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Thorsten Tjardes, Markus Luecking
Introduction: To achieve the aim of zero preventable deaths on the battlefield a deeper understanding of uncontrolled hemorrhage from junctional or proximal extremity sources is mandatory. While tourniquet application to the extremities has drastically reduced morbidity and mortality, there is still room for improvement regarding the timing of tourniquet placement as the available evidence clearly points out a tight correlation between timing of tourniquet application and outcome. To save as many lives as possible the "point of no return" regarding the circulatory breakdown due to hemorrhage, colloquially addressed as platinum 5 min, needs to be determined...
March 14, 2018: Military Medicine
Anne A Fast, Jennifer Van Reet
Is it wrong to pretend to kick or pretend to steal? The current experiment examined whether preschoolers extend their moral principles from reality into pretense and whether this transfer depends on the proximity of the pretend world to the real world. Children are known to transfer their knowledge of object properties, causality, and problem solutions between pretend and real worlds. However, do children maintain their real-world moral reasoning in pretense? Preschoolers (N = 63) judged the acceptability of antisocial behaviors in pretend, fantastical, or non-pretend scenarios...
January 2018: Cognitive Development
Thomas Stöggl, Boye Welde, Matej Supej, Chiara Zoppirolli, Carsten G Rolland, Hans-Christer Holmberg, Barbara Pellegrini
Here, female and male elite cross-country (XC) skiers were compared on varying terrain during an official 10-km (women) and 15-km (men) Norwegian championship race. On the basis of race performance, 82 skiers were classified as fast (FS) (20 women, 20 men) or slower (SS) (21, 21) skiers. All were video recorded on flat (0°), intermediate (3.5°), uphill (7.1°) and steep uphill (11°) terrain during the race at a distance of 0.8, 1.2, 2.1 and 7.1 km from the start, respectively. All skiers employed exclusively double-poling (DP) on the flat section and, except for the male winner, exclusively diagonal stride (DIA) on the uphill sections...
March 2018: Journal of Sports Science & Medicine
Tomas Carlsson, Jenny Isberg, Johnny Nilsson, Magnus Carlsson
The purpose of this study was to investigate the influence of the task conditions on 20-m side foot-kick accuracy among Swedish first league women's soccer players. Twenty-three players performed three side foot-kick tests under different task conditions: stationary ball using match-relevant ball speed (SBRS) and maximal ball speed (SBMS) and a 5-m run with the ball from different approach angles (0°, 30°, and 60°) to a predetermined position, where passing of the ball on the move was executed using match-relevant ball speed (RBRS)...
March 2018: Journal of Sports Science & Medicine
Ryan M Hulteen, Philip J Morgan, Lisa M Barnett, David F Stodden, David R Lubans
Evidence supports a positive association between competence in fundamental movement skills (e.g., kicking, jumping) and physical activity in young people. Whilst important, fundamental movement skills do not reflect the broad diversity of skills utilized in physical activity pursuits across the lifespan. Debate surrounds the question of what are the most salient skills to be learned which facilitate physical activity participation across the lifespan. In this paper, it is proposed that the term 'fundamental movement skills' be replaced with 'foundational movement skills'...
March 9, 2018: Sports Medicine
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No abstract text is available yet for this article.
March 9, 2018: British Dental Journal
Antoine Vigouroux, Enno Oldewurtel, Lun Cui, David Bikard, Sven van Teeffelen
Over the past few years, tools that make use of the Cas9 nuclease have led to many breakthroughs, including in the control of gene expression. The catalytically dead variant of Cas9 known as dCas9 can be guided by small RNAs to block transcription of target genes, in a strategy also known as CRISPRi. Here, we reveal that the level of complementarity between the guide RNA and the target controls the rate at which RNA polymerase "kicks out" dCas9 from the target and completes transcription. We use this mechanism to precisely and robustly reduce gene expression by defined relative amounts...
March 8, 2018: Molecular Systems Biology
Luiz H P Vieira, Sérgio A Cunha, Renato Moraes, Fabio A Barbieri, Rodrigo Aquino, Lucas de P Oliveira, Martina Navarro, Bruno L S Bedo, Paulo R P Santiago
PURPOSE: The purpose of this study was to compare the kicking performance of young soccer players in the U9 to U20 age groups. METHOD: Three hundred and sixty-six Brazilian players were evaluated on an official pitch using three-dimensional kinematics to measure (300 Hz) ball velocity (Vball ), foot velocity (Vfoot ), Vball /Vfoot ratio, last stride length, and distance between the support foot and the ball. Simultaneously, a two-dimensional procedure was also conducted to compute (60 Hz) the mean radial error, bivariate variable error, and accuracy...
March 7, 2018: Research Quarterly for Exercise and Sport
Yiftach Golov, Jan Rillich, Ally Harari, Amir Ayali
Studies of mating and reproductive behavior have contributed much to our understanding of various animals' ecological success. The desert locust, Schistocerca gregaria , is an important agricultural pest. However, knowledge of locust courtship and precopulatory behavior is surprisingly limited. Here we provide a comprehensive study of the precopulatory behavior of both sexes of the desert locust in the gregarious phase, with particular emphasis on the conflict between the sexes. Detailed HD-video monitoring of courtship and mating of 20 locust pairs, in a controlled environment, enabled both qualitative and quantitative descriptions of the behavior...
2018: PeerJ
Tomas Maly, Dai Sugimoto, Jana Izovska, Frantisek Zahalka, Lucia Mala
The aim of this study was to determine the effect of muscular strength, strength asymmetries, and fatigue on the speed and accuracy of an instep kick in soccer players. We measured ball velocity (BV) and kicking accuracy (KA) in the preferred (PL) and non-preferred leg (NPL) before (PRE) and after (POST) physical load in the PL. Maximum peak muscle torque of the knee extensors and flexors in the PL and NPL as well as ipsilateral knee flexors and knee extensors ratio (H:Q ratio) for both legs were assessed. BV was significantly decreased in POST physical load (5...
March 5, 2018: International Journal of Sports Medicine
Dianne S Ward, Amber E Vaughn, Derek Hales, Anthony J Viera, Ziya Gizlice, Lori A Bateman, Anna H Grummon, Gabriela Arandia, Laura A Linnan
BACKGROUND: Low-wage workers suffer disproportionately high rates of chronic disease and are important targets for workplace health and safety interventions. Child care centers offer an ideal opportunity to reach some of the lowest paid workers, but these settings have been ignored in workplace intervention studies. METHODS: Caring and Reaching for Health (CARE) is a cluster-randomized controlled trial evaluating efficacy of a multi-level, workplace-based intervention set in child care centers that promotes physical activity and other health behaviors among staff...
February 28, 2018: Contemporary Clinical Trials
Jong Young Lee, Jong-Hwa Park, Hong Jun Jeon, Dae Young Yoon, Seoung Woo Park, Byung Moon Cho
PURPOSE: A complicated course of the femoral route for neurointervention can prevent approaching the target. Thus, we determined whether transcervical access in the hybrid angiosuite is applicable and beneficial in real practice. METHODS: From January 2014 to March 2017, this approach was used in 17 of 453 (3.75%) cases: 11 cerebral aneurysms (4 ruptured, 7 unruptured), 4 acute occlusions of the large cerebral artery, 1 proximal internal carotid artery (ICA) stenosis, and 1 direct carotid cavernous fistula (CCF)...
March 1, 2018: Neuroradiology
Jonatas Ferreira da Silva Santos, Emerson Franchini
Construct validity is a desirable characteristic in any performance test to differentiate athletes. However, no taekwondo-specific test was investigated with this purpose. The purpose of the present study was to compare female taekwondo athletes grouped in different competitive levels. Forty-two female taekwondo athletes divided in International/National (median (interquartile range); n = 21, age: 20 (18;25) years; body mass: 60 (53;72) kg; height: 164 (161;170) cm; practice time: 8 (5;13) years) and State/Regional group (median (interquartile range); n = 21; age: 18 (17;25) years; body mass: 57 (52;63) kg; height: 165 (160;172) cm; practice time: 5 (2;8) years) volunteered to participate in this study...
February 27, 2018: Journal of Strength and Conditioning Research
Franz Konstantin Fuss, Peter Düking, Yehuda Weizman
This paper provides the evidence of a sweet spot on the boot/foot as well as the method for detecting it with a wearable pressure sensitive device. This study confirmed the hypothesized existence of sweet and dead spots on a soccer boot or foot when kicking a ball. For a stationary curved kick, kicking the ball at the sweet spot maximized the probability of scoring a goal (58-86%), whereas having the impact point at the dead zone minimized the probability (11-22%). The sweet spot was found based on hypothesized favorable parameter ranges (center of pressure in x/y-directions and/or peak impact force) and the dead zone based on hypothesized unfavorable parameter ranges...
2018: Frontiers in Physiology
Matt Greig
Kicking is a fundamental skill and a primary non-contact mechanism of injury in soccer, with injury incidence increasing during the latter stages of match-play. Ten male professional soccer players completed a 90min treadmill protocol based on the velocity profile of soccer match-play. Pre-exercise, and at 15 min intervals, players completed a maximal velocity kick subjected to kinematic analysis at 200 Hz. Pre-exercise, and at the end of each half, players also completed isokinetic concentric knee extensor repetitions at 180, 300 and 60 °·s-1 ...
February 27, 2018: Journal of Applied Biomechanics
Eva Kapravelou, David Anderson, Gareth J Morgan
The use of hybrid techniques to avoid neonatal cardiopulmonary bypass in high-risk individuals is well reported in the setting of hypoplastic left heart syndrome. We describe the use of that technique as a bridging procedure in high-risk neonates with an interrupted aortic arch. We report three cases where hybrid branch pulmonary artery banding and ductal stent implantation has been successfully used to defer complete repair, allowing recovery, maturity, and weight gain. This strategy may be considered for patients deemed at high risk for primary neonatal repair...
March 2018: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
James C A Peacock, Kevin Ball
Executing any skill with efficiency is important for performance. In football kicking, conflicting and non-significant results have existed between reducing ankle plantarflexion during foot-ball contact with impact efficiency, making it unclear as to its importance as a coaching instruction. The aims of this study were to first validate a mechanical kicking machine with a non-rigid ankle, and secondly compare a rigid to a non-rigid ankle during the impact phase of football kicking. Measures of foot-ball contact for ten trials per ankle configuration were calculated from data recorded at 4000 Hz and compared...
February 20, 2018: Journal of Biomechanics
Michelle K Y Seah, Daniel M Messerschmidt
When reflecting about cell fate commitment we think of differentiation. Be it during embryonic development or in an adult stem cell niche, where cells of a higher potency specialize and cell fate decisions are taken. Under normal circumstances this process is definitive and irreversible. Cell fate commitment is achieved by the establishment of cell-type-specific transcriptional programmes, which in turn are guided, reinforced, and ultimately locked-in by epigenetic mechanisms. Yet, this plunging drift in cellular potency linked to epigenetically restricted access to genomic information is problematic for reproduction...
2018: Current Topics in Developmental Biology
Khuram Khan, Saqib Saeed, Alexius Ramcharan, Sanjiv Gray
INTRODUCTION: Traumatic brain injury (TBI) is one of the main causes of morbidity and mortality in young trauma patients with resultant multi-organ effects. Hypopituitarism following TBI can be debilitating and life threatening. TBI which causes hypopituitarism may be characterized by a single head injury, such as from a motor vehicle accident, or by chronic repetitive head trauma, as seen in combative supports including boxing, kick-boxing, and football. In the majority of cases, a diagnosis of hypopituitarism can be entirely missed resulting in severe neuro-endocrine dysfunction...
February 9, 2018: International Journal of Surgery Case Reports
Scott Sinnett, Cj Maglinti, Alan Kingstone
BACKGROUND: Grunting is pervasive in many athletic contests, and empirical evidence suggests that it may result in one exerting more physical force. It may also distract one's opponent. That grunts can distract was supported by a study showing that it led to an opponent being slower and more error prone when viewing tennis shots. An alternative explanation was that grunting masks the sound of a ball being hit. The present study provides evidence against this alternative explanation by testing the effect of grunting in a sport-mixed martial arts-where distraction, rather than masking, is the most likely mechanism...
2018: PloS One
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