scholarly journals Both visual tracking and manual control performance predict infield batting accuracy in professional baseball players

2017 ◽  
Vol 17 (10) ◽  
pp. 812
Author(s):  
Rongrong Chen ◽  
Dorion Liston ◽  
Li Li
Keyword(s):  
Visual Tracking ◽  
Manual Control ◽  
Professional Baseball ◽  
Control Performance ◽  
Baseball Players

scholarly journals Human manual control precision depends on vestibular sensory precision and gravitational magnitude

2018 ◽  
Vol 120 (6) ◽  
pp. 3187-3197 ◽  
Author(s):  
Marissa J. Rosenberg ◽  
Raquel C. Galvan-Garza ◽  
Torin K. Clark ◽  
David P. Sherwood ◽  
Laurence R. Young ◽  
...  
Keyword(s):  
Manual Control ◽  
Control Performance ◽  
Control Task ◽  
Altered Gravity ◽  
Control Precision ◽  
Functional Implications ◽  
Potential Risk Factors ◽  
And Performance ◽  
Human Exploration ◽  
Roll Tilt

Precise motion control is critical to human survival on Earth and in space. Motion sensation is inherently imprecise, and the functional implications of this imprecision are not well understood. We studied a “vestibular” manual control task in which subjects attempted to keep themselves upright with a rotational hand controller (i.e., joystick) to null out pseudorandom, roll-tilt motion disturbances of their chair in the dark. Our first objective was to study the relationship between intersubject differences in manual control performance and sensory precision, determined by measuring vestibular perceptual thresholds. Our second objective was to examine the influence of altered gravity on manual control performance. Subjects performed the manual control task while supine during short-radius centrifugation, with roll tilts occurring relative to centripetal accelerations of 0.5, 1.0, and 1.33 GC (1 GC = 9.81 m/s2). Roll-tilt vestibular precision was quantified with roll-tilt vestibular direction-recognition perceptual thresholds, the minimum movement that one can reliably distinguish as leftward vs. rightward. A significant intersubject correlation was found between manual control performance (defined as the standard deviation of chair tilt) and thresholds, consistent with sensory imprecision negatively affecting functional precision. Furthermore, compared with 1.0 GC manual control was more precise in 1.33 GC (−18.3%, P = 0.005) and less precise in 0.5 GC (+39.6%, P < 0.001). The decrement in manual control performance observed in 0.5 GC and in subjects with high thresholds suggests potential risk factors for piloting and locomotion, both on Earth and during human exploration missions to the moon (0.16 G) and Mars (0.38 G). NEW & NOTEWORTHY The functional implications of imprecise motion sensation are not well understood. We found a significant correlation between subjects’ vestibular perceptual thresholds and performance in a manual control task (using a joystick to keep their chair upright), consistent with sensory imprecision negatively affecting functional precision. Furthermore, using an altered-gravity centrifuge configuration, we found that manual control precision was improved in “hypergravity” and degraded in “hypogravity.” These results have potential relevance for postural control, aviation, and spaceflight.

scholarly journals Comparative Analysis of the Nonoperative Treatment of Elbow Ulnar Collateral Ligament Injuries in Professional Baseball Players with and without Platelet-Rich Plasma

2018 ◽  
Vol 6 (7_suppl4) ◽  
pp. 2325967118S0008 ◽  
Author(s):  
Peter Douglas McQueen ◽  
Christopher L. Camp ◽  
Aakash Chauhan ◽  
Brandon J. Erickson ◽  
Hollis G. Potter ◽  
...  
Keyword(s):  
Recovery Time ◽  
Platelet Rich Plasma ◽  
Ulnar Collateral Ligament ◽  
Nonoperative Treatment ◽  
Return To Play ◽  
Professional Baseball ◽  
Collateral Ligament ◽  
Baseball Players ◽  
Minor League Baseball ◽  
Minor League

Objectives: In the setting of ulnar collateral ligament (UCL) injury, surgical reconstruction of the UCL is not always selected, as it leads to a prolonged recovery time and return to play rates between 67-95%. To date, there is limited data on outcomes following nonoperative treatment in this population. Orthobiologics, such as platelet-rich plasma (PRP), have recently been used as an adjunct therapy for standard nonoperative treatment including rest and physical therapy for UCL injuries. The objective of this study was to determine if the addition of PRP injections in professional baseball players with UCL injuries reduces recovery time, lowers the likelihood of surgery, and increases the return to play rate compared to traditional nonoperative treatment. Methods: The Health and Injury Tracking System (HITS) database was searched from 2011-2015 for Major and Minor league baseball players with Grade I, II or III UCL injuries. Standard demographic, injury, and return to play data was obtained for all players. MRI’s for 353 athletes were reviewed by a musculoskeletal radiologist and graded accordingly. Outcomes were compared between players who received PRP injections in addition to traditional nonoperative treatment (PRP group) and players who received traditional nonoperative treatment alone (No PRP group). Statistical analysis was performed using Student’s T-test and Chi-square for parametric data. Kaplan Meier’s analysis was used for estimating longevity of the treatment. Results: A total of 544 Major and Minor League Baseball players with UCL tears underwent an initial course of nonoperative treatment (active rest & rehabilitation) for their injury between 2011-2015. Of these, 133 underwent PRP injections plus rehab and 411 underwent rehab alone. There was a significantly higher proportion of Major League Baseball players in the PRP group compared to the No PRP group (25.6% vs 9.0%, P<0.001). There was no difference between the two cohorts in regard to the grade of UCL tear (Figure 1). The players in the PRP group had a significantly longer time before returning to a throwing program compared to the No PRP group (64 days vs 51 days, P<0.001). The mean time from injury date to PRP injection was 14.5 days, which may explain the difference in time to return to throwing. The return to play rate in a live game without surgery was significantly lower in the PRP group compared to the No PRP group (46% vs 57%, P=0.03). There was no difference in the proportion of athletes requiring UCL reconstruction (58% vs 51%) or the time to surgery (154 days vs 178 days) between the two groups. Kaplan Meier survivor analysis showed no difference between the PRP and No PRP groups with regard to longevity of the native UCL (Figure 2). Conclusion: Among Major and Minor League Baseball players who were treated nonoperatively for a UCL injury between 2011-2015, 24% underwent PRP injections prior to rehab. Compared to traditional nonoperative rehab alone program, players who received PRP injections experienced a significantly longer time before returning to throwing, which may be in part due to the delay between the injury date and PRP injection. PRP injections did not appear to have a significant effect on the likelihood of surgical intervention.

scholarly journals Performance and Return to Sport Following Ulnar Nerve Transposition/Decompression in Professional Baseball Players

2018 ◽  
Vol 6 (7_suppl4) ◽  
pp. 2325967118S0016
Author(s):  
Brandon J. Erickson ◽  
Peter Nissen Chalmers ◽  
John D’Angelo ◽  
Kevin Ma ◽  
Anthony A. Romeo
Keyword(s):  
Ulnar Nerve ◽  
Performance Metrics ◽  
Return To Sport ◽  
Professional Baseball ◽  
Baseball Players ◽  
Nerve Decompression ◽  
Ulnar Nerve Transposition ◽  
Significant Difference ◽  
And Performance ◽  
Nerve Transposition

Background: Isolated ulnar nerve decompression/transposition is an uncommon surgery amongst professional baseball players. Purpose: To determine the rate of return to sport (RTS) and performance upon RTS in professional baseball players following isolated ulnar nerve decompression/transposition, including those who required an ulnar nerve transposition/decompression following ulnar collateral ligament reconstruction (UCLR), and to determine if outcomes differ between players with isolated ulnar nerve decompression/transposition and matched controls. Hypothesis: There is a high rate of RTS in professional baseball players undergoing isolated ulnar nerve decompression/transposition with no significant difference in RTS rate or performance (specifically related to the primary outcome performance variables of earned run average (ERA), WHIP ((walks +hits)/innings pitched), wins above replacement (WAR), and on base + slugging percentage (OPS)) between cases and controls. Methods: All professional baseball players who underwent isolated ulnar nerve decompression/transposition between 2010-2016 were included. Demographic and performance data (pre and post surgery) for each player was recorded. Performance metrics were then compared between cases and a group of matched controls. Results: Overall 52 players, 83% pitchers (14 who underwent prior UCLR) were included. Most surgeries (92%) were anterior subcutaneous transpositions. Overall, 62% of players were able to successfully RTS and 56% returned to the same or a higher level. There was no significant difference between cases and controls in the majority of performance metrics pre-operative or post-operatively, specifically ERA, WHIP, WAR, and OPS. When players who had a UCLR prior to their ulnar nerve transposition/decompression were compared to controls with a history of a UCLR but who did not go on to have an ulnar nerve transposition/decompression, the only performance difference of all the recorded metrics was cases allowed more walks per 9 innings (4.4 vs. 2.8; p=0.011). Conclusion: Anterior subcutaneous transposition is the most common surgery in professional baseball players to address ulnar nerve compression. Players have a 62% rate of RTS. Upon RTS, players performance compared to matched controls remains the same in the majority of performance metrics including ERA, WHIP, WAR, and OPS. Post-operatively, pitchers with a UCLR prior to ulnar nerve transposition/decompression performed the same as matched controls with prior UCLR.

scholarly journals A Comparison of Cardinal Gaze Speed between Major League Baseball Players, Amateur Prospects, and Non-athletes

2020 ◽  
Vol 2 (1) ◽  
pp. e17-e28
Author(s):  
Karla Kubitz ◽  
Claire-Marie Roberts ◽  
Melissa Hunfalvay ◽  
Nicholas Murray
Keyword(s):  
Eye Tracking ◽  
Major League Baseball ◽  
Limited Attention ◽  
Professional Baseball ◽  
Baseball Players ◽  
Significant Difference ◽  
Major League

PurposeSensorimotor variables have been shown to predict performance in professional baseball players. However, cardinal gaze speed in baseball players has received only limited attention. This study tested the hypothesis that the cardinal gaze speed in Major League Baseball (MLB) players would be faster than in amateur prospects and non-athletes. MethodSeventeen MLB athletes, 160 amateur prospects, and 128 non-athletes were tested using an eye-tracking test (i.e., the RightEye CGP test) designed to measure cardinal gaze speed. ResultsMLB players had significantly faster cardinal gaze speed than either amateur prospects or non-athletes. Moreover, there were significant differences in cardinal gaze speed across different directions. ConclusionsThis was the first study to examine the speed of gaze in the cardinal positions in an athletic context. The results highlight the significant difference in cardinal gaze speed between MLB players, amateur prospects, and non-athletes.

scholarly journals Human face structure correlates with professional baseball performance: insights from professional Japanese baseball players

2013 ◽  
Vol 9 (3) ◽  
pp. 20130140 ◽  
Author(s):  
Hikaru Tsujimura ◽  
Michael J. Banissy
Keyword(s):  
Financial Performance ◽  
Professional Baseball ◽  
Human Face ◽  
Sports Performance ◽  
Height Ratio ◽  
Baseball Players ◽  
Daily Lives ◽  
Face Structure ◽  
The Relationship ◽  
Source Of Information

In our daily lives, we use faces as a major source of information about other people. Recent work has begun to highlight how one's facial width-to-height ratio (fWHR) is linked to a number of behaviours (e.g. deception, aggression and financial performance in firms). fWHR has also been linked to several factors that may be beneficial for sport (e.g. achievement drive, winning mentality and aggression). Despite this, few studies have examined the relationship between fWHR and sports performance, and these have focused on Caucasian sportsmen. Here, we investigated the relationship between fWHR and baseball performance in professional Japanese baseball players. We show that fWHR is positively related with home run performance across two consecutive seasons. The findings provide the first evidence linking fWHR to baseball performance and linking fWHR to behavioural outcomes in Asian participants.

Return to Play After Treatment of Superior Labral Tears in Professional Baseball Players

2014 ◽  
Vol 42 (5) ◽  
pp. 1155-1160 ◽  
Author(s):  
Wasyl W. Fedoriw ◽  
Prem Ramkumar ◽  
Patrick C. McCulloch ◽  
David M. Lintner
Keyword(s):  
Return To Play ◽  
Professional Baseball ◽  
Baseball Players ◽  
Labral Tears
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