Effect of stance position on kick performance in taekwondo.

abstract：:The purpose of this study was to examine the effects of calendar and skeletal age, anthropometric dimensions, training history and their interactions on vertical jumping height and horizontal overhead throwing velocity in a cross-section of 318 young male athletes (age range 9-16 years) participating in cross-country ...

journal_title：Journal of sports sciences

authors： Viitasalo JT,Rahkila P,Osterback L,Alén M

更新日期：1992-10-01 00:00:00

abstract：:The Drinkwater-Ross anthropometric fractionation of body mass (mass = sigma skeletal, residual, fat and muscle masses), lean body mass (LBM = sigma skeletal, residual and muscle masses) and fat mass (FM) were compared with the measured body mass, together with the densitometrically estimated fat-free mass (FFM) and fa...

journal_title：Journal of sports sciences

authors： Withers RT,Craig NP,Ball CT,Norton KI,Whittingham NO

更新日期：1991-10-01 00:00:00

abstract：:The International Paralympic Committee (IPC) and individual sports federations have established the need to develop evidence-based systems of classification for athletes with vision impairment (VI) that may differ depending on the visual demands of each sport. As a consequence, research has been conducted that led to ...

journal_title：Journal of sports sciences

authors： Allen PM,Mann DL,van der Linde I,Beukes EW

更新日期：2020-12-15 00:00:00

abstract：:This study examined the long-term effects of the 11+ on physical performance in adolescent male football (soccer) players. Eighty-two 14- to 16-year-old male football players (11+ = 42 players, control = 40 players) participated. Teams were randomised to control (CON) and intervention (INT) groups. INT applied the 11+...

journal_title：Journal of sports sciences

authors： Zarei M,Abbasi H,Daneshjoo A,Barghi TS,Rommers N,Faude O,Rössler R

更新日期：2018-11-01 00:00:00

abstract：:An analysis system for barbell weightlifting exercises is proposed to record reliable performance and neuromuscular responses. The system consists of surface electromyography (sEMG) synchronized with electrogoniometry and a barbell position transducer. The purpose of this study was to establish the reliability of the ...

journal_title：Journal of sports sciences

authors： Brandon R,Howatson G,Hunter A

更新日期：2011-10-01 00:00:00

abstract：:The use of high-resolution physical activity intensity spectra obtained from accelerometry can improve knowledge of associations with health and development beyond the use of traditional summary measures of intensity. The aim of the present study was to compare three different approaches for determining associations f...

journal_title：Journal of sports sciences

authors： Aadland E,Nilsen AKO,Andersen LB,Rowlands AV,Kvalheim OM

更新日期：2020-09-20 00:00:00

abstract：:Although the relative age effect has been widely observed in youth sports (Musch & Grondin, 2001), it is unclear whether it generalizes across the lifespan. The purpose of this study was to examine the relative age effect among a population of Masters athletes using archived data. Two successive studies examined the f...

journal_title：Journal of sports sciences

authors： Medic N,Starkes JL,Young BW

更新日期：2007-10-01 00:00:00

abstract：:This study aimed to investigate why futsal players decide to dribble. For this purpose, we analysed 396 trials comprising the dribbles (n = 132), passes (n = 131) or shots (n = 133), performed by 70 male futsal players. Passing and shooting angles, and interpersonal distance, including their rates of change (velocity ...

journal_title：Journal of sports sciences

authors： Corrêa UC,de Pinho ST,da Silva SL,Clavijo FA,Souza TO,Tani G

更新日期：2016-12-01 00:00:00

abstract：:System theory is classically applied to describe and to predict the effects of training load on performance. The classic models are structured by impulse-type transfer functions, nevertheless, most biological adaptations display exponential growth kinetics. The aim of this study was to propose an extension of the mode...

journal_title：Journal of sports sciences

authors： Philippe AG,Borrani F,Sanchez AM,Py G,Candau R

更新日期：2019-02-01 00:00:00

abstract：:The purpose of this study was to compare the maximal exercise performance during cycle ergometry of 34 men and 47 women. External peak power output (OPP) and optimized pedalling rate (ORPM) were calculated from data gathered during an optimization procedure performed on a friction braked cycle ergometer. In addition, ...

journal_title：Journal of sports sciences

authors： Winter EM,Brookes FB,Hamley EJ

更新日期：1991-04-01 00:00:00

abstract：:In this study, we examined (1) the relationship between self-talk and affect and (2) the nature of motivating self-talk. Ninety high-school athletes completed the Affect Grid and the Self-Talk Grid before practice and competition. Significant positive second-order partial correlations of low to moderate strength offer...

journal_title：Journal of sports sciences

authors： Hardy J,Hall CR,Alexander MR

更新日期：2001-07-01 00:00:00

abstract：:In two retroactive interference experiments, we assessed the effect of mentally imagined movement speed on subsequent motor performance. All participants performed a sequential motor action at three speeds during a baseline test and a retention test. During the retention interval of Experiment 1, the participants (n =...

journal_title：Journal of sports sciences

authors： Boschker MS,Bakker FC,Rietberg MB

更新日期：2000-08-01 00:00:00

abstract：:Anterior cruciate ligament (ACL) rupture, during ski-landing, is caused by excessive knee joint forces and kinematics, like anterior tibial translation, internal tibial rotation, and valgus rotation. It is not well understood how these forces/kinematics are directly related to ski-landing impact. In the present study,...

journal_title：Journal of sports sciences

authors： Yeow CH,Kong CY,Lee PV,Goh JC

更新日期：2011-08-01 00:00:00

abstract：:The purposes of this study were to examine the effects of varying levels of goals on increasing daily steps and the frequency of goal achievement among middle-aged adults. Ninety-six adults participated in a randomised control study. Participants were randomly assigned to five different step goal groups: (1) Easy (n =...

journal_title：Journal of sports sciences

authors： Moon DH,Yun J,McNamee J

更新日期：2016-10-01 00:00:00

abstract：:The aims of this study were to examine the effect of different environmental constraints on kinematic multi-segment coordination patterns during the service and its coordination with service time variability. Ten expert tennis players (Age: 34.1 ± 5.3) volunteered to take part in this study. Participants served 30 tim...

journal_title：Journal of sports sciences

authors： Shafizadeh M,Bonner S,Fraser J,Barnes A

更新日期：2019-05-01 00:00:00

abstract：:Computers have played an important supporting role in the development of experimental and theoretical sports biomechanics. The role of the computer now extends from data capture and data processing through to mathematical and statistical modelling and simulation and optimization. This paper seeks to demonstrate that e...

journal_title：Journal of sports sciences

authors： Lapham AC,Bartlett RM

更新日期：1995-06-01 00:00:00

abstract：:The aim of this study was to examine shock attenuation before and after completing a maximal effort graded exercise test while running on a treadmill. Ten individuals ran before and after a maximal graded exercise test with running speed controlled between conditions. Transfer functions were calculated using surface-m...

journal_title：Journal of sports sciences

authors： Mercer JA,Bates BT,Dufek JS,Hreljac A

更新日期：2003-11-01 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：:Maximal oxygen uptake VO(2max)) is considered the optimal method to assess aerobic fitness. The measurement of VO(2max), however, requires special equipment and training. Maximal exercise testing with determination of maximal power output offers a more simple approach. This study explores the relationship between [Vdo...

journal_title：Journal of sports sciences

authors： Dencker M,Thorsson O,Karlsson MK,Lindén C,Wollmer P,Andersen LB

更新日期：2008-11-01 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

authors： Kawabata M,Mallett CJ

更新日期：2012-01-01 00:00:00

abstract：:At the beginning of the twenty-first century, there are 30,000 golf courses and 55 million people who play golf worldwide. In the USA alone, the value of golf club memberships sold in the 1990s was US dollar 3.2 billion. Underpinning this significant human activity is a wide variety of people researching and applying ...

journal_title：Journal of sports sciences

authors： Farrally MR,Cochran AJ,Crews DJ,Hurdzan MJ,Price RJ,Snow JT,Thomas PR

更新日期：2003-09-01 00:00:00

abstract：:The present retrospective study intended to determine age, performance, the role of nationality and participation trends across calendar years in runners competing in "Comrades Marathon", the ultra-marathon with the longest tradition and the highest number of finishers worldwide. We analysed 235,467 finishers (40,211 ...

journal_title：Journal of sports sciences

authors： Nikolaidis PT,Knechtle B

更新日期：2019-06-01 00:00:00

abstract：:The relationships between team performance indicators and match outcome have been examined in many team sports, however are limited in Australian Rules football. Using data from the 2013 and 2014 Australian Football League (AFL) regular seasons, this study assessed the ability of commonly reported discrete team perfor...

journal_title：Journal of sports sciences

authors： Robertson S,Back N,Bartlett JD

更新日期：2016-01-01 00:00:00

abstract：:We aimed to assess the cardiovascular responses and locomotory demands of male referees during diverse elite, international, basketball matches, and to investigate the influence of moderating factors (competition sex, level and stage) on these demands. Cardiovascular and locomotory responses were monitored in 123 elit...

journal_title：Journal of sports sciences

authors： Suárez Iglesias D,Leicht AS,Pojskić H,Vaquera A

更新日期：2020-11-25 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

authors： Santos S,Mateus N,Sampaio J,Leite N

更新日期：2017-09-01 00:00:00

abstract：:The main purpose of this study was to compare the effects of resistance training (RT) performed with different training volumes on phase angle (PhA), body water components, and muscle quality (MQ) in untrained older adult women. A second purpose was to assess the relationship between PhA and MQ. Sixty-two older adult ...

journal_title：Journal of sports sciences

authors： Cunha PM,Tomeleri CM,Nascimento MAD,Nunes JP,Antunes M,Nabuco HCG,Quadros Y,Cavalcante EF,Mayhew JL,Sardinha LB,Cyrino ES

更新日期：2018-12-01 00:00:00

abstract：:The present study aimed to explore the mediating role of social factors on the associations between attachment styles and basic psychological needs satisfaction within two relational contexts. Athletes (N = 215) completed a multi-section questionnaire pertaining to attachment styles, basic needs satisfied within the c...

journal_title：Journal of sports sciences

authors： Felton L,Jowett S

更新日期：2013-01-01 00:00:00

abstract：:The spirit of sport, which encompasses intrinsic values associated with sport participation, is core to the World Anti-Doping Agency's (WADA) strategy for doping prevention. The contribution of these values to clean sport has yet to be established. In this study, athletes rated the importance of spirit of sport values...

journal_title：Journal of sports sciences

authors： Mortimer H,Whitehead J,Kavussanu M,Gürpınar B,Ring C

更新日期：2020-10-22 00:00:00

abstract：:In any situation where heat production as a result of physical exercise exceeds heat elimination from the body by radiation and convection, the body will depend on sweat secretion and evaporation for its thermoregulation. Sweat secretion will reach maximal levels at high energy expenditures in the heat but will be lim...

journal_title：Journal of sports sciences

authors： Brouns F

更新日期：1991-07-01 00:00:00

abstract：:Despite a growing body of evidence on the positive impact of sports science for golf, there is still a paucity of research investigating the "perceptions" and "practices" of high-skilled golfers. Professional Golfers' Association Assistant Professionals (future-qualified coaches; n = 430) were surveyed on their "perce...

journal_title：Journal of sports sciences

authors： Wells JET,Langdown BL

更新日期：2020-04-01 00:00:00