Ankle muscle strength influence on muscle activation during dynamic and static ankle training modalities.

abstract：:This study investigated the stability of the measurement of respiratory variables during rest, walking and running using the K4b(2) portable metabolic analyser in ten active males (age 31 ± 11 years; VO₂ peak 42.1 ± 2.6 ml · min(-1) · kg(-1)). Following a 10 min rest, participants completed three discontinuous increme...

journal_title：Journal of sports sciences

authors： Howe CC,Matzko RO,Piaser F,Pitsiladis YP,Easton C

更新日期：2014-01-01 00:00:00

abstract：:Sports coaches operate within a complex, ever-changing environment that imposes many pressures on them. Here, we address the psychological impact of these demands via a critical review of the literature pertaining to stress in sport coaches. The narrative is divided into three main sections: (1) conceptual and definit...

journal_title：Journal of sports sciences

authors： Fletcher D,Scott M

更新日期：2010-01-01 00:00:00

abstract：:We examined the effects of time of day on a cycling time trial with and without a prolonged warm-up, among cyclists who tended towards being high in "morningness". Eight male cyclists (mean +/- s: age = 24.9 +/- 3.5 years, peak power output = 319 +/- 34 W, chronotype = 39 +/- 6 units) completed a 16.1-km time trial wi...

journal_title：Journal of sports sciences

authors： Atkinson G,Todd C,Reilly T,Waterhouse J

更新日期：2005-03-01 00:00:00

abstract：:The aims of this study were to compare the physiological and anthropometric characteristics of successful mountain bikers and professional road cyclists and to re-examine the power-to-weight characteristics of internationally competitive mountain bikers. Internationally competitive cyclists (seven mountain bikers and ...

journal_title：Journal of sports sciences

authors： Lee H,Martin DT,Anson JM,Grundy D,Hahn AG

更新日期：2002-12-01 00:00:00

abstract：:Abstract This study constructed a technique effectiveness evaluation formula for table tennis players based on the relationship between the scoring rate and usage rate of techniques and established evaluation criteria through the examination of 224 matches of the world's top 35 players. It also built a competition per...

journal_title：Journal of sports sciences

authors： Zhang H,Liu W,Hu JJ,Liu RZ

更新日期：2014-01-01 00:00:00

abstract：:Deci and Ryan's causality orientations theory suggests that there are individual differences in motivational orientation towards initiating and regulating behaviour. They described three causality orientations: autonomy, control and impersonal. The aim of this paper is to describe the development and concurrent validi...

journal_title：Journal of sports sciences

authors： Rose EA,Markland D,Parfitt G

更新日期：2001-06-01 00:00:00

abstract：:The aim of this study was to examine acute physiological responses and time-motion characteristics associated with three different small-sided soccer game formats in youth players. Sixteen male soccer players aged 16.3+/-0.6 years (mean+/-s) completed three variations of a small-sided game (i.e. 2 vs. 2, 4 vs. 4, and ...

journal_title：Journal of sports sciences

authors： Hill-Haas SV,Dawson BT,Coutts AJ,Rowsell GJ

更新日期：2009-01-01 00:00:00

abstract：:The aim of this study was to examine the effect of concentric warm-up exercise on eccentrically induced changes in muscle strength, range of motion, and soreness of the elbow flexors. Ten resistance-exercise naive participants performed intermittent incremental eccentric actions (42 in total) of the elbow flexor muscl...

journal_title：Journal of sports sciences

authors： Ingham SA,van Someren KA,Howatson G

更新日期：2010-11-01 00:00:00

abstract：:The inflammatory responsive cytokine interleukin-6 (IL-6) helps regulate immune responses to exercise. Evidence suggests that increases in IL-6 are related to exercise duration and intensity. However, the moderating effect of sex and underlying mediators have received limited attention. We compared plasma IL-6 respons...

journal_title：Journal of sports sciences

authors： Edwards KM,Burns VE,Ring C,Carroll D

更新日期：2006-08-01 00:00:00

abstract：:The use of large cross-sectional norms on Brazilian children and youths aged 7 to 18 years within a six level competition plan helps to assess development status and monitor change. Non-athletic prototypes for comparative purposes are illustrated by the use of the lowest competitive level of 18 year olds to assess dif...

journal_title：Journal of sports sciences

authors： Matsudo VK,Rivet RE,Pereira MH

更新日期：1987-04-01 00:00:00

abstract：:This study addressed the paucity of evidence of whether visual anticipation can be improved in emerging experts in striking sports. Twelve emerging expert batsmen from a state cricket squad were equally randomised into intervention and control groups. They were pre-and-post tested on a video temporal occlusion test of...

journal_title：Journal of sports sciences

authors： Brenton J,Müller S,Harbaugh AG

更新日期：2019-09-01 00:00:00

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

authors： Barreira P,Robinson MA,Drust B,Nedergaard N,Raja Azidin RMF,Vanrenterghem J

更新日期：2017-09-01 00:00:00

abstract：:We examined the influence of caffeine supplementation on cognitive performance and perceptual responses in female team-game players taking low-dose monophasic oral contraceptives of the same hormonal composition. Ten females (24 ± 4 years; 59.7 ± 3.5 kg body mass; 2-6 training sessions per week) took part in a randomi...

journal_title：Journal of sports sciences

authors： Ali A,O'Donnell J,Von Hurst P,Foskett A,Holland S,Starck C,Rutherfurd-Markwick K

更新日期：2016-01-01 00:00:00

abstract：:Oudejans, Bakker, and Beek (2007) recognize several relevant aspects of offside judgements in association football in the paper by Helsen, Gilis, and Weston (2006). We agree that the existing knowledge base on offside assessment needs to be expanded for two reasons. First, from a theoretical point of view it is import...

journal_title：Journal of sports sciences

authors： Helsen W,Gilis B,Weston M

更新日期：2007-07-01 00:00:00

abstract：:We analysed stroke phases and arm and leg coordination during front crawl swimming with and without a wet suit. Twelve nationally and internationally ranked French male triathletes performed three swim trials in randomized order using the front crawl stroke with and without a wet suit. All triathletes swam at three di...

journal_title：Journal of sports sciences

authors： Hue O,Benavente H,Chollet D

更新日期：2003-12-01 00:00:00

abstract：:The effects of exercise on the core musculature have not been investigated in prepubescents. The main purpose of the present study was to determine the volume and degree of asymmetry of rectus abdominis, obliques and transversus abdominis, quadratus lumborum, iliopsoas, gluteus and paravertebralis muscles in prepubesc...

journal_title：Journal of sports sciences

authors： Sanchis-Moysi J,Idoate F,Álamo-Arce D,Calbet JA,Dorado C

更新日期：2017-04-01 00:00:00

abstract：:To examine the activity profile and physiological demands of top-class soccer refereeing, we performed computerized time-motion analyses and measured the heart rate and blood lactate concentration of 27 referees during 43 competitive matches in the two top Danish leagues. To relate match performance to physical capaci...

journal_title：Journal of sports sciences

authors： Krustrup P,Bangsbo J

更新日期：2001-11-01 00:00:00

abstract：:This study examines the association between prolonged sedentary time and breaks in sedentary time with cardiometabolic risk in 10-14-year-old children. This cross-sectional design study analysed accelerometry-determined sedentary behaviour and physical activity collected over 7 days from 111 (66 girls) UK schoolchildr...

journal_title：Journal of sports sciences

authors： Bailey DP,Charman SJ,Ploetz T,Savory LA,Kerr CJ

更新日期：2017-11-01 00:00:00

abstract：:The use of dieting, rapid weight loss, and frequent weight fluctuation among athletes competing in weight-class and leanness sports have been considered a problem for years, but the extent of the problem and the health and performance consequences have yet to be fully examined. Most studies examining these issues have...

journal_title：Journal of sports sciences

authors： Sundgot-Borgen J,Garthe I

更新日期：2011-01-01 00:00:00

abstract：:Athletes have been shown to have greater movement imagery abilities than non-athletes. However, since these differences were observed using questionnaires where participants subjectively judged the vividness of performing imagined movements, it is possible that responses could be biased by other factors such as social...

journal_title：Journal of sports sciences

authors： Madan CR,Singhal A

更新日期：2014-01-01 00:00:00

abstract：:Stand-up paddle boarding (SUP) is a rapidly growing activity where only anecdotal evidence exists for its proposed health and fitness benefits. The purpose of this study was to profile elite and recreational SUP with respect to anthropometric, physiological and musculoskeletal measurements. A total of 30 SUP participa...

journal_title：Journal of sports sciences

authors： Schram B,Hing W,Climstein M

更新日期：2016-01-01 00:00:00

abstract：:In the present study, we investigated the accuracy of offside judgements of assistant referees in the English Premier League. The moment in the match, the position and movement speed of the assistant referee, attacker and second-last defender, together with the angle of view for the assistant referee were all consider...

journal_title：Journal of sports sciences

authors： Catteeuw P,Gilis B,Wagemans J,Helsen W

更新日期：2010-03-01 00:00:00

abstract：:The presence of the relative age effect (RAE) has been widely reported; however, its underlying causes have not yet been determined. With this in mind, the present study examined if anthropometry and performance were different amongst older and younger soccer players born in the same year. Eighty-eight young soccer pl...

journal_title：Journal of sports sciences

authors： Gil SM,Badiola A,Bidaurrazaga-Letona I,Zabala-Lili J,Gravina L,Santos-Concejero J,Lekue JA,Granados C

更新日期：2014-01-01 00:00:00

abstract：:Research has suggested the need to use a person-centred approach to examine multidimensionality of motivation. Guided by self-determination theory (Deci & Ryan, 1985), the primary aim of the present study was to examine the motivational profiles in table tennis players and their composition by gender, country, trainin...

journal_title：Journal of sports sciences

authors： Chu TLA,Zhang T,Hung TM

更新日期：2018-12-01 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

authors： Nibbeling N,Daanen HA,Gerritsma RM,Hofland RM,Oudejans RR

更新日期：2012-01-01 00:00:00

abstract：:We propose a new method, based on inertial sensors, to automatically measure at high frequency the durations of the main phases of ski jumping (i.e. take-off release, take-off, and early flight). The kinematics of the ski jumping movement were recorded by four inertial sensors, attached to the thigh and shank of junio...

journal_title：Journal of sports sciences

authors： Chardonnens J,Favre J,Le Callennec B,Cuendet F,Gremion G,Aminian K

更新日期：2012-01-01 00:00:00

abstract：:We examined a theoretical model of global self-esteem that incorporated constructs from achievement goal and self-determination theories. The model hypothesized that self-determined or autonomous motives would mediate the influence of achievement goal orientation on global self-esteem. The adapted version of the Behav...

journal_title：Journal of sports sciences

authors： Hein V,Hagger MS

更新日期：2007-01-15 00:00:00

abstract：:The aim of this study was to evaluate physiological and technical attributes of prepubertal soccer players during multiple small-sided games (SSGs), and determine if SSGs can act as a talent identification tool. Sixteen highly trained U10 soccer players participated and separated into two groups of eight. Each group p...

journal_title：Journal of sports sciences

authors： Fenner JS,Iga J,Unnithan V

更新日期：2016-10-01 00:00:00

abstract：:Interest in rises in oxygen consumption (VO2) with increasing exercise intensity largely originate from the work of Hill and colleagues in the 1920s. Their studies led to a belief that cardiac output and VO2 'plateau' at increasing work rates and that muscle hypoxia leads to fatigue. Hence, it was assumed that the pri...

journal_title：Journal of sports sciences

authors： Dennis SC,Noakes TD

更新日期：1998-01-01 00:00:00

abstract：:Veteran football players above 40 years have rarely been subject to scientific investigations. This is worrisome because their number is considerable and their cardiovascular risk probably increased. Therefore, a cross-sectional study was conducted in 100 football players between 40 and 63 years of age. This included ...

journal_title：Journal of sports sciences

authors： Wegmann M,Steffen A,Pütz K,Würtz N,Such U,Faude O,Bohm P,Meyer T

更新日期：2016-01-01 00:00:00