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https://www.readbyqxmd.com/read/28203588/return-to-play-and-prior-performance-in-major-league-baseball-pitchers-after-repair-of-superior-labral-anterior-posterior-tears
#1
Ryan Smith, Daniel J Lombardo, Graysen R Petersen-Fitts, Charles Frank, Troy Tenbrunsel, Gannon Curtis, James Whaley, Vani J Sabesan
BACKGROUND: The published return-to-play (RTP) rates for Major League Baseball (MLB) pitchers who have undergone surgical repair of superior labrum anterior-posterior (SLAP) tears vary widely and are generally accepted to be lower in the subset of competitive throwers. The efficacy of surgical treatment for MLB players is largely unknown. PURPOSE: To examine the RTP rate and performance of MLB pitchers who have undergone SLAP tear repair between 2003 and 2010. STUDY DESIGN: Descriptive epidemiological study...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28196753/temporal-and-spatial-occlusion-of-advanced-visual-information-constrains-movement-re-organization-in-one-handed-catching-behaviors
#2
J A Stone, I W Maynard, J S North, D Panchuk, K Davids
Dynamic interceptive actions are performed under severe spatial and temporal constraints. Here, behavioral processes underpinning anticipation in one-handed catching were examined using novel technology to implement a spatial and temporal occlusion design. Video footage of an actor throwing a ball was manipulated to create four temporal and five spatial occlusion conditions. Data from twelve participants' hand kinematics and gaze behaviors were recorded while attempting to catch a projected ball synchronized with the video footage...
February 11, 2017: Acta Psychologica
https://www.readbyqxmd.com/read/28149736/arthroscopic-debridement-of-the-thrower-s-shoulder-less-is-more
#3
Paul E Caldwell, Dustin C Dyer, Sara E Pearson
The thrower's shoulder has long been a topic of debate among shoulder specialists. The tremendous forces produced during the throwing motion coupled with the compilation of the pathology encountered in the thrower's shoulder have generated a complex treatment algorithm. Simplifying management options has been challenging and recommendations continue to evolve. Treatment of injuries to the thrower's shoulder most commonly involves addressing partial articular-sided rotator cuff tears. These can be isolated or more commonly associated with tearing of the posterior superior labrum...
December 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28149523/differences-in-life-expectancy-between-olympic-high-jumpers-discus-throwers-marathon-and-100-meter-runners
#4
Jeffrey Lee-Heidenreich, David Lee-Heidenreich, Jonathan Myers
BACKGROUND: Several studies have demonstrated that body habitus is associated with survival (life expectancy) time. We sought to determine if survival differed between elite athletes with a range of body types. We hypothesized that the survival would differ between athlete types and that ectomorph athletes would have longer survival than heavier athletes. METHODS: For each Olympics between 1928 and 1948 we identified the top (up to 20) Olympic male and female finishers in the high jump (HJ), discus throw, marathon, and 100-m run...
2017: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28149401/transfer-of-mechanical-energy-during-the-shot-put
#5
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/28125544/acute-effect-of-countermovement-jumping-on-throwing-performance-in-track-and-field-athletes-during-competition
#6
Giorgos P Karampatsos, Panagiotis G Korfiatis, Nikolaos D Zaras, Giorgos V Georgiadis, Gerasimos D Terzis
Karampatsos, GP, Korfiatis, PG, Zaras, ND, Georgiadis, GV, and Terzis, GD. Acute effect of countermovement jumping on throwing performance in track and field athletes during competition. J Strength Cond Res 32(1): 359-364, 2017-The purpose of the study was to investigate whether performing 3 consecutive countermovement jumps (CMJs) just before an attempt enhances performance in track and field throwers during competition. Twelve shot putters, 8 hammer throwers, 9 discus throwers, and 3 javelin throwers of both sexes participated in the study...
February 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28102105/pitching-form-determines-probabilistic-structure-of-errors-in-pitch-location
#7
Masahiro Shinya, Shinji Tsuchiya, Yousuke Yamada, Kimitaka Nakazawa, Kazutoshi Kudo, Shingo Oda
According to recent motor control studies, it is important to know probabilistic structure of his/her own motor errors to choose an optimal motor plan (i.e., where you aim at) to maximise the expected gain. In this study, we questioned if pitching form determines the probabilistic structure of pitching errors in baseball pitchers. Eighteen collegiate baseball pitchers with various pitching forms including right- and left-handed overarm, sidearm and underarm throwers threw 100 pitches aiming at a target located 90 cm above the ground...
January 19, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28032029/evaluation-and-treatment-of-internal-impingement-of-the-shoulder-in-overhead-athletes
#8
REVIEW
Keith T Corpus, Christopher L Camp, David M Dines, David W Altchek, Joshua S Dines
One of the most common pathologic processes seen in overhead throwing athletes is posterior shoulder pain resulting from internal impingement. "Internal impingement" is a term used to describe a constellation of symptoms which result from the greater tuberosity of the humerus and the articular surface of the rotator cuff abutting the posterosuperior glenoid when the shoulder is in an abducted and externally rotated position. The pathophysiology in symptomatic internal impingement is multifactorial, involving physiologic shoulder remodeling, posterior capsular contracture, and scapular dyskinesis...
December 18, 2016: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28005101/ulnar-collateral-ligament-reconstruction-current-philosophy-in-2016
#9
E Lyle Cain, Taylor P Mathis
The ulnar collateral ligament (UCL) is the primary static restraint to valgus stress at the elbow. Since Jobe pioneered reconstruction in 1974, thousands of throwers have undergone UCL reconstruction, and good results have been achieved. The high-profile nature of the elite pitcher has brought this technique into the spotlight, and extensive research has been performed with new techniques emerging. The standard reconstruction, modified only slightly since Jobe's original description, remains the gold standard for treatment of UCL insufficiency...
November 2016: American Journal of Orthopedics
https://www.readbyqxmd.com/read/27886835/shoulder-injuries-in-the-overhead-throwing-athlete
#10
REVIEW
Ryan A Mlynarek, Simon Lee, Asheesh Bedi
The overhead pitching motion is a coordinated sequence of movements that subjects the shoulder to extreme forces. The ultimate goal of this complex, dynamic activity is to generate high ball velocity and accuracy. In doing so, repetitive throwing can cause adaptive and pathologic changes in the thrower's shoulder. This article reviews the relevant shoulder anatomy, the kinetic chain, and throwing mechanics, as well as common shoulder injuries and surgical options for the treating orthopedic surgeon.
February 2017: Hand Clinics
https://www.readbyqxmd.com/read/27864504/youth-baseball-pitching-stride-length-normal-values-and-correlation-with-field-testing
#11
Karl E Fry, Andrew Pipkin, Kelcie Wittman, Scott Hetzel, Marc Sherry
BACKGROUND: Pitching biomechanical analysis has been recommended as an important component of performance, injury prevention, and rehabilitation. Normal values for youth pitching stride length have not been established, leading to application of normative values found among professional pitchers to youth pitchers. HYPOTHESES: The average youth pitching stride length will be significantly less than that of college and professional pitchers. There will be a positive correlation between stride length, lower extremity power, balance, and pitching experience...
November 18, 2016: Sports Health
https://www.readbyqxmd.com/read/27852593/humeral-retrotorsion-and-glenohumeral-motion-in-youth-baseball-players-compared-with-age-matched-nonthrowing-athletes
#12
Elliot M Greenberg, J Todd R Lawrence, Alicia Fernandez-Fernandez, Philip McClure
BACKGROUND: Baseball players exhibit a more posteriorly oriented humeral head in their throwing arm. This is termed humeral retrotorsion (HRT) and likely represents a response to the stress of throwing. This adaptation is thought to occur while the athlete is skeletally immature, however currently there is limited research detailing how throwing activity in younger players influences the development of HRT. In addition, it is presently unclear how this changing osseous orientation may influence shoulder motion within young athletes...
February 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27825229/the-influence-of-coronene-super-hydrogenation-on-the-coronene-graphite-interaction
#13
Anders W Skov, Mie Andersen, John D Thrower, Bjarke Jørgensen, Bjørk Hammer, Liv Hornekær
The changes in the strength of the interaction between the polycyclic aromatic hydrocarbon, coronene, and graphite as a function of the degree of super-hydrogenation of the coronene molecule are investigated using temperature programmed desorption. A decrease in binding energy is observed for increasing degrees of super-hydrogenation, from 1.78 eV with no additional hydrogenation to 1.43 eV for the fully super-hydrogenated molecule. Density functional theory calculations using the optB88-vdW functional suggest that the decrease in binding energy is mostly due to an increased buckling of the molecule rather than the associated decrease in the number of π-electrons...
November 7, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27811520/shoulder-and-elbow-injuries-in-the-adolescent-athlete
#14
Mia Smucny, Joel Kolmodin, Paul Saluan
With the recent increase in youth sports participation and single-sport youth athletes over the past 30 years, there has been an increase in the number of acute and overuse sports injuries in this population. This review focuses on overuse and traumatic injuries of the shoulder and elbow in young athletes. In particular we discuss little league shoulder, glenohumeral internal rotation deficit, glenohumeral instability, superior labrum anterior posterior lesions, Little League elbow, Panner disease, osteochondritis dissecans of the capitellum, posteromedial elbow impingement, and posterolateral rotatory instability of the elbow...
December 2016: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/27777822/the-role-of-dynamic-4d-ct-in-the-detection-of-scapholunate-ligament-injury
#15
Sanjeev Kakar, Ryan E Breighner, Shuai Leng, Cynthia H McCollough, Steven L Moran, Richard A Berger, Kristin D Zhao
Background Scapholunate (SL) interosseus ligament injuries detected at an early stage could allow the surgeon to prevent progression through the spectrum of injury that leads to instability, and eventually osteoarthritis. We contend that early instability following injury can be detected by visualizing the relative motions and distances between the involved carpal bones (scaphoid and lunate) during wrist movement in vivo. The purpose of this study is to demonstrate the utility of dynamic CT (i.e., 4DCT) in diagnosing SL interosseus ligament injuries in two patients with clinical suspicion of SL interosseus ligament injury during flexion-extension (FE), radial-ulnar (RU) deviation, and dart thrower's (DT) motions...
November 2016: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/27742247/fresh-osteochondral-allograft-transplantation-for-osteochondritis-dissecans-of-the-capitellum-in-baseball-players
#16
Raffy Mirzayan, Michael J Lim
BACKGROUND: Osteochondritis dissecans (OCD) of the capitellum is a rare yet debilitating injury seen in young athletes. This is the first report in the literature describing fresh osteochondral allograft transplantation (FOCAT) to treat OCD of the capitellum. METHODS: Nine male baseball players (mean age, 15.3; range, 14-18 years), with OCD of the capitellum were treated with FOCAT. There were 6 pitchers and 3 position players. A ligament-sparing, mini-open approach was used...
November 2016: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27693967/rna-seq-reveals-differential-gene-expression-in-the-brains-of-juvenile-resident-and-migratory-smolt-rainbow-trout-oncorhynchus-mykiss
#17
Matthew C Hale, Garrett J McKinney, Frank P Thrower, Krista M Nichols
Many migratory traits are heritable, but there is a paucity of evidence identifying the molecular mechanisms underlying differentiation in alternative migratory tactics, or in linking variation in gene expression to migratory behaviors. To that end, we examined differential gene expression in the brain transcriptome between young steelhead trout that had undergone the smoltification process, and resident rainbow trout (Oncorhynchus mykiss) from Sashin Creek, Alaska. Samples were sequenced from two time points: immediately before (at 20months of age) and during (2years of age) the presumed peak of smoltification...
September 4, 2016: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/27649519/computational-study-of-the-interactions-between-benzene-and-crystalline-ice-ih-ground-and-excited-states
#18
Divya Sharma, W M C Sameera, Stefan Andersson, Gunnar Nyman, Martin J Paterson
Ground-state geometries of benzene on crystalline ice cluster model surfaces (Ih ) are investigated. It is found that the binding energies of benzene-bound ice complexes are sensitive to the dangling features of the binding sites. We used time-dependent DFT to study the UV spectroscopy of benzene, ice clusters, and benzene-ice complexes, by employing the M06-2X functional. It is observed that the size of the ice cluster and the dangling features have minor effects on the UV spectral characteristics. Benzene-mediated electronic excitations of water towards longer wavelengths (above 170 nm) are noted in benzene-bound ice clusters, where the cross-section of photon absorption by water is negligible, in good agreement with recent experimental results (Thrower et al...
December 15, 2016: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/27618241/elbow-injuries-in-the-young-throwing-athlete
#19
Benjamin L Oshlag, Tracy R Ray
Baseball pitchers and other throwing athletes place their elbows under tremendous stresses, making them vulnerable to a number of unique injuries. Skeletally immature throwers in particular are at a greater risk for growth plate and other bony injuries, due to the relative strengths of these tissues and the kinematics involved in throwing. Care should be taken to fully evaluate these injuries based on the particular history and presentation to properly direct treatment and rehabilitation. Patients, as well as other athletes, coaches, and families, also should be made aware of the significant risk factors for these injuries, especially those regarding pitch limits, proper mechanics, and sufficient rest...
September 2016: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/27610314/a-wireless-sensor-system-for-a-biofeedback-training-of-hammer-throwers
#20
Ye Wang, Bingjun Wan, Hua Li, Gongbing Shan
Hammer-throw has a long-standing history in track and field, but unlike some other sports events, men's hammer throw has not seen a new world record since 1986. One of the possible reasons for this stagnation could be the lack of real-time biomechanical feedback training. In this study, we proposed to establish scientifically described training targets and routes, which in turn required tools that could measure and quantify characteristics of an effective hammer-throw. Towards this goal, we have developed a real-time biomechanical feedback device-a wireless sensor system-to help the training of hammer-throw...
2016: SpringerPlus
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