Abstract:
:The purpose of this study was to test the hypothesis that increased availability of blood-borne glucose would improve endurance after carbohydrate loading. A single-leg exercise model was employed, taking advantage of the fact that supercompensation of muscle glycogen occurs only in a previously exercised limb. Endurance time to exhaustion at 70% of maximal oxygen uptake (VO2 max) was determined for 11 males and three females who were then allocated to a control group or a high-carbohydrate (CHO) group. For 3 days following Test 1 the control group maintained a prescribed normal diet whilst the CHO group increased the proportion of energy derived from carbohydrate (62.1 +/- 4.3% cf. 43.9 +/- 2.0%, P less than 0.01). The endurance test was then repeated using the leg that was inactive during Test 1. Endurance time was increased on Test 2 (123.7 +/- 43.2 min cf. 98.5 +/- 21.9 min, P less than 0.05 one-tailed test) for the CHO group but not for the control group (101.8 +/- 21.7 min cf. 107.5 +/- 9.1 min, NS). There was no indication of enhanced carbohydrate metabolism during Test 2 for the CHO group but mean heart rate was lower during Test 2 than during Test 1 (145 +/- 14 beat min-1 cf. 152 +/- 12 beat min-1, P less than 0.05). These results suggest that the prior consumption of a high-carbohydrate diet improves endurance during high-intensity cycling with a limb with normal muscle glycogen concentration.
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
Hardman AE,Williams Cdoi
10.1080/02640418908729831subject
Has Abstractpub_date
1989-07-01 00:00:00pages
127-38issue
2eissn
0264-0414issn
1466-447Xjournal_volume
7pub_type
杂志文章,评审abstract::The aim of the present study was to examine reliability and construct convergent validity of Player Load™ (PL) from trunk-mounted accelerometry, expressed as a cumulative measure and an intensity measure (PL · min-1). Fifteen male participants twice performed an overground football match simulation that included four ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2016.1229015
更新日期:2017-09-01 00:00:00
abstract::The number and type of landings performed after blocking during volleyball matches has been related to the potential risk of ACL injury. The aim of the present study was to determine whether gender affects the frequency of specific blocking landing techniques with potential risk of ACL injury from the perspective of f...
journal_title:Journal of sports sciences
pub_type: 杂志文章
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abstract::The aim of the current study was twofold: (1) to validate the use of action sport cameras for quantifying focus of visual attention in sailing and (2) to apply this method to examine whether an external focus of attention is associated with better performance in upwind sailing. To test the validity of this novel quant...
journal_title:Journal of sports sciences
pub_type: 杂志文章
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abstract::Although elite athletes have been reported to be high academic achievers, many elite soccer players struggle with a stereotype of being low academic achievers. The purpose of this study was to compare the academic level (pre-university or pre-vocational) and self-regulatory skills (planning, self-monitoring, evaluatio...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2010.516270
更新日期:2010-12-01 00:00:00
abstract::The present study examined the extent to which scores on the Dispositional Flow Scale-2 (DFS-2) could differentiate individuals who frequently experience flow characteristics in physical activity from those who do not. A total of 993 participants completed the Japanese version of the DFS-2. Latent class factor analysi...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2012.695083
更新日期:2012-01-01 00:00:00
abstract::In 19 elite schoolboy rowers, the relationships between anthropometric characteristics, metabolic parameters, strength variables and 2000-m rowing ergometer performance time were analysed to test the hypothesis that a combination of these variables would predict performance better than either individual variables or o...
journal_title:Journal of sports sciences
pub_type: 杂志文章
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更新日期:1998-11-01 00:00:00
abstract::The aim of this study was to identify the effects of adding spatial references during football small-sided games in youth players' tactical and physical performance. Twelve under-15 players performed a Gk+ 6v6+ Gk game under two playing conditions: (i) without spatial references (CONTROL condition); (ii) with spatial ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2018.1523671
更新日期:2019-04-01 00:00:00
abstract::Many of the factors identified as influencing the home advantage have an underlying social basis, presumably through the influence exerted by the home crowd. Beliefs in the home advantage and the causes of that advantage also have a social basis: sports coverage and fan discourse focus on some aspects of the phenomeno...
journal_title:Journal of sports sciences
pub_type: 杂志文章
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更新日期:2005-04-01 00:00:00
abstract::The aim of this study was to assess isokinetic torque, work and power between non-injured, ACL (anterior cruciate ligament)-deficient and ACL-reconstructed individuals. Ten healthy, non-injured individuals, seven unilateral ACL-deficient individuals and six unilateral ACL-reconstructed individuals were assessed for is...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/026404102320219392
更新日期:2002-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:2020-10-22 00:00:00
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journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1993-04-01 00:00:00
abstract::The aims of the present study were to examine quantitatively ground reaction forces, kinematics, and muscle activations during the windmill softball pitch, and to determine relationships between knee valgus and muscle activations, ball velocity and muscle activation as well as ball velocity and ground reaction forces....
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章
doi:10.1080/02640414.2011.576692
更新日期:2011-07-01 00:00:00
abstract::This study sought to determine the association of relative age and performance of young elite basketball players. The distribution of the birth dates, heights, positions, classification and performance of the male and female participants (n = 2395) of the U16, U18 and U20 European Basketball Championships were analyse...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2015.1122204
更新日期:2016-08-01 00:00:00
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journal_title:Journal of sports sciences
pub_type: 杂志文章
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更新日期:2018-06-01 00:00:00
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journal_title:Journal of sports sciences
pub_type: 杂志文章
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更新日期:2017-01-01 00:00:00
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journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章
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更新日期:2012-01-01 00:00:00
abstract::The aim of this study was to assess fatigue during a simulated cross-country skiing sprint competition based on skating technique. Sixteen male skiers performed a 30-m maximal skiing speed test and four 850-m heats with roller skies on a tartan track, separated by 20 min recovery between heats. Physiological variables...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410903081860
更新日期:2009-08-01 00:00:00
abstract::State anxiety is known to affect far aiming tasks, but less is known about the effects of state anxiety on running and aiming while running. Therefore, in the current study participants ran on a treadmill at their preferred speed in a low- and high-anxiety condition. In both conditions, running was combined with dart ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
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更新日期:2012-01-01 00:00:00
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journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章
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更新日期:2011-09-01 00:00:00
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journal_title:Journal of sports sciences
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journal_title:Journal of sports sciences
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journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
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abstract::The relationship between external training load and session rating of perceived exertion (s-RPE) training load and the impact that playing experience, playing position and 2-km time-trial performance had on s-RPE training load were explored. From 39 Australian Football players, 6.9 ± 4.6 training sessions were analyse...
journal_title:Journal of sports sciences
pub_type: 杂志文章
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更新日期:2015-01-01 00:00:00
abstract::The purpose of the present study was to analyse the variability in clubhead presentation to the ball and the resulting ball impact location on the club face for a range of golfers of different ability. A total of 285 male and female participants hit multiple shots using one of four proprietary drivers. Self-reported h...
journal_title:Journal of sports sciences
pub_type: 杂志文章
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更新日期:2012-01-01 00:00:00
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journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
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更新日期:2012-01-01 00:00:00
abstract::The aim of this study was to examine the effect of an enrichment programme in motor, technical and tactical basketball skills, when accounting for the age of youth sport specialisation. Seventy-six college students (age: M = 20.4, SD = 1.9) were allocated according to three different paths: (i) non-structured (n = 14)...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
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更新日期:2017-09-01 00:00:00
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journal_title:Journal of sports sciences
pub_type: 杂志文章
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更新日期:2015-01-01 00:00:00
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journal_title:Journal of sports sciences
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更新日期:2014-01-01 00:00:00
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journal_title:Journal of sports sciences
pub_type: 杂志文章
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更新日期:2020-07-01 00:00:00
abstract::This study examined the relationship between multidimensional competitive state anxiety and cognitive (i.e. digit span) and motor (i.e. perceptuo-motor speed) subcomponents of performance in an experimental group of hockey players during the period leading up to an important hockey match, and also in a control group o...
journal_title:Journal of sports sciences
pub_type: 杂志文章
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更新日期:1989-01-01 00:00:00