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https://www.readbyqxmd.com/read/28717626/muscle-fatigue-in-participants-of-indoor-cycling
#1
Ricardo de Melo Dos Santos, Flavio Costa E Costa, Thais Sepeda Saraiva, Bianca Callegari
BACKGROUND: Indoor Cycling (IC) has been gaining recognition and popularity within recent years and few studies have investigated its benefits for sedentary participants. OBJECTIVE: The aim of this study was to evaluate differences in the surface electromyography (sEMG) variables, heart rate (HR), and subjective effort in sedentary participants while they performed an IC session and to compare their results with the trained subjects, to answer the question: Are trained cyclists less susceptible to muscle fatigue, since it is expected that they make less effort? DESIGN: Twenty-six volunteers were split into two groups according to their fitness status and weekly training load...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28716775/acute-rehabilitation-after-resuscitative-endovascular-balloon-occlusion-of-the-aorta-reboa-in-major-trauma
#2
Jessica Anne Rich, Julia Coleman, Camille Devaux, Karen Hoffman
We report a 23-year-old woman admitted post cyclist versus heavy goods vehicle accident in December 2014. This was the second case the life-saving procedure, that is, resuscitative endovascular balloon occlusion of the aorta (REBOA) was performed on at the roadside. This advanced procedure was performed due to the extensive haemorrhage from this patient's complex pelvic fracture . As a result of REBOA, the patient consequently lost her left lower limb and underwent a variety of complex pelvic and lower limb surgeries...
July 17, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28710974/predictors-of-recovery-in-cyclists-hospitalised-for-orthopaedic-trauma-following-an-on-road-crash
#3
Ben Beck, Christina L Ekegren, Peter Cameron, Elton R Edwards, Andrew Bucknill, Rodney Judson, Richard Page, Raphael Hau, Mark Stevenson, Belinda J Gabbe
BACKGROUND: As cycling-related injury rates are on the rise, there is a need to understand the long term outcomes of these patients in order to quantify the burden of injury and to inform injury prevention strategies. This study aimed to investigate predictors of return to work and functional recovery in a cohort of cyclists hospitalised for orthopaedic trauma from crashes occurring on-road. METHODS: A retrospective analysis of data from the Victorian Orthopaedic Trauma Outcomes Registry (VOTOR) was conducted for patients who were hospitalised for orthopaedic trauma following a cycling crash that occurred on-road between July 2007 and June 2015...
July 12, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28706832/iliotibial-band-lengthening-an-arthroscopic-surgical-technique
#4
Todd P Pierce, Samuel J Mease, Kimona Issa, Anthony Festa, Vincent K McInerney, Anthony J Scillia
Iliotibial (IT) band syndrome is a common cause of lateral knee pain in runners and cyclists. Many can be treated nonoperatively; however, some may require surgical lengthening of their IT band to achieve optimal pain relief and a return to preinjury level of activity. Several studies have been published detailing surgical lengthening procedures and satisfactory outcomes after these procedures. However, it is important to continue to improve on and optimize outcomes. We present our arthroscopic IT band-lengthening procedure...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28704881/cardiovascular-and-autonomic-responses-to-a-maximal-exercise-test-in-elite-youngsters
#5
Cristina Blasco-Lafarga, Borja Camarena, Manuel Mateo-March
To analyze cardiovascular and autonomic responses in elite youngsters, 13 male cyclists (15.43±0.51 years) performed a graded-test until voluntary exhaustion. Oxygen consumption (VO2), blood lactate (BLa), arterial oxygen saturation (SaO2), respiratory exchange ratio (RER) and rating of perceived exertion (RPE) were collected, while heart rate (HR) was registered for heart rate variability (HRV) analyses, looking for linear and nonlinear comparisons. Cyclists reached maximal exertion [RPE: 19.14±0.94; BLa: 8...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704307/acute-cardiopulmonary-metabolic-and-neuromuscular-responses-to-severe-intensity-intermittent-exercises
#6
Felipe D Lisbôa, João A G Raimundo, Amadeo F Salvador, Kayo L Pereira, Tiago Turnes, Fernando Diefenthaeler, Mariana F M de Oliveira, Fabrizio Caputo
The purpose of this study was to compare cardiopulmonary, neuromuscular, and metabolic responses to severe-intensity intermittent exercises with variable or constant work rate. Eleven cyclists (28 ± 5 years; 74 ± 7 kg; 175 ± 5 cm; 63 ± 4 mL·kg·min) performed the following tests until exhaustion on separate days: 1) an incremental test; 2) in random order, two constant work rate tests at 95% and 110% of the peak power for the determination of Critical Power (CP); 3) 2-4 tests for the determination of the highest power that still permits the achievement of maximal oxygen uptake (PHIGH); and 4) two random severe-intensity intermittent exercises...
July 12, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28700517/a-longitudinal-assessment-of-bone-mineral-density-and-body-composition-in-competitive-cyclists
#7
Breanne S Baker, Raoul F Reiser
Competitive cycling has been associated with low bone mineral density (BMD); however, BMD is a multifaceted issue. The purpose of this study was to investigate how age (18-49 years), sex, USA Cycling Category (elite-4) and racing type (road and multiple bikes), influenced body composition across a season in competitive cyclists. February marked the preseason, where 42 participants (22 males, 20 females) completed a health history and cycling questionnaire, four day dietary log and a Dual-energy X-ray absorptiometry (DXA) scan and repeated the measures 180±11 days later...
July 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28696993/special-communication-of-a-case-of-hypovolemic-associated-eah-lessons-learned-during-recovery
#8
Tamara Hew-Butler, Rus Hamilton, Bridget Hamilton, Zachary Colesa
Severe exercise-associated hyponatremia (EAH) is largely dilutional, whereas contributions of sodium loss remain equivocal. We present a case of EAH with encephalopathy involving an experienced male cyclist with no recollection of the event. We thereby conducted a retrospective analysis of biochemical trajectories during hospital recovery. The normalization of serum [Na], in context with changes in other variables, offered a 'reverse' perspective of the underlying pathophysiology. The following biochemical changes were temporally observed, with the return of normonatremia: 1) a decrease in serum potassium and calcium concentrations (absence of extracellular fluid dilution); 2) a decrease in total protein, blood urea nitrogen, hematocrit and hemoglobin (plasma volume expansion); and 3) an increase in mean platelet and red cell corpuscular volumes (cellular expansion after total body water and sodium deficits)...
July 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/28693547/longitudinal-associations-between-built-environment-characteristics-and-changes-in-active-commuting
#9
Lin Yang, Simon Griffin, Kay-Tee Khaw, Nick Wareham, Jenna Panter
BACKGROUND: Few studies have assessed the predictors of changes in commuting. This study investigated the associations between physical environmental characteristics and changes in active commuting. METHODS: Adults from the population-based European Prospective Investigation into Cancer (EPIC)-Norfolk cohort self-reported commuting patterns in 2000 and 2007. Active commuters were defined as those who reported 'always' or 'usually' walking or cycling to work. Environmental attributes around the home and route were assessed using Geographical Information Systems...
May 17, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28690546/repeated-excessive-exercise-attenuates-the-anti-inflammatory-effects-of-exercise-in-older-men
#10
Ronni E Sahl, Peter R Andersen, Katja Gronbaek, Thomas H Morville, Mads Rosenkilde, Hanne K Rasmusen, Steen S Poulsen, Clara Prats, Flemming Dela, Jørn W Helge
Introduction/Purpose: A number of studies have investigated the effect of training with a moderate exercise dose (3-6 h/weekly) on the inflammatory profile in blood, and the data are inconsistent. Cross-sectional studies indicate a positive effect of physical activity level on inflammation levels and risk of metabolic disease. However, it is not clear whether this may be dose dependent and if very prolonged repeated exercise therefore may be beneficial for low-grade inflammation. Based on this we studied how excessive repeated prolonged exercise influenced low-grade inflammation and adipose tissue anti-inflammatory macrophage content in six older male recreationally trained cyclists...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28686002/cerebrocortical-activity-during-self-paced-exercise-in-temperate-hot-and-hypoxic-conditions
#11
Julien D Périard, Kevin De Pauw, Frank Zanow, Sébastien Racinais
AIM: Heat stress and hypoxia independently influence cerebrocortical activity and impair prolonged exercise performance. This study examined the relationship between electroencephalography (EEG) activity and self-paced exercise performance in control (CON, 18°C, 40% RH), hot (HOT, 35°C, 60%RH) and hypoxic (HYP, 18°C, 40%RH FiO2 : 0.145) conditions. METHODS: Eleven well-trained cyclists completed a 750 kJ cycling time trial in each condition on separate days in a counter-balanced order...
July 7, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28685886/longitudinal-adaptations-of-bone-mass-geometry-and-metabolism-in-adolescent-male-athletes-the-pro-bone-study
#12
Dimitris Vlachopoulos, Alan R Barker, Esther Ubago-Guisado, Ioannis G Fatouros, Karen M Knapp, Craig A Williams, Luis Gracia-Marco
Adolescence is a crucial period for bone development and exercise can enhance bone acquisition during this period of life. However, it is not known how the different loading sports practised can affect bone acquisition in adolescent male athletes. Therefore, the purpose of the present study was to determine the 1 year longitudinal bone acquisition among adolescent males involved in osteogenic (football) and non-osteogenic sports (swimming and cycling) and compared to active controls. 116 adolescent males aged 12-14 years at baseline were monitored 1 year: 37 swimmers, 37 footballers, 29 cyclists and 14 active controls...
July 7, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28679010/factors-influencing-injury-severity-of-bicyclists-involved-in-crashes-with-motor-vehicles-bike-lanes-alcohol-lighting-speed-and-helmet-use
#13
Kelsey Helak, Dietrich Jehle, Daniel McNabb, Amanda Battisti, Steward Sanford, Mary Claire Lark
OBJECTIVES: In 2014, 726 bicyclists were killed and an additional 50,000 were injured in crashes with motor vehicles. The number of cyclists in the United States is increasing, and as a result there has been a call for more bike lanes. We examined the difference in the severity of injury of bicyclists involved in motor vehicle crashes when riding in the traffic lane compared with riding in a bike lane or on a paved shoulder. We also controlled for other safety factors, including alcohol use, travel speed, posted speed, helmet usage, and lighting conditions to determine their impact on bicyclist safety...
July 2017: Southern Medical Journal
https://www.readbyqxmd.com/read/28677943/achieving-grand-tour-success-a-pilot-study-using-cycling-s-world-tour-points
#14
Luca Filipas, Antonio LA Torre, Paolo Menaspà, Hedda Giorgi
BACKGROUND: In cycling, the Union Cycliste International (UCI) World Tour points system provides a basis to assess the development of riders by longitudinally monitoring accumulated points. The main aim of the present analysis was to compare the annual aggregation of points of Grand Tours (GT) contenders during the years before and the year after achieving an overall top-ten (T10) placing in a GT for the first time. METHODS: Data from professional cyclists who achieved their first T10 GC result in a GT between 2010 and 2015, inclusive, were included in the analysis...
July 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28675092/introducing-experiment-in-pedestrian-behaviour-and-risk-perception-study-at-urban-level-crossing
#15
Danijela Barić, Hrvoje Pilko, Martin Starčević
Given the high risk of severe accidents at level crossings (LCs), this study examined legal and illegal crossings by pedestrians and cyclists at a high-traffic LC in Zagreb, Croatia. Survey data and field observations were collected to identify reasons for risky behaviour. Behaviour was observed under normal conditions and in the presence of various safety measures in order to identify measures that can reduce risky behaviour. Results show that the presence of police officer at the LC was most effective at reducing illegal crossings, while the presence of cameras contributes significantly as well, especially after safety educational campaign when illegal crossing decreases for 59...
July 4, 2017: International Journal of Injury Control and Safety Promotion
https://www.readbyqxmd.com/read/28675090/unsafe-cycling-behaviours-and-near-crashes-among-italian-cyclists
#16
Víctor Marín Puchades, Luca Pietrantoni, Federico Fraboni, Marco De Angelis, Gabriele Prati
This study investigates the direct and indirect effect of three types of unsafe behaviours (i.e. errors, generic violations and smartphone-specific violations) on the likelihood of near crashes and actual crashes among Italian cyclists. We considered smartphone-specific violations as a different unsafe behaviour subtype that enhances the probability of committing errors, thus increasing the likelihood of being involved in near crashes. Furthermore, we hypothesized that near crashes will predict actual crashes...
July 4, 2017: International Journal of Injury Control and Safety Promotion
https://www.readbyqxmd.com/read/28674606/comparison-of-ventilatory-measures-and-20-km-time-trial-performance
#17
Willard W Peveler, Brandy Shew, Samantha Johnson, Gabe Sanders, Roger Kollock
Performance threshold measures are used to predict cycling performance. Previous research has focused on long time trials (≥ 40 km) using power at ventilatory threshold and respiratory threshold to estimate time trial performance. As intensity greatly differs during shorter time trails applying findings from longer time trials may not be appropriate. The use of heart rate measures to determine 20 km time trial performance has yet to be examined. The purpose of this study was to determine the effectiveness of heart rate measures at ventilatory threshold (VE/VO2 Plotted and VT determined by software) and respiratory threshold (RER of 0...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28672065/lean-mass-explains-the-association-between-muscular-fitness-and-bone-outcomes-in-13-year-old-boys
#18
Esther Ubago-Guisado, Dimitris Vlachopoulos, Augusto César Ferreira de Moraes, Ana Torres-Costoso, Kelly Wilkinson, Brad Metcalf, Javier Sánchez-Sánchez, Leonor Gallardo, Luis Gracia-Marco
AIM: This study investigated the associations between fitness indices and bone outcomes in young males. METHODS: Data were collected between autumn and winter 2014-2015 on 121 males with a mean age of 13.1 ±0.1 years: 41 swimmers, 37 footballers, 29 cyclists and 14 non-athletes. Participants were recruited from athletic clubs and schools across South West England. Lean mass, areal bone mineral density and hip structural estimates were measured using dual-energy X-ray absorptiometry...
July 3, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28671853/physiological-and-anthropometric-characteristics-of-top-level-youth-cross-country-cyclists
#19
Alessandro Fornasiero, Aldo Savoldelli, Roberto Modena, Gennaro Boccia, Barbara Pellegrini, Federico Schena
In the literature there is a lack of data about the development of top level athletes in cross-country mountain biking (XCO). The purpose of this study was to analyze anthropometric and physiological characteristics of some of the best XCO bikers aged between 13 and 16. The study involved 45 bikers (26 males and 19 females) belonging to a youth national team. The evaluations, consisting of anthropometric measures, incremental cycling tests (VO2max, PPO, P@RCP), and 30 s Wingate Tests (PMax, PMean), were conducted over a lapse of 4 years...
July 3, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28669689/effects-of-erythropoietin-on-cycling-performance-of-well-trained-cyclists-a-double-blind-randomised-placebo-controlled-trial
#20
Jules A A C Heuberger, Joris I Rotmans, Pim Gal, Frederik E Stuurman, Juliëtte van 't Westende, Titiaan E Post, Johannes M A Daniels, Matthijs Moerland, Peter L J van Veldhoven, Marieke L de Kam, Herman Ram, Olivier de Hon, Jelle J Posthuma, Jacobus Burggraaf, Adam F Cohen
BACKGROUND: Substances that potentially enhance performance (eg, recombinant human erythropoietin [rHuEPO]) are considered doping and are therefore forbidden in sports; however, the scientific evidence behind doping is frequently weak. We aimed to determine the effects of rHuEPO treatment in well trained cyclists on maximal, submaximal, and race performance and on safety, and to present a model clinical study for doping research on other substances. METHODS: We did this double-blind, randomised, placebo-controlled trial at the Centre for Human Drug Research in Leiden (Netherlands)...
June 29, 2017: Lancet Haematology
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