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https://www.readbyqxmd.com/read/28211905/anaerobic-capacityestimated-in-a-single-supramaximal-test-in-cycling-validity-and-reliability-analysis
#1
Willian Eiji Miyagi, Rodrigo de Araujo Bonetti de Poli, Marcelo Papoti, Romulo Bertuzzi, Alessandro Moura Zagatto
The aim was to verify the validity (i.e., study A) and reliability (i.e., study B) of the alternative maximal accumulated oxygen deficit determined using onlya supramaximal effort (MAODALT)to estimate anaerobic capacity [i.e., estimated by the gold standard maximal accumulated oxygen deficit method (MAOD)] during cycling. In study A, the effects of supramaximal intensities on MAODALT and the comparison with the MAOD were investigated in fourteen active subjects (26 ± 6 years). In study B, the test-retest reliability was investigated, where fourteen male amateur cyclists (29 ± 5 years) performed the MAODALT twice at 115% of the intensity associated to maximal oxygen uptake ()...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28209593/comparing-icd-10-external-cause-codes-for-pedal-cyclists-with-self-reported-crash-details
#2
Ben Beck, Christina L Ekegren, Peter Cameron, Mark Stevenson, Rodney Judson, Andrew Bucknill, Elton Edwards, Belinda Gabbe
Accurate coding of injury event information is critical in developing targeted injury prevention strategies. However, little is known about the validity of the most universally used coding system, the International Classification of Diseases (ICD-10), in characterising crash counterparts in pedal cycling events. This study aimed to determine the agreement between hospital-coded ICD-10-AM (Australian modification) external cause codes with self-reported crash characteristics in a sample of pedal cyclists admitted to hospital following bicycle crashes...
February 16, 2017: Injury Prevention: Journal of the International Society for Child and Adolescent Injury Prevention
https://www.readbyqxmd.com/read/28199799/the-efficacy-of-protein-supplementation-during-recovery-from-muscle-damaging-concurrent-exercise
#3
Lee Eddens, Sarah Browne, Emma J Stevenson, Brad Sanderson, Ken van Someren, Glyn Howatson
This study investigated the effect of protein supplementation on recovery following muscle-damaging exercise, which was induced with a concurrent exercise design. Twenty-four well-trained male cyclists were randomised to three independent groups receiving 20 g protein hydrolysate, iso-caloric carbohydrate or low-calorific placebo supplementation, per serve. Supplement serves were provided twice daily, from the onset of the muscle-damaging exercise, for a total of four days and in addition to a controlled diet (6 g•kg<sup>-1</sup>•d<sup>-1</sup> carbohydrate, 1...
February 15, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28198465/fatigue-related-impairments-in-oculomotor-control-are-prevented-by-norepinephrine-dopamine-reuptake-inhibition
#4
Charlotte J W Connell, Benjamin Thompson, Jason Turuwhenua, Alexa Srzich, Nicholas Gant
Fatigue-induced reductions in saccade velocity have been reported following acute, prolonged exercise. Interestingly, the detrimental impact of fatigue on oculomotor control can be prevented by a moderate dose of caffeine. This effect may be related to central catecholamine upregulation via caffeine's action as an adenosine antagonist. To test this hypothesis, we compared the protective effect of caffeine on oculomotor control post-exercise to that of a norepinephrine-dopamine reuptake inhibitor. Within a placebo-controlled crossover design, 12 cyclists consumed placebo, caffeine or a norepinephrine-dopamine reuptake inhibitor (bupropion) during 180 minutes of stationary cycling...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28193794/alcohol-policies-and-alcohol-related-motor-vehicle-crash-fatalities-among-young-people-in-the-us
#5
Scott E Hadland, Ziming Xuan, Vishnudas Sarda, Jason Blanchette, Monica H Swahn, Timothy C Heeren, Robert B Voas, Timothy S Naimi
BACKGROUND: Motor vehicle crashes (MVCs) are a leading cause of death among young people in the United States. We examined the relationship between states' alcohol policy environments and alcohol-related MVC fatalities among children, adolescents, and young adults under the minimum legal drinking age of 21 years. METHODS: We used the Alcohol Policy Scale (APS), an assessment of 29 alcohol policies across 50 states and Washington, DC, developed with the assistance of an interdisciplinary Delphi panel...
February 13, 2017: Pediatrics
https://www.readbyqxmd.com/read/28190422/cyclists
#6
Kristiann C Heesch, Amy Schramm, Ashim Kumar Debnath, Narelle Haworth
Issues addressed: Cyclists' perceptions of harassment from motorists discourages cycling. This study examined changes in cyclists' reporting of harassment pre- to post-introduction of the Queensland trial of the minimum passing distance road rule amendment (MPD-RRA).Methods: Cross-sectional online surveys of cyclists in Queensland, Australia were conducted in 2009 (pre-trial; n=1758) and 2015 (post-trial commencement; n=1997). Cyclists were asked about their experiences of harassment from motorists while cycling...
February 9, 2017: Health Promotion Journal of Australia
https://www.readbyqxmd.com/read/28189058/using-data-mining-techniques-to-predict-the-severity-of-bicycle-crashes
#7
Gabriele Prati, Luca Pietrantoni, Federico Fraboni
To investigate the factors predicting severity of bicycle crashes in Italy, we used an observational study of official statistics. We applied two of the most widely used data mining techniques, CHAID decision tree technique and Bayesian network analysis. We used data provided by the Italian National Institute of Statistics on road crashes that occurred on the Italian road network during the period ranging from 2011 to 2013. In the present study, the dataset contains information about road crashes occurred on the Italian road network during the period ranging from 2011 to 2013...
February 8, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28188371/the-effect-of-functional-overreaching-on-parameters-of-autonomic-heart-rate-regulation
#8
Clint R Bellenger, Rebecca L Thomson, Eileen Y Robertson, Kade Davison, Maximillian J Nelson, Laura Karavirta, Jonathan D Buckley
PURPOSE: Correlations between fatigue-induced changes in performance and maximal rate of HR increase (rHRI) may be affected by differing assessment workloads. This study evaluated the effect of assessing rHRI at different workloads on performance tracking, and compared this with HR variability (HRV) and HR recovery (HRR). METHODS: Performance [5-min cycling time trial (5TT)], rHRI (at multiple workloads), HRV and HRR were assessed in 12 male cyclists following 1 week of light training (LT), 2 weeks of heavy training (HT) and a 10-day taper (T)...
February 11, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28186443/highly-increased-troponin-i-levels-following-high-intensity-endurance-cycling-may-detect-subclinical-coronary-artery-disease-in-presumably-healthy-leisure-sport-cyclists-the-north-sea-race-endurance-exercise-study-needed-2013
#9
Øyvind Skadberg, Øyunn Kleiven, Magnus Bjørkavoll-Bergseth, Tor Melberg, Rolf Bergseth, Jone Selvåg, Bjørn Auestad, Ole J Greve, Kenneth Dickstein, Torbjørn Aarsland, Stein Ørn
Background Circulating cardiac troponin levels increase following prolonged intense physical exercise. The aim of this study was to identify participants with highly elevated cardiac troponins after prolonged, high intensity exercise, and to evaluate these for subclinical coronary artery disease. Methods and results Ninety-seven recreational cyclists without known cardiovascular disease or diabetes, participating in a 91 km mountain bike race were included, 74 (76%) were males, age: 43 ± 10 years, race duration: 4...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28181210/the-differences-in-ecgs-interpretation-in-top-level-athletes
#10
Agnieszka A Jakubiak, Krystyna Burkhard-Jagodzińska, Wojciech Król, Marcin Konopka, Dominik Bursa, Dariusz Sitkowski, Marek Kuch, Wojciech Braksator
BACKGROUND: The Ministry of Health in Poland recommends ECG- based cardiovascular screening in athletes, but so far, there is lack of guidelines on preparticipation assessment. We compared different criteria of ECG screening assessment in the group of top-level athletes. AIMS: The aims were to evaluate the prevalence of ECG changes in athletes that necessitate further cardiological work-up according to three criteria in various age groups as well as to identify factors determining the occurrence of changes related and unrelated to the training...
February 9, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28179003/respiratory-outcomes-of-ultrafine-particulate-matter-ufpm-as-a-surrogate-measure-of-near-roadway-exposures-among-bicyclists
#11
Hye-Youn Park, Susan Gilbreath, Edward Barakatt
BACKGROUND: Studies have shown a consistent association between exposure to traffic-related air pollution and adverse health effects. In particular, exposure can be high for cyclists who travel near roadways. The objective of the current study was to examine the relationship between short-term exposure of near-road traffic emissions and acute changes in lung function among individuals who frequently bike in the Sacramento and Davis areas in California. Ultrafine particulate matter (UFPM) was used as a surrogate for near-roadway exposure in this study since the main source of this pollutant is from motor vehicle exhaust...
February 8, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28177737/peak-oxygen-uptake-in-a-sprint-interval-testing-protocol-vs-maximal-oxygen-uptake-in-an-incremental-testing-protocol-and-their-relationship-with-cross-country-mountain-biking-performance
#12
Rafał Hebisz, Paulina Hebisz, Marek Zatoń, Kamil Michalik
The literature finds that the exercise capacity of cyclists is typically assessed using incremental and endurance exercise tests. The aim of the present study was to confirm whether peak oxygen uptake (VO2peak) attained in a sprint interval testing protocol correlated with cycling performance and whether it corresponds to maximal oxygen uptake (VO2max) determined by an incremental testing protocol. A sample of 28 trained mountain bike cyclists executed three performance tests: a) incremental testing protocol (ITP) in which the participant cycled to volitional exhaustion, b) sprint interval testing protocol (SITP) composed of four 30-s maximal intensity cycling bouts interspersed with 90-s recovery periods, c) competition in a simulated MTB race...
December 12, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28177733/the-effects-of-block-training-on-pacing-during-20-km-cycling-time-trial
#13
Vitor Pereira Costa, Luiz Guilherme Antonacci Guglielmo, Carl David Paton
The aim of this study was to determine the effects of block training (BL) on pacing during a 20-km hilly cycling time trial (TT) in trained cyclists. Twenty male cyclists were separated into two groups: control and BL. The training of each cyclist was monitored during a period of 3 weeks. In the first week cyclists performed an overload period of seven consecutive days of high intensity interval training followed by two weeks of normal training. Cyclists performed one TT before intervention and two TT after seven and fourteen days at the end of training...
December 15, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28166122/determinants-of-bone-outcomes-in-adolescent-athletes-at-baseline-the-pro-bone-study
#14
Dimitris Vlachopoulos, Esther Ubago-Guisado, Alan R Barker, Brad S Metcalf, Ioannis G Fatouros, Alexandra Avloniti, Karen M Knapp, Luis A Moreno, Craig A Williams, Luis Gracia-Marco
PURPOSE: The determinants of areal bone mineral density (aBMD) and hip geometry estimates in adolescent athletes are poorly understood. This study aimed to identify the determinants of aBMD and hip geometry estimates in adolescent male athletes. METHODS: One hundred twenty one males (13.1±0.1 years) were measured: 41 swimmers, 37 footballers, 29 cyclists and 14 controls. Dual energy X-ray absorptiometry (DXA) measured aBMD at lumbar spine, femoral neck (FN) and total body...
February 4, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28165641/effects-of-nitrate-supplementation-in-trained-and-untrained-muscle-is-modest-with-initial-high-plasma-nitrite-levels
#15
Peter M Christensen, Nanna K Petersen, Signe N Friis, Eddie Weitzberg, Lars Nybo
Nitrate (NO3(-) ) supplementation resulting in higher plasma nitrite (NO2(-) ) is reported to lower resting mean arterial blood pressure (MAP) and oxygen uptake (VO2 ) during submaximal exercise in non-athletic populations, whereas effects in general are absent in endurance trained individuals. To test whether physiological effects of NO3(-) supplementation depend on local muscular training status or cardiovascular fitness, male endurance-trained cyclists (CYC, n=9, VO2 -max: 64±3 ml/min/kg; mean±SD) and recreational active subjects serving as a control group (CON, n=8, 46±3 ml/min/kg), acutely consumed nitrate-rich beetroot-juice ([NO3(-) ] ~9 mmol) (NIT) or placebo (PLA) with assessment of resting MAP and energy expenditure during moderate intensity (~50% VO2 -max) and incremental leg cycling (LEG-ex) and arm cranking exercise (ARM-ex)...
February 6, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28164747/assessment-of-bicycle-car-accidents-under-four-different-types-of-collision
#16
Laurencas Raslavičius, Liudas Bazaras, Artūras Keršys, Vaidas Lukoševičius, Rolandas Makaras, Valdas Eidukynas
Bicycle riders are among the highest risk group in traffic. A cyclist simulation study captured kinematics and injuries to legs, pelvis, neck, and head for one human body size. We analyzed the number of parameters (forces acting on left and right tibia, head injury criterion, neck tensile force, neck shear force, and pelvic acceleration) for each of the four different cases: bicyclist ride out-residential driveway, motorist overtaking-undetected bicyclist, bicyclist left turn-same direction, and bicyclist right turn-opposite direction...
February 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28163572/knee-problems-and-its-associated-factors-among-active-cyclists-in-eastern-province-saudi-arabia
#17
Abdullatif K Althunyan, Magdy A Darwish, Moataza M Abdel Wahab
INTRODUCTION: Bicycling is one of the most enjoyable aerobic exercises recommended for the promotion of an individual's health. The Eastern Province of Saudi Arabia has seen a huge increase in the number of people who cycle. People have different goals for bicycling, but the injuries they sustain are common. Most of them relate to overuse, particularly of lower body joints. This study was conducted to determine the prevalence of knee problems and factors associated with knee pain in cyclists...
January 2017: Journal of Family & Community Medicine
https://www.readbyqxmd.com/read/28159632/respiratory-and-locomotor-muscle-implications-on-the-vo2-slow-component-and-the-vo2-excess-in-young-trained-cyclists
#18
Ferid Oueslati, Jan Boone, Zouhair Tabka, Said Ahmaidi
We investigated the impact of ramp and constant-load exercise on (i) respiratory muscle fatigue and locomotor muscle oxygenation, (ii) their relationship with the excess VO2 and VO2 slow component (SC). Fourteen male cyclists performed two tests to exhaustion: an incremental ramp and a constant-load exercise with continuous monitoring of expired gases and oxygenation of the vastus lateralis muscle on two separate days. Maximal inspiratory (MIP) and expiratory (MEP) pressure measurements were taken at rest and post- exercise...
January 31, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28158296/characteristics-of-cyclist-crashes-in-italy-using-latent-class-analysis-and-association-rule-mining
#19
Gabriele Prati, Marco De Angelis, Víctor Marín Puchades, Federico Fraboni, Luca Pietrantoni
The factors associated with severity of the bicycle crashes may differ across different bicycle crash patterns. Therefore, it is important to identify distinct bicycle crash patterns with homogeneous attributes. The current study aimed at identifying subgroups of bicycle crashes in Italy and analyzing separately the different bicycle crash types. The present study focused on bicycle crashes that occurred in Italy during the period between 2011 and 2013. We analyzed categorical indicators corresponding to the characteristics of infrastructure (road type, road signage, and location type), road user (i...
2017: PloS One
https://www.readbyqxmd.com/read/28155797/-regular-bike-use-in-nantes-a-combined-health-and-mobility-approach
#20
Marion Gassiot, Fabrice Guyard, Hadrien Bedok, Zoë Héritage, Céline Hemery, Patricia Saraux-Salaün
<ce:para>The health benefits of regular physical activity have now been clearly established. Two initiatives developed in Nantes allowed estimation of the benefits as perceived by local authorities as well as the motivations of cyclists and the general population. The City Council and the metropolitan area of Greater Nantes used the HEAT tool, which identifies the economic health benefit of increasing active forms of transport at the population level. The number of deaths avoided and the economic benefits were calculated by using both current and 2030-projected cycling rates and mortality rates...
June 8, 2016: Santé Publique: Revue Multidisciplinaire Pour la Recherche et L'action
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