scholarly journals Swing Type and Batting Grip Affect Peak Pressures on the Hook of Hamate in Collegiate Baseball Players

2021 ◽  
Vol 9 (12) ◽  
pp. 232596712110608
Author(s):  
Lindsay S. Flynn ◽  
George J. Richard ◽  
Heather K. Vincent ◽  
Michelle Bruner ◽  
Cong Chen ◽  
...  
Keyword(s):  
National Collegiate Athletic Association ◽  
Peak Pressure ◽  
Randomized Study ◽  
Level Of Evidence ◽  
Baseball Players ◽  
Collegiate Baseball ◽  
Pressure Development ◽  
Angular Velocities ◽  
Hook Of Hamate ◽  
Full Swing

Background: Bat swing and grip type may contribute to hook of hamate fractures in baseball players. Purpose: To compare the effects of swing type and batting grip on the pressure and rate of pressure development over the hook of hamate in collegiate baseball players. Study Design: Descriptive laboratory study. Level of evidence, 3. Methods: This was an experimental quasi-randomized study of bat grip and swing differences in National Collegiate Athletic Association Division I baseball players (N = 14; age, 19.6 ± 1.1 years [mean ± SD]). All participants performed swings under 6 combinations: 3 grip types (all fingers on the bat shaft [AO], one finger off the bat shaft [OF], and choked up [CU]) and 2 swing types (full swing and check swing). Peak pressure and rate of pressure generation over the area of the hamate were assessed using a pressure sensor fitted to the palm of the bare hand over the area of the hamate. Wrist angular velocities and excursions of radial ulnar deviation were obtained using 3-dimensional motion analysis. Results: The OF–check swing combination produced the highest peak pressure over the hamate (3.72 ± 2.64 kg/cm2) versus the AO–full swing (1.36 ± 0.73 kg/cm2), OF–full swing (1.68 ± 1.17 kg/cm2), and CU–full swing (1.18 ± 0.96 kg/cm2; P < .05 for all). There was a significant effect of condition on rate of pressure development across the 6 conditions ( P = .023). Maximal wrist angular velocities were 44% lower in all check swing conditions than corresponding full swing conditions ( P < .0001). The time to achieve the maximal wrist angular velocity was longest with the AO–full swing and shortest with the CU–check swing (100.1% vs 7.9% of swing cycle; P = .014). Conclusion: The OF–check swing condition produced the highest total pressure reading on the hook of hamate. Check swing conditions also had the steepest rate of pressure development as compared with the full swing conditions. Clinical Relevance: Batters who frequently check their swings and use an OF or AO grip may benefit from bat modifications or grip adjustment to reduce stresses over the hamate. Athletic trainers and team physicians should be aware of these factors to counsel players in the context of previous or ongoing hand injury.

scholarly journals Examining Changes in Bat Swing Kinematics in Different Areas of the Strike Zone in Collegiate Baseball Players

2020 ◽  
Vol 8 (2) ◽  
pp. 1
Author(s):  
Charles C. Williams ◽  
Paul T. Donahue ◽  
Samuel J. Wilson ◽  
J. Grant Mouser ◽  
Christopher M. Hill ◽  
...  
Keyword(s):  
Repeated Measures ◽  
National Collegiate Athletic Association ◽  
Baseball Players ◽  
Warm Up ◽  
Game Situation ◽  
Resultant Velocity ◽  
Ball Contact ◽  
Collegiate Baseball ◽  
Collegiate Level ◽  
Bat Performance

Background: According to the National Collegiate Athletic Association (NCAA) there are over 34,000 athletes who compete in baseball at the collegiate level. These individuals spend countless hours training to improve their ability at bat performance by use of a batting tee and their position preference. However, during a game situation an athlete may swing a bat through their strike zone depending on the pitch thrown by an opposing pitcher. Objective: The aim of this investigation was to examine changes in swing kinematics throughout an individual’s strike zone in collegiate baseball players. Variables of interest included resultant velocity at ball contact (RVBC) and the angle of the bat at ball contact (BABC). Methodology: A series of markers were placed on the tee and bat to record swing kinematic variables of interest. Participants completed a brief two-minute on-deck warm-up protocol before being counterbalanced into completing 15 swing trials in various regions of their respective strike zone. A ten-minute washout period was completed followed by another 15 swing trials throughout their strike zone until there was a total of 45 swing trials, having 5 swing trials completed in each of the nine regions of the strike zone. Results: Repeated measures analysis of variance were used to examine swing kinematic variables of interest. Significant differences were found in RVBC along with significant differences in BABC (p<.05). Conclusions: Knowledge of this information can allow both athlete and sport coach to identify areas of weakness when addressing their hitting performance in preparation for an at bat situation during a game.

scholarly journals Pressures Exerted on the Hook of the Hamate in Collegiate Baseball Players: A Comparison of Grips, With Emphasis on Fracture Prevention

2021 ◽  
Vol 9 (10) ◽  
pp. 232596712110450
Author(s):  
Mikhail Alexeev ◽  
Steven M. Kane ◽  
Gary M. Lourie
Keyword(s):  
Confidence Interval ◽  
National Collegiate Athletic Association ◽  
Force Sensor ◽  
Fracture Prevention ◽  
Division I ◽  
Maximum Pressure ◽  
Laptop Computer ◽  
Baseball Players ◽  
Increased Risk ◽  
Collegiate Baseball

Background: Variations in batting technique may put baseball players at increased risk of hook of the hamate fractures. A better comprehension of the mechanism of such fractures is needed. Purpose/Hypothesis: The purpose of the study was to compare 2 different grip types to quantify the pressures exerted on the hook of the hamate during batting. It was hypothesized that when compared with the conventional batting style, players holding the knob of the bat in the palm of the hand (termed the “palmar hamate grip”) would have higher pressures exerted on the hook of the hamate. Study Design: Controlled laboratory study. Methods: Athletes were recruited for participation on a volunteer basis from the rosters of 2 National Collegiate Athletic Association Division I baseball teams and were divided into 2 groups based on their usual grip type. A force sensor system was applied to the nondominant hand of each participating player, with the central portion of the sensing mechanism placed on the batting glove directly over the hook of the hamate. All players used the same batting glove, which transmitted data from the sensor to a laptop computer. Measurements were collected on consecutive hits at a standardized distance using a ball machine at 70 mph. Results: Nine collegiate baseball players underwent testing (5 players exclusively used the conventional grip, 3 players exclusively used the palmar hamate grip, and 1 player naturally alternated between the 2 grip types). The palmar hamate grip demonstrated a 366% increase in pressure exerted on the sensor overlying the hook of the hamate when compared with the conventional batting grip (536.42 kPa [95% confidence interval, 419.39-653.44 kPa] vs 115.84 kPa [95% confidence interval, 96.97-135.10 kPa]). The player who used both grips demonstrated significantly higher maximum pressure when using the palmar hamate versus conventional grip (482.90 vs 142.40 kPa; t = 6.95; P < .0001). Conclusion: Use of the palmar hamate grip may increase the risk of hook of the hamate fracture in National Collegiate Athletic Association Division I baseball players. Clinical Relevance: Educating players on the risks associated with the palmar hamate grip may prevent injury and minimize time out of competition.

scholarly journals Incidence Of Elbow Ulnar Collateral Ligament Surgery In Collegiate Baseball Players

2019 ◽  
Vol 7 (7_suppl5) ◽  
pp. 2325967119S0031
Author(s):  
Marcus A. Rothermich ◽  
Stan A. Conte ◽  
Glenn S. Fleisig ◽  
E. Lyle Cain ◽  
Jeffrey R. Dugas
Keyword(s):  
Ncaa Division I ◽  
National Collegiate Athletic Association ◽  
Ulnar Collateral Ligament ◽  
Progressive Increase ◽  
Division I ◽  
Collateral Ligament ◽  
Baseball Players ◽  
Collegiate Baseball ◽  
Internal Brace ◽  
Surgical Injuries

Objectives: Recent studies in the literature have highlighted the progressive increase in the incidence of ulnar collateral ligament (UCL) injuries to the elbow in baseball players of all levels. However, knowledge of the incidence and other epidemiological factors regarding UCL injuries, specifically in college baseball players, is currently lacking. In 2016, we launched a prospective, multi-year study to evaluate the incidence of UCL injuries requiring surgery in National Collegiate Athletic Association (NCAA) Division I baseball programs. Methods: We invited 157 Division I collegiate baseball programs after the 2017 season, and 155 agreed to participate in the study. After the 2018 season, all 297 programs were invited and 294 participated. At the conclusion of the 2017 and 2018 collegiate baseball seasons, the athletic trainer for each program entered anonymous, detailed information on injured players through an electronic survey into a secured database. Results: We obtained a 100% completion rate in the first two years of this ongoing study (155/155 respondents in the first year, 294/294 in the second year). Of the 5,364 collegiate baseball players tracked in Year 1 (2016-2017), 134 underwent surgery for an injured UCL, resulting in a team surgery rate of 0.86 per program. In Year 2 (2017-2018), there were 230 surgeries reported from 10,019 players tracked, resulting in a team surgery rate of 0.78 per program. A majority of schools experienced at least one surgery during both years (56.8% in Year 1, 50.7% in Year 2). Pitchers experience a vast majority of the surgical injuries (85.8% in Year 1, 84.3% in Year 2). Underclassmen made up 65.7% of surgeries in Year 1, which fell slightly to 56.1% in Year 2. Nearly half of the surgeries occurred during an ongoing baseball season in Year 1 (48.5%), but this fell in Year 2 to 41.3%. In both years, a non-significant majority of players were from warm-weather states (65.4% in Year 1, 52.9% in Year 2). Revision surgical rates remained nearly constant with 3.0% revision surgeries in Year 1 compared with 2.6% revisions in Year 2. Interestingly, the percentage of UCL repairs with internal brace augmentation rose from 9.5% in Year 1 to 19.9% of all procedures in Year 2. Conclusion: The incidence of UCL surgeries in NCAA Division I collegiate baseball players represents substantial morbidity to this young athletic population. This multi-year prospective study has been established to assess the incidence of surgical UCL injuries in collegiate baseball. Also, importantly, with multiple years of data we will identify trends in the demographics of players undergoing surgery and in surgical details over time. Awareness of these factors should be considered in injury prevention programs in the future.

scholarly journals Incidence of Elbow Ulnar Collateral Ligament Surgery in Collegiate Baseball Players

2018 ◽  
Vol 6 (4) ◽  
pp. 232596711876465 ◽  
Author(s):  
Marcus A. Rothermich ◽  
Stan A. Conte ◽  
Kyle T. Aune ◽  
Glenn S. Fleisig ◽  
E. Lyle Cain ◽  
...  
Keyword(s):  
Ncaa Division I ◽  
National Collegiate Athletic Association ◽  
Ulnar Collateral Ligament ◽  
Initial Study ◽  
Division I ◽  
Cold Weather ◽  
Collateral Ligament ◽  
Baseball Players ◽  
Electronic Survey ◽  
Collegiate Baseball

Background: Recent reports have highlighted the progressive increase in the incidence of ulnar collateral ligament (UCL) injuries to the elbow in baseball players of all levels. However, knowledge of the incidence and other epidemiological factors regarding UCL injuries, specifically in college baseball players, is currently lacking. Purpose: To evaluate, over a period of 1 year, the incidence of UCL injuries requiring surgery in National Collegiate Athletic Association (NCAA) Division I baseball programs. Study Design: Descriptive epidemiology study. Methods: A total of 155 Division I collegiate baseball programs agreed to participate in the study. Demographics (position, year, background [location of high school]) for all players on these rosters were obtained from public websites. At the conclusion of the 2017 collegiate baseball season, the athletic trainer for each program entered anonymous, detailed information on injured players through an electronic survey into a secured database. Results: All 155 teams enrolled in the study completed the electronic survey. Of the 5295 collegiate baseball players on these rosters, 134 underwent surgery for an injured UCL (2.5% of all eligible athletes), resulting in a team surgery rate of 0.86 per program for 1 year. These 134 players came from 88 teams, thus 56.8% of the study teams underwent at least 1 surgery during the year. The surgery rate was 2.5 per 100 player-seasons for all players and was significantly higher among pitchers (4.4/100 player-seasons) than nonpitchers (0.7/100 player-seasons). The surgery rate was also significantly higher in underclassmen (3.1/100 player-seasons among freshmen and sophomores) than upperclassmen (1.9/100 player-seasons among juniors and seniors) (incidence rate ratio, 1.7; 95% CI, 1.1-2.4). Players from traditionally warm-weather states did not undergo UCL surgery at a significantly different rate from players from traditionally cold-weather states (2.7/100 player-seasons vs 2.1/100 player-seasons, respectively). Nearly half of surgeries (48.5%) were performed during the baseball season. Conclusion: The incidence of UCL surgeries in NCAA Division I collegiate baseball players represents substantial morbidity to this young athletic population. Risk factors for injuries requiring surgery include being a pitcher and an underclassman. Awareness of these factors should be considered in injury prevention programs. Furthermore, this initial study can serve as a foundation for tracking these surgical injuries in future years and then identifying trends over time.

scholarly journals Short-Term Trends in Elbow Ulnar Collateral Ligament Surgery in Collegiate Baseball Players: An Analysis of 25,587 Player-Years

2021 ◽  
Vol 9 (7) ◽  
pp. 232596712110168
Author(s):  
Marcus A. Rothermich ◽  
Glenn S. Fleisig ◽  
Stan A. Conte ◽  
Karen M. Hart ◽  
E. Lyle Cain ◽  
...  
Keyword(s):  
National Collegiate Athletic Association ◽  
Ulnar Collateral Ligament ◽  
Division I ◽  
Cold Weather ◽  
Lower Percentage ◽  
Collateral Ligament ◽  
Baseball Players ◽  
Electronic Survey ◽  
Collegiate Baseball ◽  
Surgical Injuries

Background: Trends over time in the incidence of ulnar collateral ligament (UCL) surgeries in National Collegiate Athletic Association Division I baseball players are currently unknown. Purpose/Hypothesis: The purpose of this study was to evaluate the trends in UCL surgeries over 3 years in Division I baseball programs. We hypothesized that surgical injuries would be consistently high over the course of the study. Study Design: Descriptive epidemiology study. Methods: Athletic trainers from Division I baseball programs were invited to participate in an electronic survey over 3 seasons. A total of 155 baseball programs agreed to participate in 2017, 294 programs participated in 2018, and 296 programs participated in 2019. After each of the 3 collegiate baseball seasons, the athletic trainer from each program entered anonymous, detailed descriptive data and surgical information on injured players into a secured database. Results: During the 3 years of this study, 100% of the enrolled programs successfully completed the survey (155/155 in year 1, 294/294 in year 2, and 296/296 in year 3). This registry of 745 completed surveys over 3 years represented 25,587 player-years from Division I collegiate baseball. The percentage of programs with at least 1 UCL surgery during this time was 57% in 2017, 51% in 2018, and 49% in 2019. The majority of these players were pitchers (84% overall from the 3 years). Seniors underwent a significantly lower percentage of the UCL surgeries (8% in 2017, 10% in 2018, and 13% in 2019) than did underclassmen. Surgeries were performed most often in-season and least often during the preseason. A slight majority of players undergoing surgery originated from warm-weather states, but the number of these players was never significantly higher than was the number of players from cold-weather states. Most surgeries performed each year were UCL reconstruction, but the percentage of UCL repair with ligament augmentation increased each year (10% UCL repairs in 2017, 20% in 2018, and 25% in 2019). Conclusion: UCL injuries requiring surgery were found to be a major source of morbidity in Division I collegiate baseball, supporting our hypothesis. This study can serve as a baseline for tracking long-term trends in UCL surgeries in collegiate baseball.

scholarly journals Changes in Maximal Strength and Home Run Performance in NCAA Division I Baseball Players Across 3 Competitive Seasons: A Descriptive Study

2021 ◽  
Vol 6 (1) ◽  
pp. 4
Author(s):  
W. Guy Hornsby ◽  
Abigail L. Tice ◽  
Jason D. Stone ◽  
Justin J. Merrigan ◽  
Joshua Hagen ◽  
...  
Keyword(s):  
Ncaa Division I ◽  
Repeated Measures ◽  
National Collegiate Athletic Association ◽  
Descriptive Study ◽  
Peak Force ◽  
Division I ◽  
Maximal Strength ◽  
Baseball Players ◽  
Repeated Measures Analysis ◽  
Division 1

The purpose of this longitudinal, descriptive study was to observe changes in maximal strength measured via isometric clean grip mid-thigh pull and home runs (total and home runs per game) across three years of training and three competitive seasons for four National Collegiate Athletic Association (NCAA) Division 1 baseball players. A one-way repeated measures analysis of variance (ANOVA) was performed, revealing significant univariate effects of time for peak force (PF) (p = 0.003) and peak force allometrically scaled (PFa) (p = 0.002). Increases in PF were noted from season 1 to season 2 (p = 0.031) and season 3 (p = 0.004), but season 2 was not significantly different than season 3 (p = 0.232). Additionally, increases in PFa were noted from season 1 to season 2 (p = 0.010) and season 3 (p < 0.001), but season 2 was not significantly different than season 3 (p = 0.052). Home runs per game rose from the 2009 (0.32) to 2010 season (1.35) and dropped during the 2011 season (1.07). A unique aspect of the study involves 2010 being the season in which ball-bat coefficient of restitution (BBCOR) bats were introduced to the NCAA competition.

Diagnosis and management of hook of hamate fractures

2017 ◽  
Vol 43 (5) ◽  
pp. 539-545 ◽  
Author(s):  
Assaf Kadar ◽  
Allen T. Bishop ◽  
Marissa A. Suchyta ◽  
Steven L. Moran
Keyword(s):  
Case Series ◽  
Clinical Results ◽  
Clinical Findings ◽  
Advanced Imaging ◽  
Level Of Evidence ◽  
Historical Case ◽  
Treatment Groups ◽  
Diagnosis And Management ◽  
Time To Diagnosis ◽  
Hook Of Hamate

The purpose of this study was to evaluate the time to diagnosis and management of hook of hamate fractures in an era of advanced imaging. We performed a retrospective study of 51 patients treated for hook of hamate fractures. Patients were sent a quickDASH questionnaire regarding the outcomes of their treatment. Hook of hamate fractures were diagnosed with advanced imaging at a median of 27 days. Clinical findings of hook of hamate tenderness had better sensitivity than carpal tunnel-view radiographs. Nonunion occurred in 24% of patients with non-operative treatment and did not occur in the operative group. Both treatment groups achieved good clinical results, with a grip strength of 80% compared with the non-injured hand and a median quickDASH score of 2. Advanced imaging improved the time to diagnosis and treatment compared to historical case series. Nonunion is common in patients treated non-operatively. Level of evidence: IV

A comparison of intramedullary cannulated screws versus miniplates for fixation of unstable metacarpal diaphyseal fractures

2021 ◽  
pp. 175319342110215
Author(s):  
Birkan Kibar ◽  
Ali Cavit ◽  
Abdullah Örs
Keyword(s):  
Plate Fixation ◽  
Randomized Study ◽  
Good Alternative ◽  
Active Movement ◽  
Cannulated Screws ◽  
Level Of Evidence ◽  
Visual Analogue Pain ◽  
Plate Group ◽  
Significant Difference ◽  
Diaphyseal Fractures

We carried out a prospective randomized study to compare the clinical and radiological results of metacarpal diaphyseal fractures treated with retrograde intramedullary headless cannulated screws (IHCS) and plates. Fractures were fixed with IHCS in 34 patients (37 metacarpals) and locked miniplates in 35 patients (40 metacarpals). The mean age was 33 years (range 18–61) in the IHCS group and 32 years (range 17–68) in plate group. All patients were followed up for 1 year. All fractures in the IHCS group united but there was one nonunion in the plate group. At final follow-up, there was no significant difference between the groups in total active movement, visual analogue pain score, Disabilities of the Arm, Shoulder, and Hand score and grip strength, although the study was not sufficiently powered to exclude differences with certainty. IHCS is a safe and fast technique that is a good alternative to plate fixation in metacarpal diaphyseal fractures. Level of evidence: I

scholarly journals Effect of Head Impact Exposures on Changes in Cognitive Testing

2018 ◽  
Vol 6 (3) ◽  
pp. 232596711876103 ◽  
Author(s):  
Eleni Diakogeorgiou ◽  
Theresa L. Miyashita
Keyword(s):  
Reaction Time ◽  
National Collegiate Athletic Association ◽  
Assessment Tool ◽  
Vital Signs ◽  
Head Impact ◽  
Cognitive Testing ◽  
Repeated Impact ◽  
Level Of Evidence ◽  
Head Impacts ◽  
Significant Difference

Background: Gaining a better understanding of head impact exposures may lead to better comprehension of the possible effects of repeated impact exposures not associated with clinical concussion. Purpose: To assess the correlation between head impacts and any differences associated with cognitive testing measurements pre- and postseason. Study Design: Case-control study; Level of evidence, 3. Methods: A total of 34 National Collegiate Athletic Association Division I men’s lacrosse players wore lacrosse helmets instrumented with an accelerometer during the 2014 competitive season and were tested pre- and postseason with the Sport Concussion Assessment Tool (SCAT 3) and Concussion Vital Signs (CVS) computer-based neurocognitive tests. The number of head impacts >20 g and results from the 2 cognitive tests were analyzed for differences and correlation. Results: There was no significant difference between pre- and postseason SCAT 3 scores, although a significant correlation between pre- and postseason cognitive scores on the SCAT 3 and total number of impacts sustained was noted ( r = –0.362, P = .035). Statistically significant improvements on half of the CVS testing components included visual reaction time ( P = .037, d = 0.37), reaction time ( P = .001, d = 0.65), and simple reaction time ( P = .043, d = 0.37), but no correlation with head impacts was noted. Conclusion: This study did not find declines in SCAT 3 or CVS scores over the course of a season among athletes who sustained multiple head impacts but no clinical concussion. Thus, it could not be determined whether there was no cognitive decline among these athletes or whether there may have been subtle declines that could not be measured by the SCAT 3 or CVS.

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