Adaptation of muscle activity in scapular dyskinesis test for collegiate baseball players

2016 ◽  
Vol 25 (10) ◽  
pp. 1583-1591 ◽  
Author(s):  
Masaaki Tsuruike ◽  
Todd S. Ellenbecker
Keyword(s):  
Muscle Activity ◽  
Scapular Dyskinesis ◽  
Baseball Players ◽  
Collegiate Baseball

scholarly journals Internal Rotation and Scapular Position Differences: A Comparison of Collegiate and High School Baseball Players

2010 ◽  
Vol 45 (1) ◽  
pp. 44-50 ◽  
Author(s):  
Stephen J. Thomas ◽  
Kathleen A. Swanik ◽  
Charles B. Swanik ◽  
John D. Kelly
Keyword(s):  
High School ◽  
Internal Rotation ◽  
Glenohumeral Joint ◽  
External Rotation ◽  
Scapular Dyskinesis ◽  
Position Change ◽  
Baseball Players ◽  
Glenohumeral Internal Rotation Deficit ◽  
Rotator Cuff Injuries ◽  
Collegiate Baseball

Abstract Context: Conditions such as labral and rotator cuff injuries have been linked with decreases in glenohumeral internal-rotation and increases in external-rotation motion. Also, decreased glenohumeral internal rotation is strongly associated with scapular dyskinesis. Objective: To compare healthy collegiate and high school baseball players' glenohumeral joint range of motion and scapular position. Design: Cross-sectional study. Setting: Institutional research laboratory. Patients or Other Participants: Thirty-one male National Collegiate Athletic Association Division I collegiate (age  =  20.23 ± 1.17 years, height  =  186.24 ± 5.73 cm, mass  =  92.01 ± 7.68 kg) and 21 male high school baseball players (age  =  16.57 ± 0.76 years, height  =  180.58 ± 6.01 cm, mass  =  79.09 ± 11.51 kg). Main Outcome Measure(s): Glenohumeral internal and external rotation and scapular upward rotation were measured with a digital inclinometer. Scapular protraction was measured with a vernier caliper. All variables except scapular upward rotation were calculated as the difference between the dominant and nondominant sides. Results: Collegiate baseball players had more glenohumeral internal-rotation deficit (4.80°, P  =  .028) and total motion deficit (5.73°, P  =  .009) and less glenohumeral external-rotation gain (3.00°, P  =  .028) than high school players. Collegiate baseball players had less scapular upward rotation than high school players at the 90° (4.12°, P  =  .015, versus 3.00°, P  =  .025) and 120° (4.00°, P  =  .007, versus 3.40°, P  =  .005) positions. The scapular protraction difference was greater in collegiate baseball players than in high school players in the hands-on-hips and 90° positions (0.77 cm, P  =  .021, and 1.4 cm, P  =  .001). Conclusions: When comparing high school with collegiate baseball players, these data suggest that glenohumeral internal-rotation deficit and scapular position change as the level of competition increases.

Effects of Scapular Kinetic-Chain Exercise on Muscle Activity in Overhead-Pitching Baseball Players

2020 ◽  
Author(s):  
Ki-Jae SONG ◽  
Jin-Ho YOON ◽  
Jae-Keun OH
Keyword(s):  
Muscle Activity ◽  
Muscle Activation ◽  
Coracoid Process ◽  
Scapular Dyskinesis ◽  
Kinetic Chain ◽  
Dominant Group ◽  
Serratus Anterior ◽  
Baseball Players ◽  
Sports Science ◽  
The Mean

Background: We aimed to demonstrate the effect of 8 wk of scapular kinetic-chain exercise on muscle activity in collegiate baseball players diagnosed with scapular dyskinesis. Methods: The subjects were career baseball players with at least a 7-year career assigned into either a SICK (S; scapular malposition, I; inferior border prominence, C; coracoid process pain, K; scapular dyskinesis; n=7) group or a normal group (n=16), respectively. The groups were further divided into SICK-Dominant, SICKNon-Dominant, Normal-Dominant, and Normal-Non-Dominant to examine the dominant and non-dominant deviation of each group. Twenty-three subjects finally recruited through the Sports Science Institute of Korea National Sport University, Seoul, Korea in Sep 2014. Subjects were only allowed drug treatment for acute injuries during matches or training, and matches, training, and diet were controlled by university dormitory life. Results: There was a significant increase in maximal muscular activation (MA) in elevation motion of NormalDominant upper trapezii (UT), mean MA of SICK-Dominant UT, and mean MA of SICK-Dominant lower trapezii (LT) (P<0.05). In depression motion, the mean MAs of SICK-Dominant, Normal-Dominant, and Normal-Non-Dominant UT were significantly increased (P<0.05). The maximal MA of Normal-Dominant LT was significantly increased (P=0.029), and the SICK-Dominant and Normal-Dominant groups showed significantly higher maximal and mean MAs after exercise compared with the Normal-Non-Dominant group (P<0.05). The maximal MA of SICK-Dominant musculi serratus anterior was significantly lower than NormalDominant at pre-test (P=0.034), and the mean MA of SICK-Dominant musculi serratus anterior differed from Normal-Dominant and Normal-Non-Dominant (P<0.05) before testing, but only from Normal-Non-Dominant after testing (P=0.031). Conclusion: Scapular kinetic-chain exercise improved muscle activation in both overhead-pitching players with scapular dyskinesis and normal players.

A bilateral comparison of posterior capsule thickness and its correlation with glenohumeral range of motion and scapular upward rotation in collegiate baseball players

2011 ◽  
Vol 20 (5) ◽  
pp. 708-716 ◽  
Author(s):  
Stephen J. Thomas ◽  
Charles “Buz” Swanik ◽  
Jill S. Higginson ◽  
Thomas W. Kaminski ◽  
Kathleen A. Swanik ◽  
...  
Keyword(s):  
Range Of Motion ◽  
Posterior Capsule ◽  
Baseball Players ◽  
Bilateral Comparison ◽  
Collegiate Baseball ◽  
Capsule Thickness

The Effects of Taping on Muscle Activity and Throwing Velocity in Fatigued Baseball Players

2021 ◽  
Vol 3 (1) ◽  
pp. 18-29
Author(s):  
Kara-Lyn R. Harrison ◽  
Paolo Sanzo ◽  
Carlos Zerpa ◽  
Taryn Klarner
Keyword(s):  
Pilot Study ◽  
Muscle Activity ◽  
Muscle Activation ◽  
Performance Enhancement ◽  
Maximum Velocity ◽  
Baseball Players ◽  
Kinesio Tape ◽  
Significant Difference ◽  
Post Test ◽  
And Performance

Due to the repetitive high forces and torques placed on an individual during a baseball pitch, shoulder pain is present in 46-57% of pitchers. Therapeutic taping has been proposed to have beneficial qualities in injury prevention, rehabilitation, and performance enhancement via muscular facilitation. Therefore, the purpose of this pilot study was to investigate the effect of taping on the velocity of an overhead baseball throw and muscle activation patterning of the supraspinatus, infraspinatus, and pectoralis major muscles in baseball players after muscle fatigue was induced. Participants were asked to complete three pre-test maximum velocity overhead throws, a fatiguing protocol, followed by three post-test maximum velocity pitches. There was no statistically significant difference in throwing velocity or muscle activity with the application of the different taping conditions in the three phases of an overhead baseball throw. These finding suggest Kinesio Tape® does not change muscle activation or velocity of overhead baseball throws when compared to a no tape condition.

Lifetime Prevalence of Pitching-Related Shoulder and Elbow Injuries Among Collegiate Baseball Players

2014 ◽  
Vol 6 (3) ◽  
pp. 105-110 ◽  
Author(s):  
Sakiko Oyama ◽  
Johna K. Register-Mihalik ◽  
Stephen W. Marshall ◽  
Frederick O. Mueller
Keyword(s):  
Lifetime Prevalence ◽  
Baseball Players ◽  
Elbow Injuries ◽  
Collegiate Baseball

Seasonal changes in body composition in collegiate baseball players

2019 ◽  
Vol 30 (3) ◽  
pp. 235-238
Author(s):  
Travis L. Frantz ◽  
Brandon T. Van Matre ◽  
Tyler S. Palmer ◽  
Matthew D. Ruiz
Keyword(s):  
Body Composition ◽  
Seasonal Changes ◽  
Baseball Players ◽  
Collegiate Baseball

scholarly journals Single-Session Video and Electromyography Feedback in Overhead Athletes With Scapular Dyskinesis and Impingement Syndrome

2020 ◽  
Vol 55 (3) ◽  
pp. 265-273
Author(s):  
Wan-Yu Du ◽  
Tsun-Shun Huang ◽  
Yuan-Chun Chiu ◽  
Szu-Jieh Mao ◽  
Li-Wei Hung ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Training Group ◽  
Video Feedback ◽  
Emg Biofeedback ◽  
Scapular Dyskinesis ◽  
Serratus Anterior ◽  
Overhead Athletes ◽  
Feedback Training ◽  
Scapular Kinematics ◽  
Lower Trapezius

Context Subacromial impingement syndrome (SIS) is associated with scapular dyskinesis, or imbalanced scapular muscle activity. Evidence has shown that feedback can improve scapular control in patients with SIS. However, it is unknown whether real-time video feedback or electromyography (EMG) biofeedback is optimal for improving scapular kinematics and muscle activity during a functional task. Objective To compare the effects of video and EMG feedback sessions on absolute muscle activity (upper trapezius [UT], lower trapezius [LT], serratus anterior), muscle balance ratios (UT/LT, UT/serratus anterior), and scapular kinematics (anterior-posterior tilt, external-internal rotation, upward rotation) in SIS participants during arm elevation and lowering. Design Randomized controlled clinical trial. Setting Research laboratory. Patients or Other Participants Overhead athletes who were diagnosed with SIS and who also exhibited scapular dyskinesis (N = 41). Main Outcome Measure(s) Three-dimensional kinematics and EMG were recorded before and after feedback training. Results Lower trapezius muscle activity increased (4.2%–18%, P &lt; .011) and UT/LT decreased (0.56–1.17, P &lt; .013) in the EMG biofeedback training group as compared with those in the video feedback training group. Scapular upward rotation during arm elevation was higher in the video group than in the EMG group after feedback training (2.3°, P = .024). Conclusions The EMG biofeedback improved muscle control and video feedback improved the correction of scapular upward rotation in patients with SIS. Trial Registration Number ClinicalTrials.gov: NCT03252444.

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