency/magnitude, and divisibility) influence relationships between race/ethnicity, nativity, socioeconomic status (SES), older age, housing tenure, and residential hazard exposure. Sociodemographic data come from a random sample survey of 602 residents of the tricounty Miami Metropolitan Statistical Area (Florida)...
October 19, 2016: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/27720128/deviation-from-goal-pace-body-temperature-and-body-mass-loss-as-predictors-of-road-race-performance
#12
William M Adams, Yuri Hosokawa, Luke N Belval, Robert A Huggins, Rebecca L Stearns, Douglas J Casa
OBJECTIVES: The purpose of this study was to examine the relationship between pacing, gastrointestinal temperature (TGI), and percent body mass loss (%BML) on relative race performance during a warm weather 11.3km road race. DESIGN: Observational study of a sample of active runners competing in the 2014 Falmouth Road Race. METHODS: Participants ingested a TGI pill and donned a GPS enabled watch with heart rate monitoring capabilities prior to the start of the race...
March 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27716495/examining-racial-bias-as-a-potential-factor-in-pedestrian-crashes
#13
Courtney Coughenour, Sheila Clark, Ashok Singh, Eudora Claw, James Abelar, Joshua Huebner
INTRODUCTION: In the US people of color are disproportionately affected by pedestrian crashes. The purpose of this study was to examine the potential for racial bias in driver yielding behaviors at midblock crosswalks in low and high income neighborhoods located in the sprawling metropolitan area of Las Vegas, NV. METHODS: Participants (1 white, 1 black female) crossed at a midblock crosswalk on a multilane road in a low income and a high income neighborhood. Trained observers recorded (1) number of cars that passed in the nearest lane before yielding while the pedestrian waited near the crosswalk at the curb (2) number of cars that passed through the crosswalk with the pedestrian in the same half of the roadway...
January 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/27712198/performance-and-physiological-effects-of-different-descending-strategies-for-cross-country-mountain-biking
#14
Matthew C Miller, Paul W Macdermid, Phil W Fink, Stephen R Stannard
This study investigated the performance-related feasibility and physiological benefits of purposefully eliminating propulsive work while descending in mountain biking and compared values to those measured during road descending. Participants cycled uphill on a road at race pace before descending over three conditions (off-road pedalling; off-road coasting; road coasting). Relatively low power output during off-road pedalling was associated with a greater oxygen uptake (p < .01) when compared with off-road coasting despite no difference in vibration exposure (p > ...
April 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/27706375/mortality-and-potential-years-of-life-lost-by-road-traffic-injuries-in-brazil-2013
#15
Silvânia Suely Caribé de Araújo Andrade, Maria Helena Prado de Mello-Jorge
OBJECTIVE: To estimate the potential years of life lost by road traffic injuries three years after the beginning of the Decade of Action for Traffic Safety. METHODS: We analyzed the data of the Sistema de Informações sobre Mortalidade (SIM - Mortality Information System) related to road traffic injuries, in 2013. We estimated the crude and standardized mortality rates for Brazil and geographic regions. We calculated, for the Country, the proportional mortality according to age groups, education level, race/skin color, and type or quality of the victim while user of the public highway...
October 3, 2016: Revista de Saúde Pública
https://www.readbyqxmd.com/read/27660400/how-do-individual-level-sociodemographics-and-neighbourhood-level-characteristics-influence-residential-location-behaviour-in-the-context-of-the-food-and-built-environment-findings-from-25%C3%A2-years-of-follow-up-in-the-cardia-study
#16
Pasquale E Rummo, David K Guilkey, James M Shikany, Jared P Reis, Penny Gordon-Larsen
BACKGROUND: Little is known about how diet-related and activity-related amenities relate to residential location behaviour. Understanding these relationships is essential for addressing residential self-selection bias. METHODS: Using 25 years (6 examinations) of data from the Coronary Artery Risk Development in Young Adults (CARDIA) study (n=11 013 observations) and linked neighbourhood-level data from the 4 CARDIA baseline cities (Birmingham, Alabama; Chicago, Illinois; Minneapolis, Minnesota; Oakland, California, USA), we characterised participants' neighbourhoods as having low, average or high road connectivity and amenities using non-hierarchical cluster analysis...
March 2017: Journal of Epidemiology and Community Health
https://www.readbyqxmd.com/read/27547544/fast-men-slow-more-than-fast-women-in-a-10-kilometer-road-race
#17
Robert O Deaner, Vittorio Addona, Rickey E Carter, Michael J Joyner, Sandra K Hunter
Background. Previous studies have demonstrated that men are more likely than women to slow in the marathon (footrace). This study investigated whether the sex difference in pacing occurs for a shorter race distance. Materials & Methods. Data were acquired from the Bolder Boulder 10 km road race for the years 2008-2013, which encompassed 191,693 performances. There were two pacing measures, percentage change in pace of the first 3 miles relative to the final 3.2 miles and percentage change in pace of the first mile relative to the final 5...
2016: PeerJ
https://www.readbyqxmd.com/read/27500236/renal-function-in-kidney-and-liver-transplant-recipients-after-a-130-km-road-cycling-race
#18
Giovanni Mosconi, Giulio Sergio Roi, Valentina Totti, Marco Zancanaro, Alessandra Tacconi, Paola Todeschini, Eric Ramazzotti, Rocco Di Michele, Manuela Trerotola, Carlo Donati, Alessandro Nanni Costa
BACKGROUND: A few patients, after receiving solid organ transplantation, return to performing various sports and competitions; however, at present, data no study had evaluated the effects of endurance cycling races on their renal function. METHODS: Race times and short form (36) health survey questionnaires of 10 kidney transplant recipients (KTR) and 8 liver transplant recipients (LTR) transplanted recipients involved in a road cycling race (130 km) were compared with 35 healthy control subjects (HCS), also taking laboratory blood and urine tests the day before the race, at the end of the race, and 18 to 24 hours after competing...
October 2015: Transplantation Direct
https://www.readbyqxmd.com/read/27448603/bicycling-crashes-on-streetcar-tram-or-train-tracks-mixed-methods-to-identify-prevention-measures
#19
Kay Teschke, Jessica Dennis, Conor C O Reynolds, Meghan Winters, M Anne Harris
BACKGROUND: Streetcar or train tracks in urban areas are difficult for bicyclists to negotiate and are a cause of crashes and injuries. This study used mixed methods to identify measures to prevent such crashes, by examining track-related crashes that resulted in injuries to cyclists, and obtaining information from the local transit agency and bike shops. METHODS: We compared personal, trip, and route infrastructure characteristics of 87 crashes directly involving streetcar or train tracks to 189 crashes in other circumstances in Toronto, Canada...
2016: BMC Public Health
https://www.readbyqxmd.com/read/27377913/residential-proximity-to-traffic-and-female-pubertal-development
#20
Laura A McGuinn, Robert W Voss, Cecile A Laurent, Louise C Greenspan, Lawrence H Kushi, Gayle C Windham
BACKGROUND: Traffic-related air pollution (TRAP) has been linked with several adverse health outcomes, including preterm birth and low birth weight, which are both related to onset of puberty. No studies to date have investigated the association between TRAP and altered pubertal timing. OBJECTIVE: Determine the association between residential proximity to traffic, as a marker of long-term TRAP exposure, and age at pubertal onset in a longitudinal study of girls...
September 2016: Environment International
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