Concurrent validity and reliability of an iPhone app for the measurement of ankle dorsiflexion and inter-limb asymmetries.

abstract：:Heart rate (HR), when combined with accelerometry, can dramatically improve estimates of energy expenditure and sleep. Advancements in technology, via the development and introduction of small, low-cost photoplethysmography devices embedded within wrist-worn consumer wearables, have made the collection of heart rate (...

journal_title：Journal of sports sciences

authors： Zhang Y,Weaver RG,Armstrong B,Burkart S,Zhang S,Beets MW

更新日期：2020-09-01 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：:Organisational stressors are associated with positive and negative outcomes in extant literature; however, little is known about which demands predict which outcomes. Extant theory and literature also suggests that coping style may influence an individual's resilience or vulnerability to stressors and, subsequently, t...

journal_title：Journal of sports sciences

authors： Arnold R,Fletcher D,Daniels K

更新日期：2017-04-01 00:00:00

abstract：:Many of the factors identified as influencing the home advantage have an underlying social basis, presumably through the influence exerted by the home crowd. Beliefs in the home advantage and the causes of that advantage also have a social basis: sports coverage and fan discourse focus on some aspects of the phenomeno...

journal_title：Journal of sports sciences

authors： Smith DR

更新日期：2005-04-01 00:00:00

abstract：:The aim of this study was to identify the effects of adding spatial references during football small-sided games in youth players' tactical and physical performance. Twelve under-15 players performed a Gk+ 6v6+ Gk game under two playing conditions: (i) without spatial references (CONTROL condition); (ii) with spatial ...

journal_title：Journal of sports sciences

authors： Coutinho D,Gonçalves B,Travassos B,Abade E,Wong DP,Sampaio J

更新日期：2019-04-01 00:00:00

abstract：:Assessments of maximal intensity exercise which determine peak power output on friction-baked cycle ergometers have fallen into two categories: correction procedures which account for changes in momentum of the ergometer's flywheel and optimization procedures which attempt to satisfy muscle force-velocity relationship...

journal_title：Journal of sports sciences

authors： Winter EM,Brown D,Roberts NK,Brookes FB,Swaine IL

更新日期：1996-12-01 00:00:00

abstract：:At the turn of the millennium, a review paper was published in this journal on talent identification and development in soccer (Williams & Reilly, 2000). In the current paper, we assess progress made in this field over the last twenty years relative to the areas for future research highlighted in the original review. ...

journal_title：Journal of sports sciences

authors： Williams AM,Ford PR,Drust B

更新日期：2020-01-01 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：: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 purpose of the study was to examine the health effects of 8 weeks of recreational badminton in untrained women. Participants were matched for maximal oxygen uptake (V̇O2max) and body fat percentage and assigned to either a badminton (n = 14), running (n = 14) or control group (n = 8). Assessments were conducted pr...

journal_title：Journal of sports sciences

authors： Patterson S,Pattison J,Legg H,Gibson AM,Brown N

更新日期：2017-06-01 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：: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：: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

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：:Investigations in the 1990s evaluated the influence of breathing assemblies on respiratory variables at rest and during exercise; however, research on new models of breathing assemblies is lacking. This study compared metabolic gas analysis data from a mouthpiece with a noseclip (MOUTH) and a face mask (MASK). Volunte...

journal_title：Journal of sports sciences

authors： Wagner DR,Clark NW

更新日期：2016-01-01 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：:Although it has been generally assumed that the risk of decompression sickness is virtually zero during a single breath-hold dive in humans, repeated dives may result in a cumulative increase in the tissue and blood nitrogen tension. Many species of marine mammals perform extensive foraging bouts with deep and long di...

journal_title：Journal of sports sciences

authors： Lemaitre F,Fahlman A,Gardette B,Kohshi K

更新日期：2009-12-01 00:00:00

abstract：:Drag is the resistant force that opposes a swimmer displacing through water and significantly affects swimming performance. Drag experienced during active swimming is called active drag (Da), and its direct determination is still controversial. By contrast, drag experienced while gliding in a stable streamlined body p...

journal_title：Journal of sports sciences

authors： Scurati R,Gatta G,Michielon G,Cortesi M

更新日期：2019-05-01 00:00:00

abstract：:To determine the effect of circadian rhythm on neuromuscular responses and kinematics related to physical tennis performance, after a standardised warm-up, 13 highly competitive male tennis players were tested twice for serve velocity/accuracy (SVA), countermovement vertical jump (CMJ), isometric handgrip strength (IS...

journal_title：Journal of sports sciences

authors： López-Samanes Á,Moreno-Pérez D,Maté-Muñoz JL,Domínguez R,Pallarés JG,Mora-Rodriguez R,Ortega JF

更新日期：2017-11-01 00:00:00

abstract：:Using a randomised cross-over design, free-living lunch intake and subjective appetite were examined in 10 children (9.8 ± 0.6 years) following high-intensity interval training (HIIT) versus a control sedentary (SED) period, within a school setting. The 22-min HIIT took place during a regular PE lesson and consisted o...

journal_title：Journal of sports sciences

authors： Morris A,Cramb R,Dodd-Reynolds CJ

更新日期：2018-02-01 00:00:00

abstract：:This study examined the validity of the Actical accelerometer step count and energy expenditure (EE) functions in healthy young adults. Forty-three participants participated in study 1. Actical step counts were compared to actual steps taken during a 200 m walk around an indoor track at self-selected pace and during t...

journal_title：Journal of sports sciences

authors： Johnson M,Meltz K,Hart K,Schmudlach M,Clarkson L,Borman K

更新日期：2015-01-01 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 study examined the "micro-structure" of football practice and the "macro-structure" of participation history of female professional football players. Participants were 29 German 1st league (Bundesliga) players, 14 of whom played on the senior national team (Olympic Champion in 2016). A questionnaire recorded the p...

journal_title：Journal of sports sciences

authors： Güllich A

更新日期：2019-06-01 00:00:00

abstract：:Concerns about the value of physical testing and apparently declining test performance in junior basketball players prompted this retrospective study of trends in anthropometric and fitness test scores related to recruitment age and recruitment year. The participants were 1011 females and 1087 males entering Basketbal...

journal_title：Journal of sports sciences

authors： Drinkwater EJ,Hopkins WG,McKenna MJ,Hunt PH,Pyne DB

更新日期：2007-06-01 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：:A plausible explanation for the ancient long jump records from Greek antiquity is sought on the basis of pictorial and written sources, and corroborated with practical tests. Ancient sources report that athletes jumped more than 15 m with weights in their hands, which enabled them to jump further than without these we...

journal_title：Journal of sports sciences

authors： Lenoir M,De Clercq D,Laporte W

更新日期：2005-10-01 00:00:00

abstract：:The aims of this study were to examine the test-retest reliability and construct validity of the flywheel (FW)-squat test. Twenty male amateur team sports athletes (mean±SD: age 23±3 years) completed one familiarization session and two testing sessions including: FW-squat test with an inertial load of 0.061 kg.m2, sta...

journal_title：Journal of sports sciences

authors： Beato M,Fleming A,Coates A,Dello Iacono A

更新日期：2020-10-06 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：:This study involved a systematic video analysis of 16 anterior cruciate ligament (ACL) injuries sustained by elite-level netball players during televised games in order to describe the game situation, the movement patterns involved, the player's behaviour, and a potential injury mechanism. Eight of the ACL injuries we...

journal_title：Journal of sports sciences

authors： Stuelcken MC,Mellifont DB,Gorman AD,Sayers MG

更新日期：2016-08-01 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