The effect of ball impact location on racket and forearm joint angle changes for one-handed tennis backhand groundstrokes.

abstract：:We examined the effects of pre-exercise sodium bicarbonate (NaHCO3) ingestion on the slow component of oxygen uptake (VO2) kinetics in seven professional road cyclists during intense exercise. One hour after ingesting either a placebo or NaHCO3 (0.3 g x kg body mass(-1)), each cyclist (age, 25 +/- 2 years; VO2max, 74....

journal_title：Journal of sports sciences

authors： Santalla A,Pérez M,Montilla M,Vicente L,Davison R,Earnest C,Lucía A

更新日期：2003-01-01 00:00:00

abstract：:The aim of the present study was to describe the frequency, duration, and nature of repeated high-intensity exercise in Super 14 rugby union. Time-motion analysis was used during seven competition matches over the 2008 and 2009 Super 14 seasons; five players from each of four positional groups (front row forwards, bac...

journal_title：Journal of sports sciences

authors： Austin D,Gabbett T,Jenkins D

更新日期：2011-07-01 00:00:00

abstract：:Twenty specialist marathon runners and 23 specialist ultra-marathon runners underwent maximal exercise testing to determine the relative value of maximum oxygen consumption (VO2max), peak treadmill running velocity, running velocity at the lactate turnpoint, VO2 at 16 km h-1, % VO2max at 16 km h-1, and running time in...

journal_title：Journal of sports sciences

authors： Noakes TD,Myburgh KH,Schall R

更新日期：1990-04-01 00:00:00

abstract：:Muscle strength is thought to be a major factor in athletic success. However, the relationship between muscle strength and sprint performance has received little attention. The aim of this study was to examine the relationship in elite performers of isokinetic muscle strength across three lower limb joints and sprinti...

journal_title：Journal of sports sciences

authors： Dowson MN,Nevill ME,Lakomy HK,Nevill AM,Hazeldine RJ

更新日期：1998-04-01 00:00:00

abstract：:Walking is one of the preferred exercises among elderly, but could a prolonged walking increase gait variability, a risk factor for a fall in the elderly? Here we determine whether 30 min of treadmill walking increases coefficient of variation of gait in elderly. Because gait responses to exercise depend on fitness le...

journal_title：Journal of sports sciences

authors： Da Rocha ES,Kunzler MR,Bobbert MF,Duysens J,Carpes FP

更新日期：2018-06-01 00:00:00

abstract：:There is limited empirical evidence of the relationship between attributions following failure and subsequent task performance. Two studies manipulated the perceived controllability and stability of causes of initial task failure and explored the impact of these factors on perceptions of self-efficacy and follow-up pe...

journal_title：Journal of sports sciences

authors： Coffee P,Rees T,Haslam SA

更新日期：2009-09-01 00:00:00

abstract：:Ghrelin is a hormone that stimulates hunger. Intense exercise has been shown to temporarily suppress hunger after exercise. In the present study, we investigated whether post-exercise hunger suppression is mediated by reduced plasma total ghrelin concentrations. Nine men and nine women participated in the study. Their...

journal_title：Journal of sports sciences

authors： Burns SF,Broom DR,Miyashita M,Mundy C,Stensel DJ

更新日期：2007-04-01 00:00:00

abstract：:This study aims to assess fundamental movement skill (FMS) proficiency, physical self-confidence levels, and the relationship between these variables and gender differences among adolescents. Three hundred and ninety five adolescents aged 13.78 years (SD = ±1.2) from 20 schools were involved in this study. The Test of...

journal_title：Journal of sports sciences

authors： McGrane B,Belton S,Powell D,Issartel J

更新日期：2017-09-01 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 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 aim of this study was to compare equivalence and agreement of physical activity output data collected by a Research Tri-axial accelerometer (R3T) during walking and running on a treadmill versus on land. Fifty healthy volunteers, 35 males (age 21.9 +/- 1.8 years) and 15 females (age 21.6 +/- 0.7 years), underwent ...

journal_title：Journal of sports sciences

authors： Vanhelst J,Zunquin G,Theunynck D,Mikulovic J,Bui-Xuan G,Beghin L

更新日期：2009-05-01 00:00:00

abstract：:The present study aimed to provide reference values for lower-limb muscle power assessed during the incremental jump squat (JS) test in elite athletes (i.e., professional athletes competing at international level). We pooled data from all JS tests performed by elite athletes of different sports in two high-performance...

journal_title：Journal of sports sciences

authors： Valenzuela PL,McGuigan M,Sánchez-Martínez G,Torrontegi E,Vázquez-Carrión J,Montalvo Z,Abad CCC,Pereira LA,Loturco I

更新日期：2020-10-01 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：:To determine if a 36-h fast affects the central and peripheral components of VO2 during submaximal exercise and peak oxygen uptake (VO2 peak), 10 physically healthy males exercised first for 10 min at approximately 60% of their VO2 peak and then to fatigue. Their cardiovascular responses were compared with those of 10...

journal_title：Journal of sports sciences

authors： Boone WT,Boone T

更新日期：1995-08-01 00:00:00

abstract：:The aim of this study was to quantify movements of Super 12 rugby players in competition because information on elite rugby players' movements is unavailable. Players were categorized into forwards [front (n = 16) and back row (n = 15)] and backs [inside (n = 9) and outside backs (n = 7)] and their movements analysed ...

journal_title：Journal of sports sciences

authors： Duthie G,Pyne D,Hooper S

更新日期：2005-05-01 00:00:00

abstract：:Present study examined the effects of conjugated linoleic acid (CLA) supplementation on glycogen resynthesis in exercised human skeletal muscle. Twelve male participants completed a cross-over trial with CLA (3.8 g/day for 8 week) or placebo supplements by separation of 8 weeks. CLA is a mixture of trans-10 cis-12 and...

journal_title：Journal of sports sciences

authors： Tsao JP,Liao SF,Korivi M,Hou CW,Kuo CH,Wang HF,Cheng IS

更新日期：2015-01-01 00:00:00

abstract：:Indoor hockey is a highly competitive international sport, yet no research to date has investigated the key actions within this sport. As with outdoor field hockey, penalty corners represent one of the most likely situations in which goals can be scored. All 36 matches of the round-robin phase of the 2010-2011 England...

journal_title：Journal of sports sciences

authors： Vinson D,Padley S,Croad A,Jeffreys M,Brady A,James D

更新日期：2013-01-01 00:00:00

abstract：:The aim of this study was to determine the match activity and physiological demands of women's tennis during a 3-day clay-court tennis tournament. The activity profile of eight players was determined by filming each competitive match with video cameras. Metabolic-perceptual measurements--blood samples and individual r...

journal_title：Journal of sports sciences

authors： Fernandez-Fernandez J,Sanz-Rivas D,Fernandez-Garcia B,Mendez-Villanueva A

更新日期：2008-12-01 00:00:00

abstract：:We explore how expertise is obtained in the domain of rugby refereeing. The research data are qualitative and are drawn from an 18 month period working in collaboration with the Rugby Football Union Elite Referee Unit. Adopting an ethnographic mode of enquiry, the study combined long-term participant observation with ...

journal_title：Journal of sports sciences

authors： Ollis S,Macpherson A,Collins D

更新日期：2006-03-01 00:00:00

abstract：:This study examined the relationship between sit-to-stand (STS) power and physical function in adults with severe obesity. Thirty-eight adults (age: 44 ± 12 years; body mass index [BMI]: 45.2 ± 7.8 kg/m2) completed evaluations of STS power, strength and functional performance. STS power was measured with a wearable in...

journal_title：Journal of sports sciences

authors： Orange ST,Marshall P,Madden LA,Vince RV

更新日期：2019-06-01 00:00:00

abstract：:The purpose of this study was to capture the lower limb kinematics before during and after ball impact of soccer kicking by examining the influence of both sampling rate and smoothing procedures. Nine male soccer players performed maximal instep kicks and the three-dimensional leg movements were captured at 1000 Hz. A...

journal_title：Journal of sports sciences

authors： Nunome H,Lake M,Georgakis A,Stergioulas LK

更新日期：2006-01-01 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：: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 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：:The aim of this study was to explore the relationships between dimensions of social support and components of performance in tennis. A post-match performance measure was completed by 144 British tournament tennis players. Principal components analysis yielded eight components, labelled Execution of (Flexible) Plan, Lo...

journal_title：Journal of sports sciences

authors： Rees T,Ingledew DK,Hardy L

更新日期：1999-05-01 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：:We aimed to evaluate the internal consistency and factor structure of the Functional Movement Screen (FMSTM) in youth athletes and quantify differences between individual task score at different stages of maturation. FMSTM and anthropometric variables were measured in 144 youth athletes (96 female, 48 male). Biologica...

journal_title：Journal of sports sciences

authors： Wright MD,Chesterton P

更新日期：2019-06-01 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：:This series of four papers comprises a theoretical investigation into twisting somersaults. Both simple and complex mathematical models are used to provide an understanding of the mechanics of the production and removal of twist in somersaults. Various twisting techniques are evaluated and a method is developed for th...

journal_title：Journal of sports sciences

authors： Yeadon MR

更新日期：1993-06-01 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

authors： Jones JG,Cale A

更新日期：1989-01-01 00:00:00