keyword
MENU ▼
Read by QxMD icon Read
search

Cyclist

keyword
https://www.readbyqxmd.com/read/28550750/mobile-phone-conversations-listening-to-music-and-quiet-electric-cars-are-traffic-sounds-important-for-safe-cycling
#1
A Stelling-Konczak, G P van Wee, J J F Commandeur, M Hagenzieker
Listening to music or talking on the phone while cycling as well as the growing number of quiet (electric) cars on the road can make the use of auditory cues challenging for cyclists. The present study examined to what extent and in which traffic situations traffic sounds are important for safe cycling. Furthermore, the study investigated the potential safety implications of limited auditory information caused by quiet (electric) cars and by cyclists listening to music or talking on the phone. An Internet survey among 2249 cyclists in three age groups (16-18, 30-40 and 65-70year old) was carried out to collect information on the following aspects: 1) the auditory perception of traffic sounds, including the sounds of quiet (electric) cars; 2) the possible compensatory behaviours of cyclists who listen to music or talk on their mobile phones; 3) the possible contribution of listening to music and talking on the phone to cycling crashes and incidents...
May 24, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28543790/are-heart-rate-monitors-valuable-tools-for-diagnosing-arrhythmias-in-endurance-athletes
#2
Robert Gajda, Elżbieta Katarzyna Biernacka, Wojciech Drygas
Millions of physically active individuals worldwide use heart rate monitors (HRMs) to control their exercise intensity. In many cases, the HRM indicates an unusually high heart rate (HR) or even arrhythmias during training. Unfortunately, studies assessing the reliability of these devices to help control HR disturbances during exercise do not exist. We examined 142 regularly training endurance runners and cyclists, aged 18-51, with unexplained HR abnormalities indicated by various HRMs to assess the utility of HRMs in diagnosing exertion-induced arrhythmias...
May 19, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28537540/-e-bikers-are-more-often-seriously-injured-in-bicycle-accidents-results-from-the-groningen-bicycle-accident-database
#3
H P A M Poos, T L Lefarth, J S Harbers, K W Wendt, M El Moumni, I H F Reininga
OBJECTIVE: Analysing injury types, injury severity and mortality in victims of accidents with electric bicycles in comparison with conventional bicycles. DESIGN: Prospective cohort study. METHOD: Data of patients treated at the Accident & Emergency Department of the University Medical Center Groningen after a bicycle accident are being entered in a database since 2014. We have analysed this database for accidents with electric bicycles (e-bikes) and conventional bicycles occurring among adult patients for the period of July 2014 to May 2016...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28535722/anisotropic-polyethersulfone-foam-for-bicycle-helmet-liners-to-reduce-rotational-acceleration-during-oblique-impact
#4
Kelly Vanden Bosche, Yasmine Mosleh, Bart Depreitere, Jos Vander Sloten, Ignaas Verpoest, Jan Ivens
Although current standard bicycle helmets protect cyclists against linear acceleration, they still lack sufficient protection against rotational acceleration during oblique impact events. Rotational acceleration is correlated with serious traumatic brain injuries such as acute subdural haematoma and thus should be minimized. This study proposes using highly anisotropic polyethersulfone foam for bicycle helmet liners in order to limit the rotational acceleration. Helmet prototypes, made of polyethersulfone foam with cell anisotropy direction perpendicular to the head, have been produced and compared to a standard commercial helmet...
May 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28535477/the-effect-of-crash-characteristics-on-cyclist-injuries-an-analysis-of-virginia-automobile-bicycle-crash-data
#5
Erin Robartes, T Donna Chen
This paper examines bicyclist, automobile driver, vehicle, environmental, and roadway characteristics that influence cyclist injury severity in order to determine which factors should be addressed to mitigate the worst bicyclist injuries. An ordered probit model is used to examine single bicycle-single vehicle crashes from Virginia police crash report data from 2010 to 2014. Five injury severity levels are considered: fatalities, severe injuries, minor or possible injuries, no apparent injuries, and no injury...
May 20, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28530476/time-trials-versus-time-to-exhaustion-tests-effects-on-critical-power-w-and-oxygen-uptake-kinetics
#6
Bettina Karsten, Jonathan Baker, Fernando Naclerio, Andreas Klose, Antonino Bianco, Alfred Nimmerichter
PURPOSE: To investigate single-day time-to-exhaustion (TTE) and time trial (TT) based laboratory tests values of critical power (CP), Wprime (W') and respective oxygen kinetics responses. METHODS: Twelve cyclists performed a maximal ramp test followed by three TTE and three TT efforts interspersed by a 60-min recovery between efforts. Oxygen uptake was measured during all trials. The mean response time (MRT) was calculated as a description of the overall V̇O2 kinetic response from the onset to 2 min of exercise...
May 22, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28503242/surgical-excision-of-perineal-nodular-induration-a-cyclist-s-third-testicle
#7
Mohannad A Awad, Gregory P Murphy, Thomas W Gaither, E Charles Osterberg, Thomas A Sanford, Andrew E Horvai, Benjamin N Breyer
Perineal nodular induration (PNI), or biker's nodule, is a rare, bothersome, pseudotumour. Herein, we describe the surgical technique used to treat a healthy cyclist who developed an enlarging PNI for five years that grew into a perineal mass. The mass prevented him from cycling due to worsening discomfort and heaviness. The PNI-associated mass was successfully removed by wide surgical excision and a local advancement flap. Subsequently, the patient resumed cycling. Histopathology report demonstrated a benign lesion with abundant ropy collagen with native smooth muscle, vessels, and rare fibroblast-like spindle cells...
May 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28497286/the-influence-of-drinking-fluid-on-endurance-cycling-performance-a-meta-analysis
#8
REVIEW
Justin J Holland, Tina L Skinner, Christopher G Irwin, Michael D Leveritt, Eric D B Goulet
BACKGROUND: Fluid replacement during cycling exercise evolves on a spectrum from simply drinking to thirst to planned structured intake, with both being appropriate recommendations. However, with mixed findings suggesting fluid intake may or may not improve endurance cycling performance (ECP) in a diverse range of trained individuals, there is a clear need for summarised evidence regarding the effect of fluid consumption on ECP. OBJECTIVES: (1) Determine the magnitude of the effect of drinking fluid on performance during cycling exercise tasks of various durations, compared with no drinking; (2) examine the relationship between rates of fluid intake and ECP; and (3) establish fluid intake recommendations based on the observations between rates of fluid intake and ECP...
May 12, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28495846/dispelling-the-myth-that-habitual-caffeine-consumption-influences-the-performance-response-to-acute-caffeine-supplementation
#9
Lívia de Souza Gonçalves, Vitor de Salles Painelli, Guilherme Yamaguchi, Luana Farias de Oliveira, Bryan Saunders, Rafael Pires da Silva, Erika Maciel, Guilherme Giannini Artioli, Hamilton Roschel, Bruno Gualano
OBJECTIVE: To investigate the influence of habitual caffeine intake on exercise performance to acute caffeine supplementation. METHODS: A double-blind, crossover, counterbalanced study was performed. Forty endurance-trained cyclists were allocated into tertiles according to their daily caffeine intake: low (58 ± 29 mg(.)d(-1)), moderate (143 ± 25 mg(.)d(-1)), and high consumers (351 ± 139 mg(.)d(-1)). Participants completed three trials in which they performed simulated cycling time-trials in the fastest time possible following ingestion of: caffeine (CAF: 6 mg(...
May 11, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28494259/mechanisms-underlying-cognitive-conspicuity-in-the-detection-of-cyclists-by-car-drivers
#10
Joceline Rogé, Daniel Ndiaye, Isabelle Aillerie, Stéphane Aillerie, Jordan Navarro, Fabrice Vienne
OBJECTIVE: The aim of this study was to evaluate the visibility of cyclists for motorists in a simulated car driving task. BACKGROUND: In several cases involving collisions between cars and cyclists, car drivers failed to detect the latter in time to avoid collision because of their low conspicuity. METHOD: 2 groups of motorists (29.2 years old), including 12 cyclist-motorists and 13 non-cyclist-motorists, performed a vulnerable road user detection task in a car-driving simulator...
May 7, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28493819/the-choice-of-freely-preferred-cadence-by-trained-nonprofessional-cyclists-may-not-be-characterized-by-mechanical-efficiency
#11
Yitzhak Weinstein, Ron Mor-Unikowski, Shachar Nice, Shraga Hocherman, Omri Inbar
BACKGROUND: Most cycling studies involve professional cyclists. Because training may affect riding style, it is of interest to determine the physiological basis for the personal choice of cycling cadence in nonprofessional cyclists. METHODS: Eleven nonprofessional (5.2±1.7-year-riding experience) male road cyclists, aged 35.0±11.0 years, underwent four separate laboratory test sessions. The first two sessions included habituation, anthropometry, V˙O2max,$\dot V{{\text{O}}_{\text{2}}}{\text{max}},$ and lactate threshold (LaTH) measurements...
May 11, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28482367/accuracy-of-cycling-power-meters-against-a-mathematical-model-of-treadmill-cycling
#12
Thomas Maier, Lucas Schmid, Beat Müller, Thomas Steiner, Jon Peter Wehrlin
The aim of this study was to compare the accuracy among a high number of current mobile cycling power meters used by elite and recreational cyclists against a first principle-based mathematical model of treadmill cycling. 54 power meters from 9 manufacturers used by 32 cyclists were calibrated. While the cyclist coasted downhill on a motorised treadmill, a back-pulling system was adjusted to counter the downhill force. The system was then loaded 3 times with 4 different masses while the cyclist pedalled to keep his position...
May 8, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28482177/-outta-my-way-individual-and-environmental-correlates-of-interactions-between-pedestrians-and-vehicles-during-street-crossings
#13
Marie-Soleil Cloutier, Ugo Lachapelle, Andrée-Anne d'Amours-Ouellet, Jacques Bergeron, Sébastien Lord, Juan Torres
Because pedestrian crash rates remain lower than other collision types, surrogate measures such as traffic interactions are now used in road safety research to complement crash history. Using naturalistic data collection, we sought to assess 1) the likelihood of occurrence of interactions between pedestrians and vehicles based on individual and crossing characteristics; and 2) differences in interaction characteristics between children, adult and senior pedestrians. Observations of pedestrian crossing behaviours (n=4687) were recorded at 278 crossings...
May 5, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28474871/effects-of-hydrogen-rich-water-on-prolonged-intermittent-exercise
#14
Alessandro DA Ponte, Nicola Giovanelli, Daniele Nigris, Stefano Lazzer
BACKGROUND: Recent studies showed a positive effect of Hydrogen Rich Water (HRW) intake on acid-basic homeostasis at rest. We investigated 2-weeks of HRW intake on repeated sprint performance and acid-base status during prolonged intermittent cycling exercise. METHODS: In a cross over single-blind protocol, eight trained male cyclists (age [mean ± SD] 41±7 years, body mass 72.3±4.4 kg, height 1.77±0.04 m, maximal oxygen uptake [V̇ O2max] 52.6±4.4 ml·kg-1·min-1) were provided daily with 2 liters of placebo normal water (PLA, pH 7...
April 26, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28467857/one-night-of-sleep-restriction-following-heavy-exercise-impairs-3-km-cycling-time-trial-performance-in-the-morning
#15
John D Chase, Paul A Roberson, Michael J Saunders, Trent A Hargens, Christopher J Womack, Nicholas D Luden
The goal of this project was to examine the influence of a single night of sleep restriction following heavy exercise on cycling time trial performance (TT) and skeletal muscle function in the morning. Seven recreational cyclists (age, 24 ± 7 yrs; VO2peak, 62 ± 4 ml・kg-1・min-1) completed two phases, each consisting of evening (EX1) and next-morning (EX2) exercise sessions. EX1 and EX2 were separated by an assigned sleep condition; a full night of rest (CON, 7.1 ± 0.3 hrs of sleep) or sleep restriction through early waking (SR, 2...
May 3, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28462577/comparison-of-physiological-measures-obtained-using-the-lode-excalibur-sport-cycle-ergometer-and-the-tacx-i-magic-home-training-device
#16
Kevin L Merry
AIM: The aim of this study was to compare several physiological measures obtained using a criterion cycle ergometer (Lode Excalibur Sport) and a commercially available home training device (Tacx i--Magic). METHODS: In a randomised, counterbalanced order, eight male amateur club level cyclists (age 30.4 ± 3.5 years, body mass 75.8 ± 8.1 kg, stature 1.75 ± 0.06 m) completed a submaximal and maximal incremental test on both the Lode Excalibur Sport and the Tacx i-Magic...
April 28, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28460405/validity-and-reliability-of-the-garmin-vector-power-meter-in-laboratory-and-field-cycling
#17
Alfred Nimmerichter, Lukas Schnitzer, Bernhard Prinz, Dieter Simon, Klaus Wirth
To assess the validity and reliability of the Garmin Vector against the SRM power meter, 6 cyclists completed 3 continuous trials at power outputs from 100-300 W at 50-90 rev·min(-1) and a 5-min time trial in laboratory and field conditions. In field conditions only, a 30-s sprint was performed. Data were compared with paired samples t-tests, with the 95% limits of agreement (LoA) and the typical error. Reliability was calculated as the coefficient of variation (CV). There was no significant difference between the devices in power output in laboratory (p=0...
May 1, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28459286/the-maximally-achievable-cycling-cadence-affects-carbohydrate-management-at-moderate-and-heavy-exercise-intensity
#18
Ralph Beneke, Tobias G J Weber, Renate M Leithäuser
Effects of different cycling cadences (RPM) on metabolic rate, blood lactate concentration (BLC), and reliance on carbohydrate (CHO) defined as the fraction of oxygen uptake used for CHO oxidation (relCHO) are highly individual. Whether this depends on the individually maximal achievable RPM obtained at minimized cycling resistance (RPMmax), is unknown. We tested the hypotheses that 1) the individual freely chosen RPM at an incremental cycle ergometer test (ILT), and 2) relCHO at given BLC levels both depend on RPMmax...
May 1, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28455199/upper-body-compression-garment-physiological-effects-while-cycling-in-a-hot-environment
#19
Iker Leoz-Abaurrea, Roberto Aguado-Jiménez
OBJECTIVE: The purpose of the present study was to investigate the effects of an upper body compression garment (UBCG) on physiologic and perceptual responses while cycling in a hot environment. METHODS: Twenty recreational road cyclists were pair-matched for age, anthropometric data, and fitness level (V̇O2max) and randomly assigned to a control (CON) group (n=10) of cyclists who wore a conventional t-shirt or to a group (n=10) of cyclists who wore UBCG. Test session consisted of cycling at a fixed load (~50% V̇O2max) for 30 minutes at an ambient temperature of ~40ºC (39...
April 25, 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28452866/effects-of-dopamine-and-norepinephrine-on-exercise-induced-oculomotor-fatigue
#20
Charlotte J W Connell, Benjamin Thompson, Jason Turuwhenua, Alexa Srzich, Nicholas Gant
INTRODUCTION: Fatigue-induced impairments in the control of eye movements are detectable via reduced eye movement velocity following a bout of prolonged, strenuous exercise. Slower eye movements caused by neural fatigue within the oculomotor system can be prevented by caffeine and upregulation of central catecholamines may be responsible for this effect. This study explored the individual contribution of dopamine and norepinephrine to fatigue-related impairments in oculomotor control...
April 28, 2017: Medicine and Science in Sports and Exercise
keyword
keyword
3303
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"