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https://www.readbyqxmd.com/read/29350099/does-shortening-the-pitch-make-junior-cricketers-bowl-better
#1
Michael J Harwood, Maurice R Yeadon, Mark A King
In order to get bounce and movement seam bowlers need to bowl the ball "into" the pitch. Standard deliveries by elite players are typically projected at around 7° below horizontal. In contrast, young players currently often need to release the ball almost horizontally in an effort to get the ball to bounce close enough to the batter. We anticipated that shortening the pitch could be a simple way to help young bowlers to release the ball at a better angle and with more consistency. Twenty county or best in club age group under 10 and under 11 seam bowlers were analysed bowling indoors on two different pitch lengths...
January 19, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29340975/epidemiology-of-injuries-in-tennis-players
#2
REVIEW
Michael C Fu, Todd S Ellenbecker, Per A Renstrom, Gary S Windler, David M Dines
PURPOSE OF REVIEW: To review the recent literature regarding the epidemiology of tennis injuries at all levels of play, and to discuss recent findings in injury surveillance by the Association of Tennis Professionals (ATP). RECENT FINDINGS: Following the release of a consensus statement in 2009 calling for standardized documentation and analysis of tennis-related injuries, multiple studies have been published describing longitudinal injury incidences at Grand Slam tournaments and the Davis Cup...
January 16, 2018: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/29339992/effects-of-passive-and-active-rest-on-physiological-responses-and-time-motion-characteristics-in-different-small-sided-soccer-games
#3
Ersan Arslan, Utku Alemdaroglu, Yusuf Koklu, Tahir Hazir, Surhat Muniroglu, Baris Karakoc
The purpose of this study was to investigate the effects of resting regimes on physiological responses and time motion characteristics between bouts during small sided games (SSGs) in young soccer players. Sixteen players (average age 16.87 ± 0.34 years; body height 176.69 ± 3.21 cm; body mass 62.40 ± 2.59 kg; training experience 3.75 ± 0.44 years) performed four bouts 2-a-side, 3-a-side and 4-a-side games with three minutes active (SSGar: Running at 70% of HRmax) and passive (SSGpr) rest between bouts at two-day intervals...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339988/impact-of-futsal-and-swimming-participation-on-bone-health-in-young-athletes
#4
André Seabra, Ricardo J Fernandes, Elisa Marques, Miguel Moura, Esther Ubago-Guisado, Enrique Hernando, Leonor Gallardo
Physical activity plays a crucial role in bone mass acquisition during childhood and adolescence, with weightbearing and high-impact sport activities being more beneficial. This study sought to evaluate the impact of different sports activities on bone mineral density and content in male Portuguese athletes. Seventy adolescent boys (aged 12-15 years) including 28 futsal players (FG), 20 swimmers (SG) and 22 non-athletic adolescents used as control subjects (CG), participated in the current study. Areal bone mineral density (aBMD) and areal bone mineral content (aBMC) were measured by dual energy x-ray absorptiometry (DEXA)...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339062/the-effect-of-humeral-tunnel-locations-on-radiographic-tunnel-changes-in-baseball-players-following-medial-ulnar-collateral-ligament-reconstruction-comparison-of-anatomic-and-nonanatomic-locations
#5
Jin-Young Park, Seok Won Chung, Jun Gyu Lee, Jae-Hyung Lee, Soo Kyung Lee, Hyun Jun Ji, Kyung-Soo Oh
BACKGROUND: There has been no study on radiologic changes after medial ulnar collateral ligament (MUCL) reconstruction and related clinical features. METHODS: Data from 39 baseball players who underwent MUCL reconstruction were collected and analyzed. The baseball players were classified into 2 groups according to the starting point of the humeral tunnel: (1) the lower tip of the medial epicondyle (group NA, n = 21) and (2) the remnant of the MUCL (group A, n = 18)...
January 12, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29337833/effects-of-plyometric-and-resistance-training-on-muscle-strength-explosiveness-and-neuromuscular-function-in-young-adolescent-soccer-players
#6
Brandon John McKinlay, Phillip Wallace, Raffy Dotan, Devon Long, Craig Tokuno, David Gabriel, Bareket Falk
This study examined the effect of 8-weeks of free-weight-resistance (RT) and plyometric (PLYO) training on maximal strength, explosiveness and jump performance compared with no added training (CON), in young male soccer players. Forty-one 11[FIGURE DASH]13-year-old soccer players were divided into three groups (RT, PLYO, CON). All participants completed isometric and dynamic (240°/s) knee extensions pre- and post-training. Peak torque (pT), peak rate of torque development (pRTD), electromechanical-delay (EMD), rate of muscle activation (Q50), m...
January 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29330163/affective-stimuli-in-behavioural-interventions-soliciting-for-health-check-up-services-and-the-service-users-socioeconomic-statuses-a-study-at-japanese-pachinko-parlours
#7
Naoki Kondo, Yoshiki Ishikawa
BACKGROUND: Socioeconomically vulnerable people are likely to have more health risks because of inadequate behaviour choices related to chronic social stresses. Brain science suggests that stress causes cognitively biased automatic decision making, preferring instant stress relief and pleasure (eg, smoking, alcohol use and drug abuse) as opposed to reflectively seeking health-maintenance services (eg, health check-ups). As such, hedonic stimuli that nudge people towards preventive actions could reduce health behaviour disparities...
January 12, 2018: Journal of Epidemiology and Community Health
https://www.readbyqxmd.com/read/29329155/ecological-validity-and-reliability-of-an-age-adapted-endurance-field-test-in-young-male-soccer-players
#8
Carlo Castagna, Peter Krustrup, Stefano D'Ottavio, Carlo Pollastro, Andrea Bernardini, Susana Cristina Araújo Póvoas
The purpose of this study was to examine the reliability and the association with relevant match activities (ecological validity) of an age-adapted field test for intermittent high-intensity endurance known as Yo-Yo intermittent recovery level 1 children test (YYIR1C) in young male soccer players. Twenty-eight young male outfield soccer players (age 11.1±0.9 years, height 142±4.4 cm, body mass 37.0±5.9 kg) with at least 2 years of experience in soccer competitions were tested twice using YYIR1C and an age-adapted competitive small-sided game (i...
January 11, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29327205/nociceptive-roles-of-trpm2-ion-channel-in-pathologic-pain
#9
REVIEW
Yongwoo Jang, Pyung Sun Cho, Young Duk Yang, Sun Wook Hwang
Pain is a protective mechanism that enables us to avoid potentially harmful environments. However, when pathologically persisted and aggravated under severely injured or inflamed conditions, pain often reduces the quality of life and thus is considered as a disease to eliminate. Inflammatory and/or neuropathic mechanisms may exaggerate interactions between damaged tissues and neural pathways for pain mediation. Similar mechanisms also promote the communication among cellular participants in synapses at spinal or higher levels, which may amplify nociceptive firing and subsequent signal transmission, deteriorating the pain sensation...
January 11, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29324577/physical-fitness-performance-of-young-professional-soccer-players-does-not-change-during-several-training-seasons-in-a-spanish-elite-reserve-team-a-club-study-1996-2013
#10
Asier Los Arcos, Javier Martins
The purpose of the study was to assess the changes in physical fitness performance in young professional soccer players during several training seasons in a Spanish elite reserve team. Physical test values (i.e. vertical jump test, straight line sprint test, and discontinuous and progressive submaximal running test) of 97 young professional soccer players that belonged for at least two consecutive seasons to the reserve team of a Spanish professional team from 1996 to 2013 were analyzed. A distinction was made between the soccer players that were promoted to the Spanish 1/2 Divisions (n = 38) (PFL) and those that were not (n = 59) (non-PFL) (until the end of the 2016/2017 season)...
January 5, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29320519/the-effect-of-small-sided-games-with-different-levels-of-opposition-on-the-tactical-behaviour-of-young-footballers-with-different-levels-of-sport-expertise
#11
Alba Práxedes, Alberto Moreno, Alexander Gil-Arias, Fernando Claver, Fernando Del Villar
To optimize players' tactical abilities, coaches need to design training sessions with representative learning tasks, such as, small-sided games. Moreover, it is necessary to adapt the complexity of the tasks to the skill level of the athletes to maximally improve their perceptual, visual and attentive abilities. The objective of this study was to analyze the effect of two teaching programs, each utilizing modified games with varied levels of opposition, on decision-making and action execution in young players with different levels of sports expertise...
2018: PloS One
https://www.readbyqxmd.com/read/29318174/sagittal-plane-hip-knee-and-ankle-biomechanics-and-the-risk-of-anterior-cruciate-ligament-injury-a-prospective-study
#12
Mari Leppänen, Kati Pasanen, Tron Krosshaug, Pekka Kannus, Tommi Vasankari, Urho M Kujala, Roald Bahr, Jarmo Perttunen, Jari Parkkari
Background: Stiff landings with less knee flexion and high vertical ground-reaction forces have been shown to be associated with an increased risk of anterior cruciate ligament (ACL) injury. The literature on the association between other sagittal plane measures and the risk of ACL injuries with a prospective study design is lacking. Purpose: To investigate the relationship between selected sagittal plane hip, knee, and ankle biomechanics and the risk of ACL injury in young female team-sport athletes...
December 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29318166/lower-limb-symmetry-comparison-of-muscular-power-between-dominant-and-nondominant-legs-in-healthy-young-adults-associated-with-single-leg-dominant-sports
#13
Alex Vaisman, Rodrigo Guiloff, Juan Rojas, Iris Delgado, David Figueroa, Rafael Calvo
Background: Achieving a symmetrical power performance (difference <15%) between lower limbs is generally recommended during sports rehabilitation. However, athletes in single-leg-dominant sports, such as professional soccer players, could develop significant asymmetry between their dominant and nondominant legs, such that symmetry does not act as a viable comparison. Purpose: To (1) compare maximal muscular power between the dominant and nondominant legs in healthy young adults, (2) evaluate the effect of a single-leg-dominant sport activity performed at the professional level, and (3) propose a parameter of normality for maximal power difference in the lower limbs of this young adult population...
December 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29299380/higher-extrinsic-and-lower-intrinsic-connectivity-in-resting-state-networks-for-professional-baduk-go-players
#14
William S Sohn, Tae Young Lee, Seoyeon Kwak, Youngwoo Bryan Yoon, Jun Soo Kwon
Introduction: Dedication and training to a profession results in a certain level of expertise. This expertise, like any other skill obtained in our lifetime, is encoded in the brain and may be reflected in our brain's connectome. This property can be observed by mapping resting state connectivity. In this study, we examine the differences in resting state functional connectivity in four major networks between professional "Baduk" (Go) players and normal subjects. Methods: Resting state fMRI scans were acquired for professional "Baduk" (Go) players and normal controls...
December 2017: Brain and Behavior
https://www.readbyqxmd.com/read/29294918/abuse-is-abuse-the-influence-of-type-of-abuse-victim-age-and-defendant-age-on-juror-decision-making
#15
Chelsea L Sheahan, Emily Pica, Joanna D Pozzulo
The purpose of the current study was to examine the role of victim age, defendant age, and type of abuse on mock juror decision making. Mock jurors ( N = 556) read a trial transcript in which a soccer coach was accused of sexual abuse or physical abuse against a player. The victim's age (child, adolescent, or young adult), the defendant's age (young, middle age, or older adult), and the type of abuse (sexual or physical) were varied. Mock jurors provided a dichotomous and continuous verdict and rated their perceptions of the victim and the defendant...
September 1, 2017: Journal of Interpersonal Violence
https://www.readbyqxmd.com/read/29259034/ablation-of-the-mammalian-lectin-galectin-8-induces-bone-defects-in-mice
#16
Yaron Vinik, Hadas Shatz-Azoulay, Sahar Hiram-Bab, Leonid Kandel, Yankel Gabet, Gurion Rivkin, Yehiel Zick
Mice overexpressing galectin-8 [gal-8 transgenic (Tg)], a secreted mammalian lectin, exhibit enhanced bone turnover and reduced bone mass, similar to cases of postmenopausal osteoporosis. Here, we show that gal-8 knockout (KO) mice have increased bone mass accrual at a young age but exhibit accelerated bone loss during adulthood. These phenotypes can be attributed to a gal-8-mediated increase in receptor activator of NF-κB ligand (RANKL) expression that promotes osteoclastogenesis, combined with direct inhibition of osteoblasts differentiation, evident by reduced bone morphogenetic protein (BMP) signaling, reduced phosphorylation of receptor regulated mothers against decapentaplegic homolog (R-SMAD) and reduced expression of osteoblasts differentiation markers osterix, osteocalcin, runt-related transcription factor 2 (RUNX2), dentin matrix acidic phosphoprotein-1 (DMP1), and alkaline phosphatase...
December 19, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29250011/importance-of-the-motivational-climate-in-goal-enjoyment-and-the-causes-of-success-in-handball-players
#17
Antonio Granero-Gallegos, Manuel Gómez-López, Nuria Rodríguez-Suárez, J Arturo Abraldes, Marianna Alesi, Antonino Bianco
The purpose of the study is to examine the effects of the motivational climate created by the coach and perceived by a group of young handball players on their goal orientations, their beliefs regarding reasons for success and their self-satisfaction. The study participants were 159 young handball players. Players were administered a battery composed of tests to measure the above-mentioned motivational constructs. Results showed that a perceived mastery-oriented motivational climate was positively related to a task-centered goal orientation, enjoyment, and a belief that success may be achieved through effort...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29246456/scavenger-receptor-a-deficiency-impairs-immune-response-of-microglia-and-astrocytes-potentiating-alzheimer-s-disease-pathophysiology
#18
Francisca Cornejo, Marianne Vruwink, Claudia Metz, Paola Muñoz, Nicole Salgado, Joaquín Poblete, María Estela Andrés, Jaime Eugenín, Rommy von Bernhardi
Late onset Alzheimer disease's (LOAD) main risk factor is aging. Although it is not well known which age-related factors are involved in its development, evidence points out to the involvement of an impaired amyloid-β (Aβ) clearance in the aged brain among possible causes. Glial cells are the main scavengers of the brain, where Scavenger Receptor class A (SR-A) emerges as a relevant player in AD because of its participation in Aβ uptake and in the modulation of glial cell inflammatory response. Here, we show that SR-A expression is reduced in the hippocampus of aged animals and APP/PS1 mice...
December 12, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29242199/organ-specific-lymphatic-vasculature-from-development-to-pathophysiology
#19
REVIEW
Tatiana V Petrova, Gou Young Koh
Recent discoveries of novel functions and diverse origins of lymphatic vessels have drastically changed our view of lymphatic vasculature. Traditionally regarded as passive conduits for fluid and immune cells, lymphatic vessels now emerge as active, tissue-specific players in major physiological and pathophysiological processes. Lymphatic vessels show remarkable plasticity and heterogeneity, reflecting their functional specialization to control the tissue microenvironment. Moreover, alternative developmental origins of lymphatic endothelial cells in some organs may contribute to the diversity of their functions in adult tissues...
December 14, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29239988/effect-of-boards-in-small-sided-street-soccer-games-on-movement-pattern-and-physiological-response-in-recreationally-active-young-men
#20
Morten B Randers, Jonathan Brix, Marie Hagman, Jens J Nielsen, Peter Krustrup
The present study investigated whether street soccer might be proposed as an alternative to recreational small-sided games on grass as a health-enhancing activity, and specifically the effects of the boards surrounding the pitch. Eleven recreationally active young males (28.4±4.2 (±SD) yrs, 19.9±4.2% body fat, 47.7±6.0 mlminkg), after familiarization, completed one to two sessions of 20x13-m 3v3 street soccer games with boards (WB) and one to two sessions without boards (WOB) in a randomized order. Movement pattern was measured using GPS and heart rate recordings, blood sampling and RPE scales were used to evaluate exercise intensity and physiological strain...
December 11, 2017: Journal of Strength and Conditioning Research
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