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https://www.readbyqxmd.com/read/29786630/effect-of-cadence-on-time-trial-performance-in-recreational-female-cyclists
#1
Patricia L Graham, Robert F Zoeller, Patrick L Jacobs, Michael A Whitehurst
Graham, PL, Zoeller, RF, Jacobs, PL, and Whitehurst, MA. Effect of cadence on time trial performance in recreational female cyclists. J Strength Cond Res 32(6): 1739-1744, 2018-The impact of pedaling cadence on cycling performance remains unresolved especially in female cyclists. The purpose of this study was to determine the effect of cadence on time trial (TT) performance in recreational female cyclists. Ten recreational female cyclists volunteered to participate in this study. Subjects performed 3 exercise sessions: 1 to assess peak oxygen uptake (V[Combining Dot Above]O2peak) and 2 TTs...
June 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29784554/renal-stress-and-kidney-injury-biomarkers-in-response-to-endurance-cycling-in-the-heat-with-and-without-ibuprofen
#2
Brendon P McDermott, Cody R Smith, Cory L Butts, Aaron R Caldwell, Elaine C Lee, Jakob L Vingren, Colleen X Munoz, Laura J Kunces, Keith Williamson, Matthew S Ganio, Lawrence E Armstrong
Exercise, especially in the heat, can contribute to acute kidney injury, which can expedite chronic kidney disease onset. The additional stress of ibuprofen use is hypothesized to increase renal stress. OBJECTIVES: To observe the effects of endurance cycling in the heat on renal function. Secondarily, we investigated the effect of ibuprofen ingestion on kidney stress. DESIGN: Randomized, placebo controlled and observational methods were utilized. METHODS: Forty cyclists (52±9y, 21...
May 16, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29770501/correlation-between-cycling-power-and-muscle-thickness-in-cyclists
#3
Hyung-Jin Lee, Kang-Woo Lee, Yong-Woo Lee, Hee-Jin Kim
INTRODUCTION: The aim of this study was to determine the correlation between muscle thickness (MT) and cycling power in varsity cyclists using ultrasonography (US) and to identify any differences in MT between short- and long-distance cyclists. MATERIALS AND METHODS: Twelve cyclists participated in this study. Real-time two-dimensional B-mode US was used to measure the MT in the anterior thigh, anterior lower leg, and trunk, especially in the abdominal and lumbar regions...
May 17, 2018: Clinical Anatomy
https://www.readbyqxmd.com/read/29769832/validity-and-reliability-of-the-powertap-p1-pedals-power-meter
#4
Jesús G Pallarés, José Ramón Lillo-Bevia
To validate the new PowerTap P1® pedals power meter (PP1), thirty-three cyclists performed 12 randomized and counterbalanced graded exercise tests (100-500 W), at 70, 85 and 100 rev·min-1 cadences, in seated and standing positions. A scientific SRM system and a pair of PP1 pedals continuously recorded cadence and power output data. Significantly lower power output values were detected for the PP1 compared to the SRM for all workloads, cadences, and pedalling conditions (2-10 W, p < 0.05), except for the workloads ranged between 150 W to 350 W at 70 rev·min-1 in seated position (p > 0...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29769818/carbohydrate-mouth-rinse-and-hydration-strategies-on-cycling-performance-in-30-km-time-trial-a-randomized-crossover-controlled-trial
#5
Amanda M J Ferreira, Luiz F Farias-Junior, Thaynan A A Mota, Hassan M Elsangedy, Aline Marcadenti, Telma M A M Lemos, Alexandre H Okano, Ana P T Fayh
The aim of this study was to investigate whether carbohydrate mouth rinse (CMR) improves physical performance of cyclists during a 30-km time trial test and its influence on water balance compared to other strategies of fluid intake. Eleven recreationally trained male cyclists completed a 30 km time trial cycle ergometer under three experimental interventions: (a) CMR, (b) drinking to replace all weight loss (DWL), and (c) drinking "ad libitum" (DAL). Time to complete the 30 km time trial, heart rate, average power, velocity, weight loss, urine color, urine density and pH were evaluated...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29767676/complete-streets-and-adult-bicyclist-fatalities-applying-g-computation-to-evaluate-an-intervention-that-affects-the-size-of-a-population-at-risk
#6
Stephen J Mooney, Caroline Magee, Kolena Dang, Julie C Leonard, Jingzhen Yang, Frederick P Rivara, Beth E Ebel, Ali Rowhani-Rahbar, D Alex Quistberg
"Complete Streets" policies require transportation engineers to make provisions for pedestrians, cyclists and transit users. These policies may make bicycling safer for individual cyclists while increasing overall bicycle fatalities if more individuals cycle due to improved infrastructure. We merged county-level records of Complete Streets policies with Fatality Analysis Reporting System counts of cyclist fatalities occurring between January 2000 and December 2015. Because comprehensive county cycling estimates were not available, we used bicycle commute estimates from the American Community Survey and US Census as a proxy for the cycling population, and limited analysis to 183 counties (accounting for over half the US population) for which cycle commute estimates were consistently non-zero...
May 14, 2018: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29745765/is-the-functional-threshold-power-ftp-a-valid-surrogate-of-the-lactate-threshold
#7
Pedro L Valenzuela, Javier S Morales, Carl Foster, Alejandro Lucia, Pedro de la Villa
PURPOSE: This study aimed to analyze the relationship between the Functional Threshold Power (FTP) and the Lactate Threshold (LT). METHODS: 20 male cyclists performed an incremental test in which the LT was determined. At least 48 h later, they performed a 20-minute time trial and 95% of the mean power output (P20) was defined as FTP. Participants were divided into recreational (Peak Power Output [PPO] < 4.5 W∙kg-1 , n=11) or trained cyclists (PPO > 4.5 W∙kg-1 , n=9) according to their fitness status...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745739/training-performance-and-physiological-predictors-of-a-successful-elite-senior-career-in-junior-competitive-road-cyclists
#8
Ida S Svendsen, Espen Tønnesen, Leif Inge Tjelta, Stein Ørn
PURPOSE: to determine whether training, performance or physiological variables at age 18 can predict which athletes become World Tour (WT) riders at senior level. METHODS: Based on performance level age 23, 80 competitive male cyclists were retrospectively categorised into four groups: Retired (n=21), Club (n=26), Continental (n=24), or WT (n=9). Data collected at age 18 were analysed to determine whether training, performance or physiological variables differed significantly between groups...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29743827/the-effect-of-carbohydrate-mouth-rinse-on-performance-biochemical-and-psychophysiological-variables-during-a-cycling-time-trial-a-crossover-randomized-trial
#9
Amanda M J Ferreira, Luiz F Farias-Junior, Thaynan A A Mota, Hassan M Elsangedy, Aline Marcadenti, Telma M A M Lemos, Alexandre H Okano, Ana P T Fayh
Background: The hypothesis of the central effect of carbohydrate mouth rinse (CMR) on performance improvement in a fed state has not been established, and its psychophysiological responses have not yet been described. The aim of this study was to evaluate the effect of CMR in athletes fed state on performance, biochemical and psychophysiological responses compared to ad libitum water intake. Methods: Eleven trained male cyclists completed a randomized, crossover trial, which consisted of a 30 km cycle ergometer at self-selected intensity and in a fed state...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29743825/creatine-electrolyte-supplementation-improves-repeated-sprint-cycling-performance-a-double-blind-randomized-control-study
#10
Daniel L Crisafulli, Harsh H Buddhadev, Lorrie R Brilla, Gordon R Chalmers, David N Suprak, Jun G San Juan
Background: Creatine supplementation is recommended as an ergogenic aid to improve repeated sprint cycling performance. Furthermore, creatine uptake is increased in the presence of electrolytes. Prior research examining the effect of a creatine-electrolyte (CE) supplement on repeated sprint cycling performance, however, did not show post-supplementation improvement. The purpose of this double blind randomized control study was to investigate the effect of a six-week CE supplementation intervention on overall and repeated peak and mean power output during repeated cycling sprints with recovery periods of 2 min between sprints...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29742235/deaths-and-serious-injuries-due-to-traffic-accidents-in-goi%C3%A3-nia-brazil-2013-the-magnitude-and-associated-factors
#11
Polyana Maria Pimenta Mandacarú, Ionara Vieira Moura Rabelo, Maria Aparecida Alves da Silva, Gabriela Camargo Tobias, Otaliba Libânio de Morais Neto
OBJECTIVE: to identify the magnitude and factors associated with death and serious injuries among victims of traffic accidents in the urban area of Goiânia, Brazil. METHODS: cross-sectional study with linkage between records of the Mortality Information System (SIM) Hospital Information System of the Brazilian National Health System (SIH/SUS) and occurrences of traffic accidents, from January to June 2013; Poisson regression was used. RESULTS: among 9,795 identified victims, there were 155 deaths and 1,225 serious injuries; cyclists (Incidence ratio [IR]=2...
2018: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/29738892/effect-of-short-term-cold-water-immersion-on-muscle-pain-sensitivity-in-elite-track-cyclists
#12
Sebastian Klich, Igor Krymski, Kamil Michalik, Adam Kawczyński
OBJECTIVE: To determine the effect of short-term cold-water immersion (CWI) on muscle pain sensitivity after maximal anaerobic power training in track cyclists. DESIGN: Repeated measures. SETTING: University Laboratory. PARTICIPANTS: 12 elite sprint track cyclists (age 24,75 ± 4,23 years). MAIN OUTCOME MEASURES: PPT measurements were made on dominant lower extremity (right) in 20 reference points, including anterior thigh muscles, posterior thigh muscles and posterior cuff muscles...
May 1, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29726452/healthebikes-smart-e-bike-prototype-for-controlled-exercise-in-telerehabilitation-programs
#13
Patrick Mayr, Markus Falgenhauer, Robert Modre-Osprian, Peter Hofmann, Heimo Traninger, Michael Rath, Günter Schreier
E-Bikes in telerehabilitation programs could be a new intervention for more sustainable rehabilitation results. The aim is to design and build a prototype of an E-Bike usable for rehabilitation - a HEALTHeBIKE. It should avoid over-exercising, work independently of the environment and it should enable cycling in a group despite different reference exercise intensities. To achieve these goals, requirements for this system architecture have been identified. A system architecture including an Arduino microcontroller, an Android smartphone and a telemonitoring platform was presented...
2018: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/29723734/characteristics-of-single-vehicle-crashes-with-e-bikes-in-switzerland
#14
Patrizia Hertach, Andrea Uhr, Steffen Niemann, Mario Cavegn
In Switzerland, the usage and accident numbers of e-bikes have strongly increased in recent years. According to official statistics, single-vehicle accidents constitute an important crash type. Up to date, very little is known about the mechanisms and causes of these crashes. To gain more insight, a survey was conducted among 3658 e-cyclists in 2016. The crash risk and injury severity were analysed using logistic regression models. 638 (17%) e-cyclists had experienced a single-vehicle accident in road traffic since the beginning of their e-bike use...
April 30, 2018: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/29722626/abundance-of-clc-1-chloride-channel-in-human-skeletal-muscle-fibre-type-specific-differences-and-effect-of-training
#15
Martin Thomassen, Morten Hostrup, Robyn M Murphy, Brett A Cromer, Casper Skovgaard, Thomas Petursson Gunnarsson, Peter Møller Christensen, Jens Bangsbo
Cl- channel protein 1 (ClC-1) may be important for excitability and contractility in skeletal muscle, but ClC-1 abundance has not been examined in human muscle. The aim of the present study was to examine ClC-1 abundance in human skeletal muscle, including fibre type specific differences and the effect of exercise training. A commercially available antibody was tested with positive and negative control tissue, and it recognised specifically ClC-1 in the range from 100-150 kDa. Abundance of ClC-1 was 38% higher (P < 0...
May 3, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29718953/estimating-city-level-travel-patterns-using-street-imagery-a-case-study-of-using-google-street-view-in-britain
#16
Rahul Goel, Leandro M T Garcia, Anna Goodman, Rob Johnson, Rachel Aldred, Manoradhan Murugesan, Soren Brage, Kavi Bhalla, James Woodcock
BACKGROUND: Street imagery is a promising and growing big data source providing current and historical images in more than 100 countries. Studies have reported using this data to audit road infrastructure and other built environment features. Here we explore a novel application, using Google Street View (GSV) to predict travel patterns at the city level. METHODS: We sampled 34 cities in Great Britain. In each city, we accessed 2000 GSV images from 1000 random locations...
2018: PloS One
https://www.readbyqxmd.com/read/29712545/myositis-ossificans-delayed-complication-of-severe-muscle-contusion
#17
Giacomo Rossettini, Diego Ristori, Marco Testa
A 39-year-old male nonprofessional cyclist presented to physical therapy reporting deep, stabbing, anterolateral left thigh pain. Clinical findings led the physical therapist to request radiographs, which revealed myositis ossificans in the left thigh. J Orthop Sports Phys Ther 2018;48(5):420. doi:10.2519/jospt.2018.7567.
May 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29708859/bioimpedance-patterns-and-bioelectrical-impedance-vector-analysis-biva-of-road-cyclists
#18
Andrea Giorgi, Maurizio Vicini, Luca Pollastri, Erica Lombardi, Emilio Magni, Andrea Andreazzoli, Marco Orsini, Marco Bonifazi, Henry Lukaski, Hannes Gatterer
Bioelectrical impedance vector-analysis (BIVA) describes cell-mass, cell function and hydration status of an individual or a group. The goal of the present investigation was to provide bioelectrical impedance data for 525 male road cyclists (155 professionals, 79 elite, 59 elite-youth, and 232 amateurs) at the time of their optimal performance level. Data were plotted on the resistance-reactance (R-Xc) graph to characterize cyclists group vectors using BIVA. Compared to the general male population, the mean vector position of the road cyclists indicates a higher body cell mass (BCM) and phase angle (p<0...
April 30, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29707541/personalized-hydration-strategy-attenuates-the-rise-in-heart-rate-and-in-skin-temperature-without-altering-cycling-capacity-in-the-heat
#19
Denise de Melo-Marins, Ana Angélica Souza-Silva, Gabriel Lucas Leite da Silva-Santos, Francisco de Assis Freire-Júnior, Jason Kai Wei Lee, Orlando Laitano
The optimal hydration plan [i.e., drink to thirst, ad libitum (ADL), or personalized plan] to be adopted during exercise in recreational athletes has recently been a matter of debate and, due to conflicting results, consensus does not exist. In the present investigation, we tested whether a personalized hydration strategy based on sweat rate would affect cardiovascular and thermoregulatory responses and exercise capacity in the heat. Eleven recreational male cyclists underwent two familiarization cycling sessions in the heat (34°C, 40% RH) where sweat rate was also determined...
2018: Frontiers in Nutrition
https://www.readbyqxmd.com/read/29706822/high-intensity-sport-specific-cardiac-rehabilitation-training-of-a-22-year-old-competitive-cyclist-after-spontaneous-coronary-artery-dissection
#20
Nicholas Weber, Adam Weber, Pasquale Carbone, Anne Lawrence, Tim Bilbrey, Jeffrey M Schussler, Jenny Adams
A 22-year-old man with spontaneous coronary artery dissection wanted to assess the feasibility of returning to competitive cycling. He was referred to the cardiac rehabilitation (CR) program at Baylor Hamilton Heart and Vascular Hospital where staff designed a high-intensity, sport-specific training program that simulated the movements and forces associated with his goal activity. The program was symptom limited and enabled the patient to train earlier and at a higher intensity than is typically allowed in conventional CR programs...
April 2018: Proceedings of the Baylor University Medical Center
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