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https://www.readbyqxmd.com/read/28742607/pitch-counts-in-youth-baseball-and-softball-a-historical-review
#1
Brian T Feeley, Jessica Schisel, Julie Agel
OBJECTIVE: Pitching injuries are getting increased attention in the mass media. Many references are made to pitch counts and the role they play in injury prevention. The original purpose of regulating the pitch count in youth baseball was to reduce injury and fatigue to pitchers. This article reviews the history and development of the pitch count limit in baseball, the effect it has had on injury, and the evidence regarding injury rates on softball windmill pitching. DATA SOURCE: Literature search through PubMed, mass media, and organizational Web sites through June 2015...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28739314/concussion-rates-in-u-s-middle-school-athletes-2015-2016-school-year
#2
Zachary Y Kerr, Nelson Cortes, Amanda M Caswell, Jatin P Ambegaonkar, Kaitlin Romm Hallsmith, A Frederick Milbert, Shane V Caswell
INTRODUCTION: Concussion incidence estimates in middle school sports settings are limited. This study examines concussion incidence in nine U.S. middle schools during the 2015-2016 school year. METHODS: Concussion data originated from nine public middle schools in Prince William County, Virginia, during the 2015-2016 school year. Certified athletic trainers collected concussion and athlete exposure (AE) data in school-sanctioned games and practices in boys' baseball, basketball, football, soccer, track, and wrestling; and girls' basketball, cheerleading, soccer, softball, track, and volleyball...
July 21, 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28734533/changes-in-pitching-mechanics-after-ulnar-collateral-ligament-reconstruction-in-major-league-baseball-pitchers
#3
Daniel A Portney, Jake M Lazaroff, Lucas T Buchler, Stephen M Gryzlo, Matthew D Saltzman
BACKGROUND: Medial ulnar collateral ligament (UCL) reconstruction is a common procedure performed on Major League Baseball pitchers. Variations in pitching mechanics before and after UCL reconstructive surgery are not well understood. METHODS: Publicly available pitch tracking data (PITCHf/x) were compared for all Major League Baseball pitchers who underwent UCL reconstruction between 2008 and 2013. Specific parameters analyzed were fastball percentage, release location, velocity, and movement of each pitch type...
August 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28730294/two-year-follow-up-study-of-subchondral-surface-irregularities-of-the-capitellum-on-ultrasonography-in-baseball-players-under-the-age-of-10-years
#4
Toshiyuki Iwame, Tetsuya Matsuura, Naoto Suzue, Shunsuke Tamaki, Kenji Yokoyama, Koichi Sairyo
OBJECTIVE: To determine whether subchondral surface irregularities of the capitellum on ultrasonography in baseball players under the age of 10 years are indicative of early osteochondritis dissecans (OCD) of the capitellum. MATERIALS AND METHODS: A total of 321 players aged 6-9 years underwent ultrasonographic examination, and the findings for the subchondral bone of the capitellum on the throwing side were graded as 0, 1a, 1b, 2, or 3. Subjects classified as grade 1a or 1b showed irregularities of the subchondral bone surface and were investigated radiographically for OCD...
July 20, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28719454/the-difference-in-clinical-outcomes-after-anterior-cervical-fusion-disk-replacement-and-foraminotomy-in-professional-athletes
#5
Harry T Mai, Danielle S Chun, Andrew D Schneider, Andrew C Hecht, Joseph C Maroon, Wellington K Hsu
STUDY DESIGN: Retrospective case series. OBJECT: To compare postoperative outcomes of professional athletes treated for cervical disk herniation after anterior cervical discectomy and fusion (ACDF) and posterior foraminotomy (PF), or total disk replacement (TDR). SUMMARY OF BACKGROUND DATA: ACDF, PF, and TDR have all led to excellent outcomes in the general population but the unique demands in the professional athlete necessitate specific study...
July 17, 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28714783/performance-outcomes-after-hook-of-hamate-fractures-in-major-league-baseball-players
#6
Michael S Guss, John P Begly, Austin J Ramme, David P Taormina, Michael E Rettig, John T Capo
CONTEXT: Major League Baseball (MLB) players are at risk of hook of hamate fractures. There is a paucity of data assessing the effect of a hook of hamate fracture on MLB players' future athletic performance. OBJECTIVE: To determine if MLB players who sustain hook of hamate fractures demonstrate decreased performance upon return to competition when compared with their performance before injury and that of their control-matched peers. DESIGN: Retrospective Case-Control Design...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28713174/fusing-multiple-neuroimaging-modalities-to-assess-group-differences-in-perception-action-coupling
#7
Jordan Muraskin, Jason Sherwin, Gregory Lieberman, Javier O Garcia, Timothy Verstynen, Jean M Vettel, Paul Sajda
In the last few decades, non-invasive neuroimaging has revealed macro-scale brain dynamics that underlie perception, cognition and action. Advances in non-invasive neuroimaging target two capabilities; 1) increased spatial and temporal resolution of measured neural activity, and 2) innovative methodologies to extract brain-behavior relationships from evolving neuroimaging technology. We target the second. Our novel methodology integrated three neuroimaging methodologies and elucidated expertise-dependent differences in functional (fused EEG-fMRI) and structural (dMRI) brain networks for a perception-action coupling task...
January 2017: Proceedings of the IEEE
https://www.readbyqxmd.com/read/28701678/paget-schroetter-syndrome-in-a-baseball-pitcher
#8
Shusuke Yagi, Minoru Mitsugi, Teruaki Sangawa, Masashi Akaike, Masataka Sata
Paget-Schroetter syndrome (PSS) is thrombosis of the deep veins draining the upper extremity due to anatomic abnormalities of the thoracic outlet that cause subclavian compression and subsequent thrombosis, leading to thrombus formation in the subclavian vein. Vigorous arm activity in sports is a known risk factor. Here, we report a case of Paget-Schroetter syndrome in a 31-year-old male non-professional baseball pitcher.
July 13, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28692836/multi-body-dynamic-coupling-mechanism-for-generating-throwing-arm-velocity-during-baseball-pitching
#9
Kozo Naito, Tokio Takagi, Hideaki Kubota, Takeo Maruyama
The purpose of this study was to identify the detailed mechanism how the maximum throwing arm endpoint velocity is determined by the muscular torques and non-muscular interactive torques from the perspective of the dynamic coupling among the trunk, thorax and throwing and non-throwing arm segments. The pitching movements of ten male collegiate baseball pitchers were measured by a three-dimensional motion capture system. Using the induced-segmental velocity analysis (IVA) developed in this study, the maximum fingertip velocity of the throwing arm (MFV) was decomposed into each contribution of the muscular torques, passive motion-dependent torques due to gyroscopic moment, Coriolis force and centrifugal force, and other interactive torque components...
July 7, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28690460/analysis-of-player-statistics-in-major-league-baseball-players-before-and-after-achilles-tendon-repair
#10
Bryan M Saltzman, Matthew W Tetreault, Daniel D Bohl, Danielle Tetreault, Simon Lee, Bernard R Bach
BACKGROUND: No currently available literature evaluates the effect of Achilles tendon repair on professional baseball players in the Major League Baseball (MLB). QUESTIONS/PURPOSES: The purpose of this study was to determine the impact of Achilles tendon rupture and repair on MLB players in terms of return to play and batting/fielding performance metrics. METHODS: Achilles tendon rupture data were retrospectively collected using information from the MLB disabled list, injury reports, MLB game summaries, player profiles, and publicly available news articles...
July 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28689823/performance-and-return-to-sport-in-elite-baseball-players-and-recreational-athletes-following-repair-of-the-latissimus-dorsi-and-teres-major
#11
Brandon J Erickson, Peter N Chalmers, Brian R Waterman, Justin W Griffin, Anthony A Romeo
BACKGROUND: Tears of the latissimus dorsi (LD) and teres major (TM) are rare but disabling injuries in the overhead athlete. METHODS: All patients who underwent an LD and/or TM repair between January 1, 2010, and June 6, 2016, with more than 12 months' follow-up were included. Demographic information and postoperative range of motion were recorded. Patients were contacted via phone and answered questions to provide the following: Kerlan-Jobe Orthopaedic Clinic (KJOC) shoulder and elbow outcome score, American Shoulder and Elbow Surgeons (ASES) shoulder score, and visual analog scale (VAS) score...
July 6, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28680897/high-prevalence-of-nontraumatic-shoulder-pain-in-a-regional-sample-of-female-high-school-volleyball-athletes
#12
Kayt E Frisch, Jacob Clark, Chad Hanson, Chris Fagerness, Adam Conway, Lindsay Hoogendoorn
BACKGROUND: Shoulder pain is becoming increasingly problematic in young players as volleyball gains popularity. Associations between repetitive motion and pain and overuse injury have been observed in other overhand sports (most notably baseball). Studies of adult athletes suggest that there is a shoulder pain and overuse problem present in volleyball players, but minimal research has been done to establish rates and causes in juvenile participants. PURPOSE: To establish rates of shoulder pain, regardless of whether it resulted in a loss of playing time, in female high school volleyball players...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28673743/-ice-axe-wrist-a-case-report-of-intersection-syndrome-in-2-climbers
#13
Anna L Tobin
Intersection syndrome is an inflammatory condition located at the crossing point between the first and second dorsal compartments in the wrist. It is an uncommon presentation but has been recognized as an injury typical of rowers (when it is named oarsman's wrist) and other sports such as racquet sports, baseball, cycling, hockey, golf, ice hockey, skiing, and softball. It has not been previously described in climbers. This report details 2 cases of intersection associated with the use of an ice axe. The first presentation was in a female climber who was using an ice axe for climbing in the Nepal Himalayas and the second was in a male climber using an ice axe for winter climbing training in the Alps...
June 30, 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28673735/properties-of-paraspinal-muscles-in-japanese-high-school-baseball-players-with-terminal-stage-lumbar-spondylolysis
#14
Hiroyuki Tsuboi, Yukihide Nishimura, Takeshi Sakata, Hideaki Tanina, Hideki Arakawa, Takeshi Nakamura, Yuichi Umezu, Fumihiro Tajima
BACKGROUND: Lumbar spondylolysis is a defect in the pars interarticularis that is common in young athletes; the stress distribution at the pars interarticularis is the highest in extension and rotation movements. The paraspinal muscles play an important role in stabilization of the lumbar spine; however, no study has assessed the properties of paraspinal muscles in athletes with lumbar spondylolysis. OBJECTIVE: To evaluate the properties of paraspinal muscles in athletes with lumbar spondylolysis...
June 30, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28654442/low-intensity-pulsed-ultrasound-therapy-for-a-symptomatic-persistent-olecranon-physis-in-an-adolescent-baseball-pitcher
#15
Kenneth Botwin, Thurston McMillen, Ariel Botwin
A 15-year-old competitive right-handed high school baseball pitcher experienced an acute onset of right elbow pain when throwing. He initially treated it conservatively with rest alone for 3 months, but on return to throwing, he was still experiencing pain. Radiographs revealed that he had a persistent olecranon physis. He proceeded with a trial of low-intensity pulsed ultrasound therapy and attained radiographic evidence of bony union at 7 months postinjury, thus avoiding surgical intervention. He returned to pitching competitively 9 months after injury without elbow pain...
June 22, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28646506/three-lessons-for-genetic-toxicology-from-baseball-analytics
#16
EDITORIAL
Stephen D Dertinger
In many respects the evolution of baseball statistics mirrors advances made in the field of genetic toxicology. From its inception, baseball and statistics have been inextricably linked. Generations of players and fans have used a number of relatively simple measurements to describe team and individual player's current performance, as well as for historical record-keeping purposes. Over the years, baseball analytics has progressed in several important ways. Early advances were based on deriving more meaningful metrics from simpler forerunners...
June 24, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/28644935/triquetrohamate-impaction-syndrome-an-unrecognized-cause-of-ulnar-sided-wrist-pain-its-presentation-further-defined
#17
Gary M Lourie, Colin Booth, Ross Nathan
BACKGROUND: The aim of this review was to further define the clinical condition triquetrohamate (TH) impaction syndrome (THIS), an entity underreported and missed often. Its presentation, physical findings, and treatment are presented. METHODS: Between 2009 and 2014, 18 patients were diagnosed with THIS. The age, sex, hand involved, activity responsible for symptoms, and defining characteristics were recorded. The physical findings, along with ancillary studies, were reviewed...
July 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28644678/professional-athletes-return-to-play-and-performance-after-operative-repair-of-an-achilles-tendon-rupture
#18
David P Trofa, J Chance Miller, Eugene S Jang, Denzel R Woode, Justin K Greisberg, J Turner Vosseller
BACKGROUND: Most Achilles tendon ruptures are sports related. However, few studies have examined and compared the effect of surgical repair for complete ruptures on return to play (RTP), play time, and performance across multiple sports. PURPOSE: To examine RTP and performance among professional athletes after Achilles tendon repair and compare pre- versus postoperative functional outcomes of professional athletes from different major leagues in the United States...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28638354/investigating-team-coordination-in-baseball-using-a-novel-joint-decision-making-paradigm
#19
Rob Gray, Nancy J Cooke, Nathan J McNeese, Jaimie McNabb
A novel joint decision making paradigm for assessing team coordination was developed and tested using baseball infielders. Balls launched onto an infield at different trajectories were filmed using four video cameras that were each placed at one of the typical positions of the four infielders. Each participant viewed temporally occluded videos for one of the four positions and were asked to say either "ball" if they would attempt to field it or the name of the bag that they would cover. The evaluation of two experienced coaches was used to assign a group coordination score for each trajectory and group decision times were calculated...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28632063/kinetic-analysis-of-the-lower-limbs-in-baseball-tee-batting
#20
Kazumichi Ae, Sekiya Koike, Norihisa Fujii, Michiyoshi Ae, Takashi Kawamura
The purpose of this study was to investigate effects of the ground reaction forces on the rotation of the body as a whole and on the joint torques of the lower limbs associated with trunk and pelvic rotation in baseball tee batting. A total of 22 male collegiate baseball players participated in this study. Three-dimensional coordinate data were acquired by a motion capture system (250 Hz), and ground reaction forces of both legs were measured with three force platforms (1,000 Hz). Kinetic data were used to calculate the moment about the vertical axis through the body's centre of mass resulting from ground reaction forces, as well as to calculate the torque and mechanical work in the lower limb joints...
February 28, 2017: Sports Biomechanics
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