Abstract：
:This study determined the pacing strategies and performance responses of six well-trained cyclists/triathletes (peak O2 uptake 66.4+/-3.7 ml x kg(-1) x min(-1), mean+/-SD) during seven simulated time-trials (TT) conducted on a wind-braked cycle ergometer. All subjects first performed a 40 km familiarisation ride (TT1). They were then informed they would be riding a further four 40 km TT for the purpose of a reliability study. Instead, the actual distances ridden for the next three TT were a random order of 34 (TT2), 40 (TT3) and 46 km (TT4). The only feedback given to subjects during TT1-4 was the percentage distance of that ride remaining. During a further 40 km TT (TT5) subjects were allowed to view their heart rate (HR) responses throughout the ride. Despite the significantly different performance times across the three distances (47:23+/-4:23 vs 55:57+/-3:24 vs 65:41+/-3:56 min for the 34, 40 and 46 km respectively, P<0.001), average power output (296+/-48 vs 294+/-48 vs 286+/-40 W) and HR (173+/-11 vs 174+/-12 vs 173+/-12 beats x min(-1)) were similar. The true nature of the first part of the study was then revealed to subjects who subsequently completed an additional 34 km and 46 km TT TT6-7) in which the actual and perceived distance ridden was the same. Power output and HR responses were similar for both unknown (TT2 and TT6) and known (TT4 and TT7) rides for both distances: 296+/-48 vs 300+/-55 W and 173+/-11 vs 177+/-11 beats x min(-1) (34 km) and 286+/-40 vs 273+/-42 W and 173+/-12 vs 174+/-12 beats x min(-1) (46 km). In conclusion, well-trained cyclists rode at similar power outputs and HR during time trials they perceived to be the same distance, but which varied in actual distance from 34 to 46 km.
journal_name
J Sci Med Sportjournal_title
Journal of science and medicine in sportauthors
Nikolopoulos V,Arkinstall MJ,Hawley JAdoi
10.1016/s1440-2440(01)80031-1keywords:
subject
Has Abstractpub_date
2001-06-01 00:00:00pages
212-9issue
2eissn
1440-2440issn
1878-1861pii
S1440-2440(01)80031-1journal_volume
4pub_type
临床试验,杂志文章abstract：OBJECTIVES:To compare the efficacy of two exercise programmes in reducing pain and disability for individuals with non-specific low back pain and to examine the underlying mechanical factors related to pain and disability for individuals with NSLBP. DESIGN:A single-blind, randomized controlled trial. METHODS:Eighty p...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jsams.2014.11.006
更新日期：2015-11-01 00:00:00
abstract：OBJECTIVES:This study aimed to (1) investigate cardiometabolic risk markers in young women (18-30 years) with overweight/obesity, and (2) establish whether the measures of waist circumference and body mass index possess similar associations of cardiometabolic risk. DESIGN:Cross-sectional. METHODS:Cardiometabolic risk...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
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更新日期：2014-11-01 00:00:00
abstract：:Injuries cause more morbidity among soldiers in the U.S. Army than any other health condition. Over two-thirds of U.S. soldiers' injuries occur gradually from cumulative micro-traumatic damage to the musculoskeletal system as a result of physical training activities. Paradoxically, the very physical training activitie...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2018.02.011
更新日期：2018-11-01 00:00:00
abstract：:Many overweight and obese individuals have difficulty in performing aerobic fitness tests that require maximal exertion. Therefore, the purpose of this study was to investigate the reliability of the Aerobic Power Index (API) submaximal aerobic exercise test, as well as associated variables consisting of oxygen uptake...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2006.05.024
更新日期：2007-06-01 00:00:00
abstract：:The current schedule of the Brazilian Soccer Championship may not give players enough recovery time between games. This could increase the chances of muscle damage and impaired performance. We hypothesized that plasma creatine kinase (CK) activity could be a reliable indirect marker of muscle overload in soccer player...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2007.10.004
更新日期：2009-01-01 00:00:00
abstract：OBJECTIVES:We investigated if cold water immersion (CWI) affects exercise performance during a prolonged intermittent sprint test (IST), designed to mimic activity patterns of team-sports. DESIGN:Randomized-crossover design. METHODS:Ten male team-sport players completed 3 IST protocols (two 40-min "halves" of repeate...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jsams.2019.07.002
更新日期：2019-12-01 00:00:00
abstract：OBJECTIVES:This research explores snowsport injury trends in western Canadian resorts over the decade 2008-2018. DESIGN:Ecological study. METHODS:Injury and participation data on alpine skiing and snowboarding was provided by the Canada West Ski Areas Association for 2008-2018. Inclusion criteria were met by 29 of 52...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2020.12.001
更新日期：2020-12-11 00:00:00
abstract：OBJECTIVES:The aim of this study was to investigate if and to what extent small lateral wedges inserted under the ski boot, known as canting, could impact knee kinematics/kinetics, balance, and neuromuscular activity in recreational alpine skiers in the laboratory setting. DESIGN:Experimental, crossover study with rep...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2020.05.009
更新日期：2020-05-17 00:00:00
abstract：:Prior electromyographic (EMG) analyses of the tennis serve have focused on the muscles in the hitting arm and shoulder region. This preliminary study aimed to examine the muscle activation patterns of selected lower trunk muscles during three different types of tennis serve--flat, topspin, and slice. Five male highly ...
journal_title：Journal of science and medicine in sport
pub_type： 临床试验,杂志文章
doi：10.1016/s1440-2440(03)80276-1
更新日期：2003-12-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/s1440-2440(01)80004-9
更新日期：2001-03-01 00:00:00
abstract：OBJECTIVES:To develop a valid and reliable video-based decision-making test to examine and monitor the decision-making performance of Australian football umpires. DESIGN:Validation assessments with test re-test reliability. METHODS:A video-based decision-making test was developed from a pool of 156 video-based decisi...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2013.08.001
更新日期：2014-09-01 00:00:00
abstract：OBJECTIVES:To explore the hip and knee joint kinematics as well as muscle activation between participants with patellofemoral pain syndrome (PFPS) and controls, and to investigate the immediate effect of proximal femoral rotational taping on pain, joint kinematics, and muscle activation during single-leg squat (SLS). ...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2014.07.009
更新日期：2015-07-01 00:00:00
abstract：OBJECTIVES:To assess the physiological and performance effects of a 12% carbohydrate-electrolyte beverage consumed at practically applicable time-points (i.e., before each half) throughout simulated soccer match-play. DESIGN:Randomised, counterbalanced, crossover. METHODS:Fed players (n=15) performed 90-min of soccer...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jsams.2017.04.015
更新日期：2017-12-01 00:00:00
abstract：:Despite frequent media accounts of drownings in the United Arab Emirates, little was known about the epidemiology and prevention of such incidents. The research objective was to assess newspapers as a national source on incidence, activities, and risk factors for drowning in this high-income media-rich developing coun...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2007.08.016
更新日期：2009-01-01 00:00:00
abstract：OBJECTIVES:The purpose of this study was to examine whether the use of machine learning improved the ability of a neuromuscular screen to identify injury risk factors in elite male youth football players. DESIGN:Prospective cohort study. METHODS:355 elite youth football players aged 10-18 years old completed a prospe...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2020.04.021
更新日期：2020-11-01 00:00:00
abstract：OBJECTIVES:We determined whether perceptually-regulated, high-intensity intermittent runs in hypoxia and normoxia induce similar running mechanics adjustments within and between intervals. DESIGN:Within-participants repeated measures. METHODS:Nineteen trained runners completed a high-intensity intermittent running pr...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2020.04.001
更新日期：2020-11-01 00:00:00
abstract：:Changes in magnitude and timing of rearfoot eversion and tibial internal rotation by foot orthoses and their contributions to vertical ground reaction force and knee joint moments are not well understood. The objectives of this study were to test if orthoses modify the magnitude and time to peak rearfoot eversion, tib...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2008.05.001
更新日期：2009-11-01 00:00:00
abstract：OBJECTIVES:This study explores the reliability and validity of the SenseWear Armband (SWA) and Actical (ACT) for free-living total energy expenditure, and energy expenditure during rest and light-to-moderate exercises (walking, ergocycling). DESIGN:Participants wore the 2 devices during 7 days (free-living) and then p...
journal_title：Journal of science and medicine in sport
pub_type： 临床试验,杂志文章
doi：10.1016/j.jsams.2014.11.001
更新日期：2016-01-01 00:00:00
abstract：:The aims of this study were to assess the durations of the different arm and leg stroke phases (propulsion, glide, and recovery) and the temporal arm-leg gaps between 12 competitive and 12 recreational breaststroke swimmers. The mean ages and best times for a 50-m breaststroke were, respectively, (recreational: 16.9+/...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2008.01.001
更新日期：2009-05-01 00:00:00
abstract：:The epidemiological rationale for a focus on physical activity (PA) among Aboriginal and Torres Strait Islander (ATSI) people is compelling. PA programs have significant potential to benefit ATSI people and their communities through their contribution to reducing chronic disease, improving physical and mental health a...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章,评审
doi：10.1016/s1440-2440(04)80276-7
更新日期：2004-04-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2018.06.011
更新日期：2019-02-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
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更新日期：1998-01-01 00:00:00
abstract：BACKGROUND:An estimated 2.7 million non-fatal unintentional sports and recreational injuries are treated in U.S. hospital emergency departments (EDs) annually. However, little is known about the number of sports and recreational injuries resulting from violent behavior. METHODS:Data for 2001-2003 on sports and recreat...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2006.03.004
更新日期：2006-12-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2015.12.516
更新日期：2016-10-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
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更新日期：2010-01-01 00:00:00
abstract：OBJECTIVE:To reduce the number of transgressions to the rule, the occurrence of violent acts and to prevent injuries, Hockey Québec adopted the Fair-Play Program (FPP). The objective of the present study was to evaluate the effectiveness of the FPP. METHODS:52 Bantam (14-15 years) teams participated in this cohort stu...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
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更新日期：2005-09-01 00:00:00
abstract：OBJECTIVES:To measure the change in tackling technique of rugby union players following an acute bout of physically fatiguing exercise. DESIGN:Randomised cross-over study design with a physical fatigue condition and no-physical fatigue condition (control). METHODS:Nineteen male amateur club rugby union players (n=19)...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
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更新日期：2020-11-01 00:00:00
abstract：OBJECTIVES:While there is some evidence that aerobic fitness is positively associated with executive functioning in children, evidence for a relation between children's daily physical activity and their executive functioning is limited. The objective was to examine associations between objectively measured daily physic...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2014.09.006
更新日期：2015-11-01 00:00:00
abstract：OBJECTIVES:In winter terrain parks special airbags are used for skiers and snowboarders to practice jumps and achieve safe landings. However, in 2010 two skiers landed at the end of oval airbags. One suffered fatal, the other severe, injuries. The aim of this study was to identify parameters that lead to jumping over t...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2018.09.229
更新日期：2019-08-01 00:00:00
abstract：OBJECTIVES:In order to quantify the effects of physical activity such as walking on chronic disease, accurate measurement of physical activity is needed. The objective of this study was to determine the validity and reliability of a new activity monitor, the Fitbit One, in a population of healthy adults. DESIGN:Cross-...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jsams.2013.10.241
更新日期：2014-09-01 00:00:00
