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https://www.readbyqxmd.com/read/29445518/why-do-endocrine-profiles-in-elite-athletes-differ-between-sports
#1
Peter H Sönksen, Richard I G Holt, Walailuck Böhning, Nishan Guha, David A Cowan, Christiaan Bartlett, Dankmar Böhning
Background: Endocrine profiles have been measured on blood samples obtained immediately post-competition from 693 elite athletes from 15 Olympic Sports competing at National or International level; four were subsequently excluded leaving 689 for the current analysis. Methods: Body composition was measured by bioimpedance in a sub-set of 234 (146 men and 88 women) and from these data a regression model was constructed that enabled 'estimated' lean body mass and fat mass to be calculated on all athletes...
2018: Clinical Diabetes and Endocrinology
https://www.readbyqxmd.com/read/29432458/capability-and-opportunity-in-hot-shooting-performance-evidence-from-top-scoring-nba-leaders
#2
Shun-Chuan Chang
In basketball games, whenever players successfully shoot in streaks, they are expected to demonstrate heightened performance for a stretch of time. Streak shooting in basketball has been debated for more than three decades, but most studies have provided little significant statistical evidence and have labeled random subjective judgments the "hot hand fallacy." To obtain a broader perspective of the hot hand phenomenon and its accompanying influences on the court, this study uses field goal records and optical tracking data from the official NBA database for the entire 2015-2016 season to analyze top-scoring leaders' shooting performances...
2018: PloS One
https://www.readbyqxmd.com/read/29431595/wheelchair-mobility-performance-enhancement-by-changing-wheelchair-properties-what-is-the-effect-of-grip-seat-height-and-mass
#3
Rienk M A van der Slikke, Annemarie M H de Witte, Monique A M Berger, Daan J J Bregman, Dirk Jan H E J Veeger
PURPOSE: The purpose of this study was to provide insight in the effect of wheelchair settings on wheelchair mobility performance. METHODS: Twenty elite wheelchair basketball athletes of low (n=10) and high classification (n=10), were tested in a wheelchair basketball directed field test. Athletes performed the test in their own wheelchair, which was modified for five additional conditions regarding seat height (high - low), mass (central - distributed) and grip...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29431544/monitoring-training-load-and-well-being-during-the-in-season-phase-in-ncaa-division-i-men-s-basketball
#4
Daniele Conte, Nicholas Kolb, Aaron T Scanlan, Fabrizio Santolamazza
PURPOSE: this study aimed to characterize the weekly training load (TL) and well-being in college basketball players during the in-season phase. METHODS: Ten (6 guards and 4 forwards) male basketball players (age: 20.9 ± 0.9 years; stature: 195.0 ± 8.2 cm; body mass: 91.3 ± 11.3 kg) from the same Division I National Collegiate Athletic Association team were recruited to participate in this study. Individualized training and game loads were assessed using the session rating of perceived exertion (sRPE) at the end of each training and game session, while well-being status was collected before each session...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29425971/competition-stage-influences-perceived-performance-but-does-not-affect-rating-of-perceived-exertion-and-salivary-neuro-endocrine-immune-markers-in-elite-young-basketball-players
#5
Ademir Felipe Schultz de Arruda, Marcelo Saldanha Aoki, Ana Carolina Paludo, Gustavo Drago, Alexandre Moreira
This study examined the effects of competition stage on the salivary concentration of testosterone (T), cortisol (C), alpha-amylase (sAA), and IL-1ß cytokine, perceived performance (PP) and session rating of perceived exertion (session-RPE) in elite youth basketball players (age, 15.8 ± 0.8 yrs.; stature, 190.9 ± 7.9 cm; body mass, 90.0 ± 16.9 kg) from two age-categories (U16; n = 7; U17; n = 7). Two winning playoff matches (FM; playing for the championship; 1 for each age-category) and two winning regular stage matches (RM; 1 for each age category, played against opponents ranked 2nd place), were assessed in the current study...
February 6, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29420557/capillary-networks-and-follicular-marginal-zones-in-human-spleens-three-dimensional-models-based-on-immunostained-serial-sections
#6
Birte S Steiniger, Christine Ulrich, Moritz Berthold, Michael Guthe, Oleg Lobachev
We have reconstructed small parts of capillary networks in the human splenic white pulp using serial sections immunostained for CD34 alone or for CD34 and CD271. The three-dimensional (3D) models show three types of interconnected networks: a network with very few long capillaries inside the white pulp originating from central arteries, a denser network surrounding follicles plus periarterial T-cell regions and a network in the red pulp. Capillaries of the perifollicular network and the red pulp network have open ends...
2018: PloS One
https://www.readbyqxmd.com/read/29410568/comparison-of-sleep-status-among-three-japanese-national-wheelchair-basketball-teams
#7
Hirotaka Mutsuzaki, Kenji Tsunoda, Kazushi Hotta, Arito Yozu, Yukiyo Shimizu, Yasuyoshi Wadano
[Purpose] Sufficient sleep is required for maximal performance and good mood. Japan has three national wheelchair basketball teams: Top male, Top female, and Under-23 (U23) male teams. Using these team members as model, this study investigated the difference of sleep status of wheelchair basketball players by age and gender. [Subjects and Methods] There were 44 participants: 14 in the Top male team (29.5 ± 5.2 years), 18 in the Top female team (30.6 ± 9.2 years), and 12 in the U23 team (19.1 ± 2.0 years)...
January 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29401204/power-testing-in-basketball-current-practice-and-future-recommendations
#8
Neal Wen, Vincent J Dalbo, Bill Burgos, David B Pyne, Aaron T Scanlan
Numerous foundational movements performed during basketball are predicated on underlying power-related attributes, including speed, change-of-direction, and jumping. Accordingly, fitness testing batteries for basketball have incorporated an assortment of linear speed tests, change-of-direction tests, and jump tests. However, due to the wide variety of testing options it is difficult for basketball practitioners to select appropriate testing protocols for the assessment of power-related attributes. As a result, there is a need to review the relevant literature to identify game-specific, power-related attributes important in basketball and the most appropriate tests available to assess power-related attributes for basketball practitioners...
February 1, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29394512/the-end-game-mortality-outcomes-in-north-american-professional-athletes
#9
Srdjan Lemez, Nick Wattie, Joseph Baker
Comprehensive investigations into the mortality outcomes of elite athletes can assist in decoding risk factors of premature mortality and provide avenues for exploring human health through engagement in sport. As such, the purpose of this study was to comprehensively examine lifespan trends of athletes from the four major sports in North America: Major League Baseball (MLB), National Basketball Association (NBA), National Football League (NFL) and National Hockey League (NHL). We hypothesized that proportional death rates would be similar across the four sports, when standardizing the data by debut years...
February 2, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29393677/effects-of-repetitive-subconcussive-head-trauma-on-the-neuropsychological-test-performance-of-high-school-athletes-a-comparison-of-high-moderate-and-low-contact-sports
#10
William T Tsushima, Hyeong Jun Ahn, Andrea M Siu, Kara Yoshinaga, So Yung Choi, Nathan M Murata
The aim of this study was to examine the neuropsychological test results of non-concussed high school athletes playing at three different levels of contact sports. Based on the concussion risk data of 12 different sports, a High Contact group (n=2819; wrestling/martial arts, cheerleading, track and field, football), a Moderate Contact group (n=2323; softball, basketball, soccer), and a Low Contact group (n=1580; baseball, volleyball, water polo, tennis, cross-country) were formed and compared in terms of their scores on the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT)...
February 2, 2018: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/29387448/association-between-frontal-plane-knee-control-and-lower-extremity-injuries-a-prospective-study-on-young-team-sport-athletes
#11
Anu M Räisänen, Kati Pasanen, Tron Krosshaug, Tommi Vasankari, Pekka Kannus, Ari Heinonen, Urho M Kujala, Janne Avela, Jarmo Perttunen, Jari Parkkari
Background/aim: Poor frontal plane knee control can manifest as increased dynamic knee valgus during athletic tasks. The purpose of this study was to investigate the association between frontal plane knee control and the risk of acute lower extremity injuries. In addition, we wanted to study if the single-leg squat (SLS) test can be used as a screening tool to identify athletes with an increased injury risk. Methods: A total of 306 basketball and floorball players participated in the baseline SLS test and a 12-month injury registration follow-up...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29384434/the-psychomotor-vigilance-test-a-comparison-of-different-test-durations-in-elite-athletes
#12
Maddison J Jones, Ian C Dunican, Kevin Murray, Peter Peeling, Brian Dawson, Shona Halson, Joanna Miller, Peter R Eastwood
The 10-min Psychomotor Vigilance Test (PVT-10) is regarded as the gold-standard for assessing vigilant attention following sleep loss; however, other studies have investigated whether shorter versions of the test elicit similar results to the PVT-10. The present study compared the PVT-10 with 3-min (PVT-3) and 5-min (PVT-5) versions of the test in elite female basketball players. Athletes performed all three tests in the morning and evening for seven consecutive days. Response speed (mean reciprocal reaction time; mean 1/RT), number of errors and number of lapses were determined for each test and time point...
January 31, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29381719/positive-youth-development-and-observed-athlete-behavior-in-recreational-sport
#13
Matthew Vierimaa, Mark W Bruner, Jean Côté
OBJECTIVES: Competence, confidence, connection, and character are regarded as outcomes of positive youth development (PYD) in sport. However, the specific athlete behaviors associated with different PYD profiles are not well understood. Thus, the purpose of this study was to investigate the relationship between athletes' observed behavior during sport competitions and their perceptions of PYD outcomes. DESIGN: Cross-sectional study with systematic behavioral observation...
2018: PloS One
https://www.readbyqxmd.com/read/29381402/comparison-of-baseline-impact-performance-in-amateur-motocross-riders-to-football-and-basketball-athletes
#14
Natalie K Sandel, Phillip R Worts, Scott Burkhart, Luke Henry
PRIMARY OBJECTIVE: The American Motorcyclist Association requires professional riders to undergo baseline computerized neurocognitive testing (CNT) using the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) test for concussion management. It is recommended this practice be expanded to the amateur level, but limited research has explored whether baseline testing is necessary for youth when normative data is available. This study evaluates the utility of baseline testing for amateur riders by comparing their performance to those of traditional youth sports comprising normative datasets...
January 30, 2018: Brain Injury: [BI]
https://www.readbyqxmd.com/read/29376086/sport-specialization-characteristics-between-rural-and-suburban-high-school-athletes
#15
David R Bell, Eric G Post, Stephanie M Trigsted, Daniel A Schaefer, Timothy A McGuine, Andrew M Watson, M Alison Brooks
Background: Sport specialization has been associated with overuse injuries and is more common in larger high schools, which are often located in more urban/suburban settings. However, sport participation characteristics have not been compared between suburban and rural high schools. Purpose/Hypothesis: The purpose of this study was to examine the differences in sport participation characteristics between athletes at suburban and rural high schools. It was hypothesized that suburban high school students would be more likely to be highly specialized, participate in more athletic competitions per year, and play in a league outside of school...
January 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29373427/non-invasive-assessment-of-internal-and-external-player-load-implications-for-optimizing-athletic-performance
#16
Aaron D Heishman, Michael A Curtis, Ethan Saliba, Robert J Hornett, Steven K Malin, Arthur L Weltman
Few data exist that assess athlete tracking and monitoring for the development of strategies to optimize performance and reduce fatigue in elite athletes. The purpose of the present study was to assess the efficacy of external load and internal stress monitoring as assessment tools for examining a performance index of fatigue. A retrospective analysis was performed on data collected over the course of the pre-season in 10 elite male NCAA Division 1 basketball players. Internal stress was assessed using Omegawave Technology readiness scores and compared to the performance index of counter-movement jump (CMJ)...
January 24, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29360406/effect-of-hip-focused-injury-prevention-training-for-anterior-cruciate-ligament-injury-reduction-in-female-basketball-players-a-12-year-prospective-intervention-study
#17
Yorikatsu Omi, Dai Sugimoto, Setsurou Kuriyama, Tomohisa Kurihara, Kenji Miyamoto, Songjo Yun, Tatsuhiro Kawashima, Norikazu Hirose
BACKGROUND: Programs to prevent anterior cruciate ligament (ACL) injuries in female basketball players are scarce. Also, ACL injury prevention training that focuses on hip joint function has not been reported. PURPOSE: To determine the effectiveness of a hip-focused ACL injury prevention program in female basketball players. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: A prospective intervention study was conducted for 12 years...
January 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29357306/intermittent-intense-exercise-protects-against-cognitive-decline-in-a-similar-manner-to-moderate-exercise-in-chronically-stressed-mice
#18
Hyunjin Lee, Kazufumi Nagata, Sanae Nakajima, Makoto Ohno, Shigeo Ohta, Toshio Mikami
It is well known that regular low or mild exercise helps to improve and maintain cognition. On the other hand, ever thought many people prefer high-intensity exercise (e.g., running, swimming, biking, soccer, basketball, etc.) to get rid of stress or improve their health, the previous studies reported that intense exercise either impairs cognition or has no effect on cognitive function. However, we previously showed that intermittent intense exercise prevents stress-induced depressive behavior in mice in a similar manner to moderate exercise...
January 18, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29352373/sleep-interventions-designed-to-improve-athletic-performance-and-recovery-a-systematic-review-of-current-approaches
#19
REVIEW
Daniel Bonnar, Kate Bartel, Naomi Kakoschke, Christin Lang
BACKGROUND: Athletes experience various situations and conditions that can interfere with their sleep, which is crucial for optimal psychological and physiological recovery as well as subsequent performance. Conventional sleep screening and intervention approaches may not be efficacious for athletes given their lifestyle, the demands of training and travel associated with interstate/international competition. OBJECTIVES: The present systematic review aimed to summarize and evaluate sleep intervention studies targeting subsequent performance and recovery in competitive athletes...
January 20, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29350553/role-strain-part-1-experiences-of-athletic-trainers-employed-in-the-professional-sports-setting
#20
Manuel G Romero, William A Pitney, Kirk Brumels, Stephanie M Mazerolle
CONTEXT:   The demands and expectations of athletic trainers employed in professional sports settings (ATPSSs) have increased over the years. Meeting these demands and expectations may predispose the athletic trainer to workplace stress and ultimately role strain. OBJECTIVE:   To investigate the concept of role strain among ATPSSs. DESIGN:   Sequential, explanatory mixed-methods study consisting of 2 phases: (1) population role-strain survey and (2) personal interviews...
January 19, 2018: Journal of Athletic Training
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