Physiological responses and time-motion characteristics of various small-sided soccer games in youth players.

abstract：:Sprint performance over short distances is a central component in young tennis players' development. This study aimed to examine the longitudinal development of sprint performance in young female tennis players, and to investigate differences between performance levels. Also potentially explanatory variables were inve...

journal_title：Journal of sports sciences

authors： Kramer T,Valente-Dos-Santos J,Visscher C,Coelho-E-Silva M,Huijgen BCH,Elferink-Gemser MT

更新日期：2021-02-01 00:00:00

abstract：:This study investigates the effect of running shoes' aging on mechanical and biomechanical parameters as a function of midsole materials (viscous, intermediate, elastic) and ground inclination. To this aim, heel area of the shoe (under calcaneal tuberosity) was first mechanically aged at realistic frequency and impact...

journal_title：Journal of sports sciences

authors： Chambon N,Sevrez V,Ly QH,Guéguen N,Berton E,Rao G

更新日期：2014-01-01 00:00:00

abstract：:High ground reaction forces during the front foot contact phase of the bowling action are believed to be a major contributor to the high prevalence of lumbar stress fractures in fast bowlers. This study aimed to investigate the influence of front leg technique on peak ground reaction forces during the delivery stride....

journal_title：Journal of sports sciences

authors： Worthington P,King M,Ranson C

更新日期：2013-01-01 00:00:00

abstract：:Despite an increase in anterior knee laxity (AKL) during the adolescent growth spurt in girls, it is unknown whether landing biomechanics are affected by this change. This study investigated whether pubescent girls with higher AKL displayed differences in their lower limb strength or landing biomechanics when performi...

journal_title：Journal of sports sciences

authors： Wild CY,Munro BJ,Steele JR

更新日期：2017-01-01 00:00:00

abstract：:While sport science can have significant and positive impact on coaches and athletes, there is still a general consensus that the transfer of sport science knowledge to coaching is poor. Given this apparent dilemma, this study investigated the perceptions of sport science from coaches across four different sports (foo...

journal_title：Journal of sports sciences

authors： Martindale R,Nash C

更新日期：2013-01-01 00:00:00

abstract：:In this study, we examined the visual search strategies used during observation of video and point-light display models. We also assessed the relative effectiveness of video and point-light models in facilitating the learning of task outcomes and movement patterns. Twenty-one female novice soccer players were divided ...

journal_title：Journal of sports sciences

authors： Horn RR,Williams AM,Scott MA

更新日期：2002-03-01 00:00:00

abstract：:The purpose of this study was to gather information from scientific literature related to all steps of Van Mechelen's "sequence of prevention" for injuries applied to youth and adult recreational field hockey players. A systematic review was conducted in Medline via Pubmed and in SPORTDiscus via EBSCOhost. Twenty-six ...

journal_title：Journal of sports sciences

authors： Cornelissen M,Kemler E,Verhagen E,Gouttebarge V

更新日期：2020-09-01 00:00:00

abstract：:This study aimed to investigate swimmer's use and coach prescription of recovery strategies during training and competition while examining perceived challenges, barriers, and beliefs in the importance of their effectiveness. A mixed-methods sequential explanatory design was implemented. Thirty-seven male and 45 femal...

journal_title：Journal of sports sciences

authors： Shell SJ,Slattery K,Clark B,Broatch JR,Halson S,Kellmann M,Coutts AJ

更新日期：2020-09-01 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：:The aim of this study was to evaluate the effects of sleep hygiene (SH) education on sleep quality in soccer players after a late-evening small-sided-game (SSG) training session. Twenty-nine non-professional players were recruited and allocated to either an experimental group (EG, n = 17) that received SH education, o...

journal_title：Journal of sports sciences

authors： Vitale JA,La Torre A,Banfi G,Bonato M

更新日期：2019-12-01 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

abstract：:Composite materials have given manufacturers the freedom to develop a broad range of tennis rackets, allowing them to change key parameters such as the structural stiffness, mass, and position of the balance point. The aim of this research was to determine how changing these parameters could affect ball resultant rebo...

journal_title：Journal of sports sciences

authors： Allen TB,Haake SJ,Goodwill SR

更新日期：2011-02-01 00:00:00

abstract：:The aim of this study was to investigate the physical demands of international rugby union. Five games in the 1989-90 Five Nations Championship were analysed using video-recordings of live television transmissions. When the ball was in open play, the average running pace of players central to the action ranged from 5 ...

journal_title：Journal of sports sciences

authors： McLean DA

更新日期：1992-06-01 00:00:00

abstract：:Recent research has challenged the typical pre-match and half-time (HT) interval warm-up (WU) routines currently used by professional soccer players. This study surveyed 2010/11 season WU strategies and their underpinning scientific reasoning and situational factors via an internet-based questionnaire, which was distr...

journal_title：Journal of sports sciences

authors： Towlson C,Midgley AW,Lovell R

更新日期：2013-01-01 00:00:00

abstract：:The rules of competitive boardsailing events were changed before the Atlanta Olympic Games. Pumping the sail (pulling repeatedly on the rig) is now allowed and the duration of races has been shortened. Eight members of the French national team (mean age 23+/-2.7 years) participated in this study. Their cardiac and met...

journal_title：Journal of sports sciences

authors： Guével A,Maïsetti O,Prou E,Dubois JJ,Marini JF

更新日期：1999-02-01 00:00:00

abstract：:We tested a hypothetical model that examined both the effects of implicit theories of ability on the judgement of cheating acceptability in a physical education context and the mediating role of the achievement goals defined in the social-cognitive model of achievement motivation. Data were collected from 477 middle-s...

journal_title：Journal of sports sciences

authors： Corrion K,D'Arripe-Longueville F,Chalabaev A,Schiano-Lomoriello S,Roussel P,Cury F

更新日期：2010-06-01 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

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：:Muscle injuries are frequent and represent one of the most substantial medical problems in professional football. They can have both traumatic and overuse causes with direct practical consequence due to differences in terms of the post-primary care regimen and prognosis. An accurate diagnosis is the first step towards...

journal_title：Journal of sports sciences

authors： Ueblacker P,Haensel L,Mueller-Wohlfahrt HW

更新日期：2016-12-01 00:00:00

abstract：:The aims of this study were to examine the (1) individual playing area, (2) length and width of the rectangle encompassing the individual playing area and (3) distance between the goalkeepers and their nearest team-mates during professional soccer matches and compare these to previously reported pitch sizes for small-...

journal_title：Journal of sports sciences

authors： Fradua L,Zubillaga A,Caro O,Iván Fernández-García A,Ruiz-Ruiz C,Tenga A

更新日期：2013-01-01 00:00:00

abstract：:Chronic fatigue in the athletic population is a common but difficult diagnostic challenge for the sports physician. While a degree of fatigue may be normal for any athlete during periods of high-volume training, the clinician must be able to differentiate between this physiological fatigue and more prolonged, severe f...

journal_title：Journal of sports sciences

authors： Derman W,Schwellnus MP,Lambert MI,Emms M,Sinclair-Smith C,Kirby P,Noakes TD

更新日期：1997-06-01 00:00:00

abstract：:Participant and protocol factors affect post-activation potentiation response. Performance enhancement is more consistent in highly-trained participants following multiple sets of a biomechanically similar conditioning activity. Providing optimal conditions, 6 international-level sprint cyclists executed multiple sets...

journal_title：Journal of sports sciences

authors： Munro LA,Stannard SR,Fink PW,Foskett A

更新日期：2017-07-01 00:00:00

abstract：:This study investigated psychosocial processes associated with avoidance of health- and morality-based deterrents to performance-enhancing drug (PED) use. In-depth semi-structured interviews were conducted with 64 English male bodybuilders with experience of doping. Resultant data were content analysed deductively usi...

journal_title：Journal of sports sciences

authors： Boardley ID,Grix J,Dewar AJ

更新日期：2014-01-01 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：:There is a positive association between motor competence and physical activity in child populations. Little is known about the relative variance explained in physical activity when process- versus product-oriented approaches are used for evaluating motor competence. This study aimed to examine associations between pro...

journal_title：Journal of sports sciences

authors： Hulteen RM,True L,Pfeiffer KA

更新日期：2020-02-01 00:00:00

abstract：:This study investigated the effects of two different doses of caffeine on endurance cycle time trial performance in male athletes. Using a randomised, placebo-controlled, double-blind crossover study design, sixteen well-trained and familiarised male cyclists (Mean ± s: Age = 32.6 ± 8.3 years; Body mass = 78.5 ± 6.0 k...

journal_title：Journal of sports sciences

authors： Desbrow B,Biddulph C,Devlin B,Grant GD,Anoopkumar-Dukie S,Leveritt MD

更新日期：2012-01-01 00:00:00

abstract：:Adherence is a key implementation outcome that determines the effectiveness of an intervention. This study, an observational design involving coaches and players from 33 high school basketball teams, evaluated the dimensions of adherence to a basketball-specific neuromuscular training (NMT) warm-up program in youth ba...

journal_title：Journal of sports sciences

authors： Owoeye OBA,Emery CA,Befus K,Palacios-Derflingher L,Pasanen K

更新日期：2020-10-01 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

authors： Oliver GD,Plummer H

更新日期：2011-07-01 00:00:00

abstract：:The aim of this study was to compare selected physiological variables and performance markers of soldiers from two "elite" units of the British Army. Ten soldiers from each of the two units were recruited for this study (n = 20). All participants completed three tests while carrying a 20 kg backpack load: (1) a maxima...

journal_title：Journal of sports sciences

authors： Simpson RJ,Gray SC,Florida-James GD

更新日期：2006-06-01 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