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Journal of Sports Sciences

Michael Fuchs, Ruizhi Liu, Ivan Malagoli Lanzoni, Goran Munivrana, Gunter Straub, Sho Tamaki, Kazuto Yoshida, Hui Zhang, Martin Lames
In table tennis, many different approaches to scientific founded match analysis have been developed since the first ones in the 1960s. The aim of this paper is to give a review on some of the most acknowledged methods of match analysis in table tennis. The first chapter presents a historical overview of match analysis from all over the world. The second part reviews different approaches to match analysis in more detail, using the performance analysis classification of theoretical and practical performance analysis...
March 15, 2018: Journal of Sports Sciences
Mireia Felez-Nobrega, Charles H Hillman, Kieran P Dowd, Eva Cirera, Anna Puig-Ribera
The aim of this study was to examine relationships between activPAL™-determined sedentary behavior (SB) and physical activity (PA) with academic achievement. A total of 120 undergraduates (N = 57 female; 20.6 ± 2.3 years) participated in the study. Academic achievement was measured as the grade point average obtained from all completed courses. Participants wore on the right tight an activPAL™ for 7 days to determine total sedentary time, total number of sedentary breaks, sedentary bouts, standing time, light and moderate-to-vigorous physical activity (MVPA)...
March 13, 2018: Journal of Sports Sciences
Christopher T Brennan, David G Jenkins, Mark A Osborne, Michael Oyewale, Vincent G Kelly
This study examined the changes in running performance, maximal blood lactate concentrations and running kinematics between 85%BM anti-gravity (AG) running and normal over-ground (OG) running over an 8-week training period. Fifteen elite male developmental cricketers were assigned to either the AG or over-ground (CON) running group. The AG group (n = 7) ran twice a week on an AG treadmill and once per week over-ground. The CON group (n = 8) completed all sessions OG on grass. Both AG and OG training resulted in similar improvements in time trial and shuttle run performance...
March 11, 2018: Journal of Sports Sciences
Eero A Haapala, Niina Lintu, Aino-Maija Eloranta, Taisa Venäläinen, Anna-Maija Poikkeus, Timo Ahonen, Virpi Lindi, Timo A Lakka
We investigated the associations of cardiometabolic risk factors with academic achievement and whether motor performance, cardiorespiratory fitness, physical activity, or sedentary behaviour mediated these associations. Altogether 175 children 6-8 years-of-age participated in the study. We assessed body fat percentage (BF%), waist circumference, insulin, glucose, triglycerides, HDL cholesterol, and systolic and diastolic blood pressure, leptin, alanine aminotransferase, and gamma-glutamyltransferase (GGT)...
March 9, 2018: Journal of Sports Sciences
Martin K Erikstad, Rune Høigaard, Bjørn Tore Johansen, Ngianga-Bakwin Kandala, Tommy Haugen
Childhood sport participation is argued to be important to understand differences in self-regulation and performance level in adolescence. This study sought to investigate if football-specific activities in childhood (6-12 years of age) is related to self-regulatory skills and national under 14- and 15-team selection in Norwegian elite youth football. Data of practice histories and self-regulatory skills of 515 youth football players selected at Norwegian regional level were collected and further analysed using multilevel analyses...
March 9, 2018: Journal of Sports Sciences
Andreas Liefeith, John Kiely, Dave Collins, Jim Richards
Perhaps as a consequence of increased specialism in training and support, the focus on engendering and maintaining agility as a generic quality has diminished within many contemporary sports performance programmes. Reflecting this, we outline a rationale suggesting that such a decreased focus represents an oversight which may be detrimental to maximising the potential of performers. We present an evidence-based argument that both generic and specific elements of agility performance should be consistently emphasised within long-term performance-training programmes...
March 9, 2018: Journal of Sports Sciences
António M Antunes, Duarte L Freitas, José Maia, Donald Hedeker, Élvio R Gouveia, Martine Thomis, Johan Lefevre, Lisa M Barnett
The first aim of this study was to investigate the relationship between motor performance and body fatness among 3- to 5-year-old children. The second aim was to assess whether this relationship works similarly for boys and girls. We also investigated whether socioeconomic status (SES) and geographical area when children are aged 3 years old predicts the motor performance of 4 and 5-yr-old children. Motor performance was assessed through the Preschool Test Battery, while body fatness was estimated through body mass index (BMI)...
March 9, 2018: Journal of Sports Sciences
Arne Güllich
Elite track and field athletes with greater and lesser multi-year performance improvement were compared regarding their developmental sport-specific and non-specific, organised (coach-led) and non-organised (peer-led) sporting activities. Athlete pairs were matched on gender, discipline and baseline performance in competitions (at 13/19 years). Their unequal subsequent performance development during junior (13-17 years; n = 138) and senior (19-23+ years; n = 80) age ranges defined "strong responders" and "weak responders"...
March 9, 2018: Journal of Sports Sciences
Scott E Crouter, Jennifer Flynn Oody, David R Bassett
This study developed and validated a vector magnitude (VM) two-regression model (2RM) for use with an ankle-worn ActiGraph accelerometer. For model development, 181 youth (mean ± SD; age, 12.0 ± 1.5 yr) completed 30 min of supine rest and 2-7 structured activities. For cross-validation, 42 youth (age, 12.6 ± 0.8 yr) completed approximately 2 hr of unstructured physical activity (PA). PA data were collected using an ActiGraph accelerometer, (non-dominant ankle) and the VM was expressed as counts/5-s...
March 8, 2018: Journal of Sports Sciences
Torstein E Dæhlin, Tron Krosshaug, Loren Z F Chiu
The purpose of this research was to investigate how lower extremity work was distributed during the pull of cleans performed lifting the barbell to the minimum height required to receive it in a full squat (minimal height clean); or with maximum effort to elevate the barbell as high as possible and receiving it in either a full (maximal effort clean) or partial (power clean) squat. Eight weightlifters screened for proficient technique performed these clean variations at 80% of one repetition maximum. Work performed on the barbell and by the lower extremity net joint moments (NJM) was computed from marker trajectories and ground reaction forces...
March 8, 2018: Journal of Sports Sciences
Philip E Kearney, Philip R Hayes, Alan Nevill
The relative age effect (RAE) is a common phenomenon in youth sport, whereby children born early in the selection year are more likely to experience success and to sustain participation. There is a lack of research investigating variables which influence RAEs within track and field athletics. Such information is vital to guide policies in relation to competition structure, youth development squads and coach education. A database of competition results was analysed to determine the extent to which RAEs were present in track and field athletics in the United Kingdom...
March 7, 2018: Journal of Sports Sciences
Sarah Mc Fie, Shameemah Abrahams, Jon Patricios, Jason Suter, Michael Posthumus, Alison V September
The objective was to investigate the relationship between IL-1B rs16944, IL-6 rs1800795, and CASP8 rs3834129 genetic polymorphisms and concussion severity. Rugby players from high school, senior amateur, and professional teams completed a concussion severity questionnaire and donated a DNA sample. Participants (n = 163) were split into symptom severity groups around the median number and duration of symptoms. The frequency of participants with high symptom counts (more than five symptoms) increased across the IL-1B (C/C: 35%; C/T: 51%; T/T: 56%; P = 0...
March 6, 2018: Journal of Sports Sciences
Josu Gomez-Ezeiza, Jon Torres-Unda, Nicholas Tam, Jon Irazusta, Cristina Granados, Jordan Santos-Concejero
AIM: The aim of this study was to determine the relationships between biomechanical parameters of the gait cycle and race walking economy in world-class Olympic race walkers. METHODS: Twenty-One world-class race walkers possessing the Olympic qualifying standard participated in this study. Participants completed an incremental race walking test starting at 10 km·h-1 , where race walking economy (ml·kg-1 ·km-1 ) and spatiotemporal gait variables were analysed at different speeds...
March 6, 2018: Journal of Sports Sciences
Sarah L Carter, Rebekha Duncan, Andries L Weidemann, Luke S Hopper
Turnout is a central element of classical ballet which involves sustained external rotation of the lower limbs during dance movements. Lower leg and foot compensation mechanisms which are often used to increase turnout have been attributed to the high incidence of lower limb injury in dancers. Evaluation of dancers' leg posture is needed to provide insight into the lower limb kinematic strategies used to achieve turnout. The primary purpose of this study was to use 3D kinematic analyses to determine the lower leg and foot compensations that are incorporated by female university dancers to accentuate their turnout...
March 2, 2018: Journal of Sports Sciences
Leo Ng, Simon M Rosalie, Dorianne Sherry, Wei Bing Loh, Andreas M Sjurseth, Shrikant Iyengar, Catherine Y Wild
Research has revealed that field hockey drag flickers have greater odds of hip and lumbar injuries compared to non-drag flickers (DF). This study aimed to compare the biomechanics of a field hockey hit and a specialised field hockey drag flick. Eighteen male and seven female specialised hockey DF performed a hit and a drag flick in a motion analysis laboratory with an 18-camera three-dimensional motion analysis system and a calibrated multichannel force platform to examine differences in lower limb and lumbar kinematics and kinetics...
March 1, 2018: Journal of Sports Sciences
Benjamin F Mentiplay, Ksaniel Hasanki, Luke G Perraton, Yong-Hao Pua, Paula C Charlton, Ross A Clark
The Microsoft Xbox One Kinect™ (Kinect V2) contains a depth camera that can be used to manually identify anatomical landmark positions in three-dimensions independent of the standard skeletal tracking, and therefore has potential for low-cost, time-efficient three-dimensional movement analysis (3DMA). This study examined inter-session reliability and concurrent validity of the Kinect V2 for the assessment of coronal and sagittal plane kinematics for the trunk, hip and knee during single leg squats (SLS) and drop vertical jumps (DVJ)...
March 1, 2018: Journal of Sports Sciences
Courtney Sullivan, Thomas Kempton, Patrick Ward, Aaron J Coutts
This study examined the association between individual and team characteristics and the probability of being offered a second contract in professional Australian Football. Contract status was obtained from the AFL for players who were drafted in the AFL National Draft between 1999 and 2013 (n = 999). Individual player characteristics were retrieved from the AFL while variables relating to performance were accessed online via Champion Data®. A binary logistic regression examined the influence of each characteristic on the probability of a professional Australian Football player receiving a second contract...
February 27, 2018: Journal of Sports Sciences
Craig Tears, Paul Chesterton, Mark Wijnbergen
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 encompassing three years before and after the introduction of the EPPP. The findings revealed a most likely moderate increase in total exposure per player per season when the post-EPPP football exposure (640...
February 24, 2018: Journal of Sports Sciences
Urtats Etxegarai, Ainhoa Insunza, Jon Larruskain, Jordan Santos-Concejero, Susana M Gil, Eva Portillo, Jon Irazusta
We investigated whether heart rate (HR)-derived parameters are accurate performance predictors in endurance recreational runners. One hundred thirty recreational athletes completed an incremental running test (4´running + 1´rest). After each stage, we recorded HR, % of maximum HR (%HRmax), and blood lactate. We also assessed HR after each recovery period, and calculated lactate and HR recovery thresholds and HR deflection point. We tested these parameters for associations with running performance, as measured by peak treadmill speed (PTS) and personal best International Association of Athletics Federations (IAAF) score...
February 23, 2018: Journal of Sports Sciences
Stephan van der Zwaard, Guido Weide, Koen Levels, Michelle R I Eikelboom, Dionne A Noordhof, Mathijs J Hofmijster, Willem J van der Laarse, Jos J de Koning, Cornelis J de Ruiter, Richard T Jaspers
Rowers need to combine high sprint and endurance capacities. Muscle morphology largely explains muscle power generating capacity, however, little is known on how muscle morphology relates to rowing performance measures. The aim was to determine how muscle morphology of the vastus lateralis relates to rowing ergometer performance, sprint and endurance capacity of Olympic rowers. Eighteen rowers (12♂, 6♀, who competed at 2016 Olympics) performed an incremental rowing test to obtain maximal oxygen consumption, reflecting endurance capacity...
February 23, 2018: Journal of Sports Sciences
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