Standard score assessment on physique and performance of Brazilian athletes in a six tiered competitive sports model.

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 main purposes of this study were to investigate the acute effects of static and dynamic lower limb stretching routines: (a) on peak torque, total external work and joint angle at peak torque of the hamstrings during maximal eccentric isokinetic leg flexion; (b) on unilateral hamstring to quadriceps (H/Q) strength ...

journal_title：Journal of sports sciences

authors： Ayala F,De Ste Croix M,Sainz De Baranda P,Santonja F

更新日期：2013-01-01 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：:Exercise and treating hyperlipidaemia with statins are two integral components of the American Heart Association guidelines to reduce cardiovascular risk in adults. Since statins can cause myalgias and myopathies, they could affect the duration or intensity of an exercise regimen. To determine the impact of statin use...

journal_title：Journal of sports sciences

authors： Terpak K,Guthrie S,Erickson S

更新日期：2015-01-01 00:00:00

abstract：:Short-term changes in the blood leucocyte count after exercise are known to be dependent on the intensity of exercise performed. The aim of the present study was to investigate the effects of the duration of high-intensity exercise on changes in the leucocyte and platelet count during the early recovery period. On sep...

journal_title：Journal of sports sciences

authors： Gleeson M,Blannin AK,Sewell DA,Cave R

更新日期：1995-04-01 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：:The aim of this study was to assess the effects of nicotinamide adenine dinucleotide hydride (NADH) on maximal oxygen uptake (VO2max), maximal anaerobic running time, and mental performance. Eight men were exposed to a supplement treatment (30 mg NADH as ENACHI tablets per day) and to a placebo treatment, each of 4 we...

journal_title：Journal of sports sciences

authors： Mero A,Raitanen R,Birkmayer J,Komi P

更新日期：2008-02-01 00:00:00

abstract：:The objective of this study was to investigate the injury incidence and patterns in elite youth football at a category 1 Premier League Academy before and after the introduction of a new development strategy, the Elite Player Performance Plan (EPPP). A prospective study was performed over six consecutive seasons encom...

journal_title：Journal of sports sciences

authors： Tears C,Chesterton P,Wijnbergen M

更新日期：2018-10-01 00:00:00

abstract：:The aims of this study were: (1) to characterize selected fitness and health attributes of two types of habitual recreational off-road vehicle riders - off-road motorcyclists and all-terrain vehicle riders; (2) to explore differences among riders in terms of vehicle type, age, and gender; and (3) to compare the fitnes...

journal_title：Journal of sports sciences

authors： Burr JF,Jamnik V,Gledhill N

更新日期：2010-11-01 00:00:00

abstract：:In this crossover study, we wished to determine if normalized inter-limb differences in strength differed from inter-limb differences in voluntary activation at 30°, 70°, and 90° of knee flexion. We also assessed the relationship between inter-limb differences in torque with the inter-limb differences in activation. T...

journal_title：Journal of sports sciences

authors： Pietrosimone BG,Park CM,Gribble PA,Pfile KR,Tevald MA

更新日期：2012-01-01 00:00:00

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：:The manifestations of fatigue, as observed by reductions in the ability to produce a given force or power, are readily apparent soon after the initiation of intense activity. Moreover, following the activity, a sustained weakness may persist for days or even weeks. The mechanisms responsible for the impairment in perf...

journal_title：Journal of sports sciences

authors： Green HJ

更新日期：1997-06-01 00:00:00

abstract：:The quadruple approach in the title refers to four different studies over a period of 3 years. The common factor in these studies is the methodology of the (Brussels) Electromyographic Signal Processing and Analysis System (ESPAS), a hardware and software EMG data acquisition system that has constantly been improved. ...

journal_title：Journal of sports sciences

authors： Clarys JP,Cabri J,Bollens E,Sleeckx R,Taeymans J,Vermeiren M,Van Reeth G,Voss G

更新日期：1990-01-01 00:00:00

abstract：:The aim of this study was to establish the effectiveness of a resistance training programme, designed to improve vertical jumping ability, on the grab, swing and rear-weighted track starts in swimming. Twenty-three female non-competitive swimmers participated (age 19.9 +/- 2.4 years; mean +/- s). The diving techniques...

journal_title：Journal of sports sciences

authors： Breed RV,Young WB

更新日期：2003-03-01 00:00:00

abstract：:Situational factors as well as individual differences are assumed to play an important role in perceptions of stress. One factor that may affect an elite athlete's perception of stress may be his or her perceived motivational climate. To examine the relative importance of dispositional and situational factors on the p...

journal_title：Journal of sports sciences

authors： Pensgaard AM,Roberts GC

更新日期：2000-03-01 00:00:00

abstract：:Collective efficacy research has begun to progress from simply trying to verify the relationship between collective efficacy and performance to examining the mechanisms through which collective efficacy impacts on performance. To test hypotheses concerning the impact of collective efficacy on group goal selection and ...

journal_title：Journal of sports sciences

authors： Greenlees I,Graydon J,Maynard I

更新日期：2000-06-01 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：:The purpose of this meta-analytic review was to examine the extent and quality of research on the post-activation potentiation acute effect of rest interval manipulation on jumping performance. This manuscript adopted the recommendations from the Preferred Reporting Items for Systematic Reviews and Meta-Analyses State...

journal_title：Journal of sports sciences

authors： Gouvêa AL,Fernandes IA,César EP,Silva WA,Gomes PS

更新日期：2013-01-01 00:00:00

abstract：:The purpose of this study was to establish normative data for regional sweat sodium concentration ([Na+]) and whole-body sweating rate in athletes. Data from 506 athletes (367 adults, 139 youth; 404 male, 102 female) were compiled from observational athlete testing for a retrospective analysis. The participants were s...

journal_title：Journal of sports sciences

authors： Baker LB,Barnes KA,Anderson ML,Passe DH,Stofan JR

更新日期：2016-01-01 00:00:00

abstract：:The training and competitive programmes of elite athletes incorporate travel schedules, often long journeys, across multiple time zones. In such cases, travel causes both transient fatigue and a malaise known as "jet-lag" that persists for some days. Jet-lag is due to the disturbance of the body's circadian rhythms: d...

journal_title：Journal of sports sciences

authors： Reilly T,Waterhouse J,Burke LM,Alonso JM,International Association of Athletics Federations.

更新日期：2007-01-01 00:00:00

abstract：:Longitudinal research provides valuable information about change and progress towards elite performance. Unfortunately, there is a lack of longitudinal research in handball. In this study, 94 youth handball players (oldest group: n = 41; age 15-17 and youngest group: n = 53; age 13-15) were followed over a three-year ...

journal_title：Journal of sports sciences

authors： Matthys SP,Vaeyens R,Fransen J,Deprez D,Pion J,Vandendriessche J,Vandorpe B,Lenoir M,Philippaerts R

更新日期：2013-01-01 00:00:00

abstract：:The relative age effect (RAE) has been highlighted extensively within literature as influencing selection and identification within sports. However, this initial bias appears to not be systemic in some talent development systems. Accordingly, we report an investigation into the initial identification, selection and co...

journal_title：Journal of sports sciences

authors： McCarthy N,Collins D,Court D

更新日期：2016-08-01 00:00:00

abstract：:Sport-specific resistance training, through limb loading, can be a complimentary training method to traditional resistance training by loading the working muscles during all phases of a specific movement. The purpose of this study was to examine the acute effects of skating with an additional load on the skate, using ...

journal_title：Journal of sports sciences

authors： Mavor MP,Hay DC,Graham RB

更新日期：2018-07-01 00:00:00

abstract：:In this study, we examined patterns of leg muscle recruitment and co-activation, and the relationship between muscle recruitment and cadence, in highly trained cyclists. Electromyographic (EMG) activity of the tibialis anterior, tibialis posterior, peroneus longus, gastrocnemius lateralis and soleus was recorded using...

journal_title：Journal of sports sciences

authors： Chapman AR,Vicenzino B,Blanch P,Knox JJ,Hodges PW

更新日期：2006-02-01 00:00:00

abstract：:Using a two-study approach, we examined a methodology for objectively depicting team performance and form in a professional rugby union side. Study 1 developed standardized indicators to examine a team's performance in a single match relative to their previous matches over a domestic season via a performance report an...

journal_title：Journal of sports sciences

authors： Jones NM,James N,Mellalieu SD

更新日期：2008-05-01 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：: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

authors： Russell AP,Le Rossignol PF,Sparrow WA

更新日期：1998-11-01 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：: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：:This study was concerned with the measurement of a selection of performance variables from competitors in the women's long jump final of the World Student Games held in Sheffield, UK in July 1991. Several performances of each of six finalists were recorded on cine-film at 100 Hz. Resulting planar kinematic data were o...

journal_title：Journal of sports sciences

authors： Lees A,Fowler N,Derby D

更新日期：1993-08-01 00:00:00