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https://www.readbyqxmd.com/read/29135636/track-and-field-throwing-sports-injuries-and-prevention
#1
Adele Meron, Deborah Saint-Phard
Throwing events in track and field are among the oldest sporting events in recorded history and include shot put, discus, hammer, and javelin. All throwing athletes use the kinetic chain to transfer energy from the lower extremities, through the pelvis, trunk, shoulder, arm, wrist, hand, and finally into the implement to generate maximum force. Throughout this sequential activation, mobilization, and stabilization of body segments, there is opportunity for breakdown in the chain, which can lead to injury. This review describes the biomechanics and kinetic chain components of each event and highlights injuries common among all throwers as well as injuries unique to each event...
November 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/29063423/examining-the-response-programming-function-of-the-quiet-eye-do-tougher-shots-need-a-quieter-eye
#2
Rosanna Walters-Symons, Mark Wilson, Andre Klostermann, Samuel Vine
Support for the proposition that the Quiet Eye (QE) duration reflects a period of response programming (including task parameterisation) has come from research showing that an increase in task difficulty is associated with increases in QE duration. Here, we build on previous research by manipulating three elements of task difficulty that correspond with different parameters of golf-putting performance; force production, impact quality and target line. Longer QE durations were found for more complex iterations of the task and furthermore, more sensitive analyses of the QE duration suggest that the early QE proportion (prior to movement initiation) is closely related to force production and impact quality...
October 23, 2017: Cognitive Processing
https://www.readbyqxmd.com/read/29031094/risk-assessment-of-dietary-lead-exposure-among-first-nations-people-living-on-reserve-in-ontario-canada-using-a-total-diet-study-and-a-probabilistic-approach
#3
Amanda K Juric, Malek Batal, Will David, Donald Sharp, Harold Schwartz, Amy Ing, Karen Fediuk, Andrew Black, Constantine Tikhonov, Hing Man Chan, Laurie Chan
Indigenous peoples have elevated risk of lead (Pb) exposure as hunted traditional food can be contaminated with lead-containing ammunition. Recent scientific consensus states that there is no threshold level for Pb exposure. The objective of this study was to estimate dietary exposure to Pb among First Nations living on-reserve in the province of Ontario, Canada. A total diet study was constructed based on a 24-h recall and Pb concentrations for traditional foods from the First Nations Food, Nutrition, and Environment Study (FNFNES) and Pb concentrations in market foods from Health Canada...
October 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29026261/prevention-of-noise-induced-hearing-loss-from-recreational-firearms
#4
REVIEW
Deanna K Meinke, Donald S Finan, Gregory A Flamme, William J Murphy, Michael Stewart, James E Lankford, Stephen Tasko
In the United States and other parts of the world, recreational firearm shooting is a popular sport that puts the hearing of the shooter at risk. Peak sound pressure levels (SPLs) from firearms range from ∼140 to 175 dB. The majority of recreational firearms (excluding small-caliber 0.17 and 0.22 rifles and air rifles) generate between 150 and 165 dB peak SPLs. High-intensity impulse sounds will permanently damage delicate cochlear structures, and thus individuals who shoot firearms are at a higher risk of bilateral, high-frequency, noise-induced hearing loss (NIHL) than peer groups who do not shoot...
November 2017: Seminars in Hearing
https://www.readbyqxmd.com/read/28980546/-the-possibility-of-using-the-synthetic-compound-for-the-purpose-of-modeling-of-the-human-soft-tissues-in-connection-with-the-evaluation-of-gunshot-damages
#5
I V Latyshov, V A Vasil'ev, I V Zaporotskova, T A Ermakova
The necessity of using a simulator of human soft tissues for the purpose of criminalistic and forensic medical expertises is dictated by the requirements put forward by the expert practice. The objective of the present study was to develop a synthetic simulator of the human soft tissues (compound) to ensure reliability of comparative criminalistics and forensic medical studies for the evaluation of gunshot injuries. The synthetic compound was prepared by mixing up the petroleum and/or synthetic oil with a polymeric thickening agent...
2017: Sudebno-meditsinskaia Ekspertiza
https://www.readbyqxmd.com/read/28858057/effects-of-six-weeks-sprint-strength-and-agility-training-on-body-composition-cardiovascular-and-physiological-parameters-of-male-field-hockey-players
#6
Hanjabam Barun Sharma, Jyotsna Kailashiya
Optimal physiological and cardiovascular characteristics are essential for optimal physical performance. Different types of training regimes affect these characteristics and lead to trainee's adaptation and changes in relevant parameters. In present interventional study we have evaluated effects of six weeks sprint-strength & agility training on such parameters. Twenty four young Indian national hockey players volunteered for this study. BW(weight), BMI, BF (%body fat), LBM (lean body mass), rHR (resting heart rate), rBP (blood pressure), rDP (double-product), P/power (using Running-based Anaerobic Sprint Test), VJ (vertical jump), SP (seated shot-put test), BS (ball-hitting speed), Tm (505-agility test) & VO2max were measured, and changes (d) after specified training regime were studied...
August 26, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28734270/a-case-study-of-an-unknown-mass-grave-hostages-killed-70-years-ago-by-a-nazi-firing-squad-identified-thanks-to-genetics
#7
Andrzej Ossowski, Marta Diepenbroek, Marcin Zwolski, Adam Falis, Maria Wróbel, Milena Bykowska-Witowska, Grażyna Zielińska, Maria Szargut, Tomasz Kupiec
Almost 6 million people died in Poland during the Nazi occupation and about 570 thousand during the Soviet occupation. But the end of the war was not the end of the trauma. Historians estimate that at least 30 thousand people were killed during the Stalinist regime in Poland. In 2012 the Institute of National Remembrance started to search for hidden burials of victims of communism. Many exhumations were carried out under the project. One of them took place in Białystok, eastern Poland. According to information gathered by local historians, a detention centre in the heart of city was the place of secret burials of victims of the communist regime...
September 2017: Forensic Science International
https://www.readbyqxmd.com/read/28714821/leaving-the-lecture-behind-putting-pubmed-instruction-into-the-hands-of-the-students
#8
Rose L Turner, Andrea M Ketchum, Melissa A Ratajeski, Charles B Wessel
This column describes the development of a one-shot PubMed instruction class for medical students at a health sciences library. Background information on the objective is presented and discussed in the context of educational practice literature. The new course design centers on a guided group method of instruction in order to integrate more active learning. Surveyed students reported that the method was an effective way to learn how to search PubMed and that they preferred it to a traditional lecture. Pros and cons of the method are offered for other health sciences libraries interested in presenting PubMed instruction in a similar manner...
July 2017: Medical Reference Services Quarterly
https://www.readbyqxmd.com/read/28632065/muscle-activation-sequencing-of-leg-muscles-during-linear-glide-shot-putting
#9
Róisín M Howard, Richard Conway, Andrew J Harrison
In the shot put, the athlete's muscles are responsible for generating the impulses to move the athlete and project the shot into the air. Information on phasic muscle activity is lacking for the glide shot put event and therefore important technical information for coaches is not currently available. This study provides an electromyography (EMG) analysis of the muscle activity of the legs during shot put. Fifteen right-handed Irish national level shot putters performed six maximum effort throws using the glide shot put technique...
November 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28486339/acute-effect-of-upper-and-lower-body-postactivation-exercises-on-shot-put-performance
#10
Eleni I Kontoy, Fani Berberidou, Theophilos C Pilianidis, Nikolaos I Mantzouranis, Spyridon K Methenitis
The purpose of the present study was to investigate the effect of different types of upper and lower' extremities exercises on acute increase of shot put performance, in moderate experienced throwers. Eight (n=8) males and nine (n=9) female throwers participated in the present study. Their bench press and squat maximum strength were measured while their shot put performance from power position was evaluated before and after four interventions: [1] plyometric push-ups (Plyo), [2] 6s isometric push-ups (Iso), [3] 3 countermovement jumps (CMJ) and [4] 10 reps...
May 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28149401/transfer-of-mechanical-energy-during-the-shot-put
#11
Michalina Błażkiewicz, Barbara Łysoń, Adam Chmielewski, Andrzej Wit
The aim of this study was to analyse transfer of mechanical energy between body segments during the glide shot put. A group of eight elite throwers from the Polish National Team was analysed in the study. Motion analysis of each throw was recorded using an optoelectronic Vicon system composed of nine infrared camcorders and Kistler force plates. The power and energy were computed for the phase of final acceleration of the glide shot put. The data were normalized with respect to time using the algorithm of the fifth order spline and their values were interpolated with respect to the percentage of total time, assuming that the time of the final weight acceleration movement was different for each putter...
September 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/27957824/physical-fitness-level-affects-perception-of-chronic-stress-in-military-trainees
#12
Carolin Tuch, Thomas Teubel, Roberto La Marca, Lilian Roos, Hubert Annen, Thomas Wyss
This study investigated whether physical fitness affects the perception of chronic stress in military trainees while controlling for established factors influencing stress perception. The sample consisted of 273 men (20.23 ± 1.12 years, 73.56 ± 10.52 kg, 1.78 ± 0.06 m). Physical fitness was measured by progressive endurance run (maximum oxygen uptake; VO2 max), standing long jump, seated shot put, trunk muscle strength, and one leg standing test. Perceived stress was measured using the Perceived Stress Questionnaire in Weeks 1 and 11 of basic military training (BMT)...
December 13, 2016: Stress and Health: Journal of the International Society for the Investigation of Stress
https://www.readbyqxmd.com/read/27928201/sport-education-and-direct-instruction-units-comparison-of-student-knowledge-development-in-athletics
#13
José Pereira, Rui Araújo, Cláudio Farias, Cristiana Bessa, Isabel Mesquita
This study conducted a comparative analysis of students' knowledge development on athletics in Sport Education and in a Direct Instruction unit taking into account sex and initial skill level. The participants were an experienced Physical Education teacher and two sixth-grade classes totaling 47 students (25 boys and 22 girls). Each class was randomly placed in either Sport Education or Direct Instruction classes and participated in 20, 45-minutes lessons focused on shot put, hurdles and triple jump. Knowledge on athletics was assessed through a 25-items written and video-based test...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27918675/biomechanics-in-paralympics-implications-for-performance
#14
Floor Morriën, Matthew J D Taylor, Florentina J Hettinga
PURPOSE: To provide an overview of biomechanical studies in Paralympic research and their relevance for performance in Paralympic sports. METHODS: Search terms ' Paralympic Biomechanics', 'Paralympic Sport Performance', 'Paralympic Athlete Performance', and Paralympic Athlete' were entered into the electronic database PubMed. RESULTS: Thirty-four studies were included. Biomechanical studies in Paralympics mainly contributed to performance enhancement by technical optimization (n=32) and/or injury prevention (n=6)...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27916658/referenceless-one-dimensional-nyquist-ghost-correction-in-multicoil-single-shot-spatiotemporally-encoded-mri
#15
Ying Chen, Yupeng Liao, Lisha Yuan, Hui Liu, Seong Dae Yun, Nadim Joni Shah, Zhong Chen, Jianhui Zhong
Single-shot spatiotemporally encoded (SPEN) MRI is a novel fast imaging method capable of retaining the time efficiency of single-shot echo planar imaging (EPI) but with distortion artifacts significantly reduced. Akin to EPI, the phase inconsistencies between mismatched even and odd echoes also result in the so-called Nyquist ghosts. However, the characteristic of the SPEN signals provides the possibility of obtaining ghost-free images directly from even and odd echoes respectively, without acquiring additional reference scans...
April 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/27886499/interacting-atomic-interferometry-for-rotation-sensing-approaching-the-heisenberg-limit
#16
Stephen Ragole, Jacob M Taylor
Atom interferometers provide exquisite measurements of the properties of noninertial frames. While atomic interactions are typically detrimental to good sensing, efforts to harness entanglement to improve sensitivity remain tantalizing. Here we explore the role of interactions in an analogy between atomic gyroscopes and SQUIDs, motivated by recent experiments realizing ring-shaped traps for ultracold atoms. We explore the one-dimensional limit of these ring systems with a moving weak barrier, such as that provided by a blue-detuned laser beam...
November 11, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27708727/masseter-muscle-activity-in-track-and-field-athletes-a-pilot-study
#17
Hideyuki Nukaga, Tomotaka Takeda, Kazunori Nakajima, Keishiro Narimatsu, Takamitsu Ozawa, Keiichi Ishigami, Kazuo Funato
Teeth clenching has been shown to improve remote muscle activity (by augmentation of the Hoffmann reflex), and joint fixation (by decreased reciprocal inhibition) in the entire body. Clenching could help maintain balance, improve systemic function, and enhance safety. Teeth clenching from a sports dentistry viewpoint was thought to be important and challenging. Therefore, it is quite important to investigate mastication muscles' activity and function during sports events for clarifying a physiological role of the mastication muscle itself and involvement of mastication muscle function in whole body movement...
2016: Open Dentistry Journal
https://www.readbyqxmd.com/read/27587130/single-pulse-x-ray-diffraction-using-polycapillary-optics-for-in-situ-dynamic-diffraction
#18
B R Maddox, M C Akin, A Teruya, D Hunt, D Hahn, J Cradick, D V Morgan
Diagnostic use of single-pulse x-ray diffraction (XRD) at pulsed power facilities can be challenging due to factors such as the high flux and brightness requirements for diffraction and the geometric constraints of experimental platforms. By necessity, the x-ray source is usually positioned very close, within a few inches of the sample. On dynamic compression platforms, this puts the x-ray source in the debris field. We coupled x-ray polycapillary optics to a single-shot needle-and-washer x-ray diode source using a laser-based alignment scheme to obtain high-quality x-ray diffraction using a single 16 ns x-ray pulse with the source >1 m from the sample...
August 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27474429/and-i-shot-her-on-war-and-the-creation-of-inequities-in-the-development-of-youths-moral-capacities
#19
REVIEW
Cecilia Wainryb, Stacia Bourne
War creates a multifaceted web of inequities that encompass most levels of the ecology of youth development. These include psychosocial inequities bearing on war-exposed youth's limited access to medical and educational services and job-training and employment opportunities, as well as some of the unique psychological sequelae of trauma exposure. In this chapter we put forth a twofold argument. First, we argue that the protracted hardships of war also create enduring psychological inequities that go beyond the well-documented psychosocial needs and psychological trauma, and encompass other aspects of youths' healthy development; these are inequities inasmuch as they represent profound alterations of the developmental pathways available to war-affected youth...
2016: Advances in Child Development and Behavior
https://www.readbyqxmd.com/read/27447374/trapping-of-li-ions-by-thfn-4-n-clusters-leading-to-oscillating-maxwell-stefan-diffusivity-in-the-molten-salt-lif-thf4
#20
Brahmananda Chakraborty, Sharif Kidwai, Lavanya M Ramaniah
A molten salt mixture of lithium fluoride and thorium fluoride (LiF-ThF4) serves as a fuel as well as a coolant in the most sophisticated molten salt reactor (MSR). Here, we report for the first time dynamic correlations, Onsager coefficients, Maxwell-Stefan (MS) diffusivities, and the concentration dependence of density and enthalpy of the molten salt mixture LiF-ThF4 at 1200 K in the composition range of 2-45% ThF4 and also at eutectic composition in the temperature range of 1123-1600 K using Green-Kubo formalism and equilibrium molecular dynamics simulations...
August 18, 2016: Journal of Physical Chemistry. B
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