Evaluation of a four-week Adjunct Compensatory Training for the treatment of climbing-specific overstrain syndromes of the shoulder

2022 ◽  
Author(s):  
Laura Sofie Grohnert ◽  
Marcellus Bonato ◽  
Volker Schöffl
Keyword(s):  
Range Of Motion ◽  
External Rotation ◽  
Rehabilitation Program ◽  
Training Methods ◽  
Shoulder Injuries ◽  
Constant Murley Score ◽  
Zero Position ◽  
Shoulder Flexion ◽  
Before And After

Abstract Background Although climbing is an increasingly popular sport, there is a lack of scientific evaluation of suitable training methods for climbers, especially with a view to prevention and rehabilitation. A specific rehabilitation program, Adjunct Compensatory Training (ACT), has recently been presented, but it has not been evaluated scientifically to date. Objective To investigate the effects of Adjunct Compensatory Training on climbing-specific overstrain syndromes of the shoulder. Methods Twenty active boulderers and climbers with an average age of 28.9 (± 7.4) years performed a guided shoulder program of six specific exercises from the ACT program over a period of four weeks. They were examined before and after the intervention. Pre- and post-interventional measurements included the Constant-Murley Score, the QuickDASH Score and the measurement of shoulder ROM (range of motion). Results The Constant-Murley Score increased from 82 (± 10.0) to 104.1 (± 8.2) at follow-up (p < 0.001). The VAS value for bouldering and climbing decreased from 5.25 (± 1.4) before to 2.4 (± 1.6) after the intervention (p < 0.001). Shoulder flexion increased from 167.5 (± 14.9) to 173.1 (± 7.7) after the intervention (p < 0.05), abduction from 172.5 (± 14.9) to 179.6 (± 5.9) (n. s.), external rotation from neutral zero position from 77.6 (± 16.8) to 86.3 ± (8.3) (p < 0.05). Feasibility and acceptance of the intervention were good. Ninety-five percent of the participants continued to exercise, and 100 percent recommended the program to others. Conclusion The ACT led to an improvement in pain, activities of daily living, range of motion and strength in boulderers and climbers with overstrain symptoms of the shoulder. It is also classified as a realistically feasible workout. The extent to which this effect will continue, and whether or not the program can prevent injuries, remains to be seen. It can only be presumed that regular exercises prevent shoulder injuries in the climbing population.

scholarly journals Selective Glenohumeral external rotation deficit – sequelae of post-ORIF deltoid adhesions after treatment of the proximal humerus fracture

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Michał Waszczykowski ◽  
Jarosław Fabiś
Keyword(s):  
Range Of Motion ◽  
Proximal Humerus Fracture ◽  
Proximal Humerus ◽  
External Rotation ◽  
Shoulder Function ◽  
Humerus Fracture ◽  
Plate Removal ◽  
Special Regard ◽  
Constant Murley Score

Abstract Background The deltopectoral approach is commonly used for plate stabilization of proximal humerus fracture. Although adhesions between the deltoid, plate, and humerus are common sequelae of plate ORIF, little is known about their effect on the range of movement and a function of the shoulder. To confirm their impact, the preoperative and intraoperative evaluation of the range of motion (ROM) was measured during the sequential arthroscopic release of adhesions, with special regard to external rotation. Postoperative ROM and subjective shoulder function were also evaluated. Methods Eighteen patients treated with ORIF of the proximal humerus were scheduled to the unified arthroscopic procedures comprising sequential limited subacromial bursectomy, removal of the adhesions between the deltoid, plate, and humerus, as well as the plate removal. The ROM of the operated and opposite shoulders were assessed before surgery, intraoperatively and after a minimum two-year follow-up, with special regard to external rotation in adduction (AddER) and abduction (AbdER). Besides, the Constant-Murley score and Subjective Shoulder Value (SSV) were evaluated before a plate removal and after a minimum two-year follow-up after the surgery. Results Deltoid adhesion release correlated with considerable and statistically significant improvement of AddER (p < 0.0002) but not with the intraoperative range of AbdER. Significant improvement of AddER, but also of AbdER and other range of motion was noted at the follow-up. The improvement of the affected shoulder function following arthroscopic plate removal was considerable and statistically significant according to the modified Constant-Murley score (p < 0,01) and SSV (p < 0.0000) after a minimum of two-year follow-up. Conclusions Our findings are the first to highlight the influence of deltoid muscle, plate, and humerus adhesions on limiting external rotation in adduction after ORIF treatment of proximal humerus fractures. These observations allow the identification of a new shoulder evaluation symptom: Selective Glenohumeral External Rotation Deficit (SGERD) as well as functional deltohumeral space.

EFEITOS DO DEEP RUNNING SOBRE A AMPLITUDE DE MOVIMENTO E A CAPACIDADE FUNCIONAL DOS MEMBROS SUPERIORES DE MULHERES MASTECTOMIZADAS: RELATO DE CASOS

2019 ◽  
pp. 121-131
Keyword(s):  
Range Of Motion ◽  
Upper Limb ◽  
Functional Capacity ◽  
External Rotation ◽  
Treatment Protocol ◽  
Range Of Movement ◽  
Flexion Extension ◽  
Before And After ◽  
In The Beginning ◽  
And Function

Introduction: Breast cancer is the most common type of cancer among women in Brazil and in the worl. The surgical treatment procedure may cause severe morbidity in the upper limb homolateral to surgery, including the reduction of the range of motion, with consequent impairment of function. A physiotherapeutic approach has an important role in the recover range of motion and the functionality of these women, guaranteeing the occupational, domestestic, familiar and conjugated activities, and, in this way, also improving the quality of life. Objectives: To analyse chances in the shoulder's range of motion and the functional capacity of the upper limbs, promoted by the deep running procedure in women with late postoperative mastectomy. Methods: All the patients were submitted to an evaluation in the beginning and end of the treatment, including: goniometry of flexion, extension, abduction, adduction, internal and external rotation of the shoulder joint; and function capacity analysis in activities that involve the upper members by DASH questionnaire. The treatment protocol includes twelve sessions of deep running, realized twice a week, in deep pool, for 20-minute during six weeks. Results: Were submitted to treatment a total of 4 patients. Despite the improvement in the numerical values, statistically significant differences were not found on the range of movements and in the functional capacity of upper members before and after the deep running sessions in post-mastectomy women. Conclusion: Deep running had effects on the numerical values of range of movement and upper limb functionality in women in the late postoperative period of the mastectomy procedure, but without statistically significant differences.

Effectiveness of arthroscopic management of idiopathic shoulder stiffness: A meta-analysis

2021 ◽  
pp. 1-8
Author(s):  
Ya-Dong Wang ◽  
Yu-Xiang Ming ◽  
Yong-Hua Pang ◽  
Wei-Nan Chen ◽  
Xu-Hua Zong ◽  
...  
Keyword(s):  
Range Of Motion ◽  
External Rotation ◽  
Meta Analysis ◽  
Eligibility Criteria ◽  
Shoulder Stiffness ◽  
Capsular Release ◽  
Shoulder Range Of Motion ◽  
Arthroscopic Capsular Release ◽  
Shoulder Range

BACKGROUND: Persisting shoulder stiffness adversely affects quality of life by causing pain and motion restrictions especially in patients with diabetes. OBJECTIVE: The aim of this study was to evaluate the outcomes of arthroscopic capsular release in patients with idiopathic shoulder stiffness. METHOD: A literature search was conducted in electronic databases and studies were selected by following precise eligibility criteria. Random-effects meta-analyses were performed to estimate the changes at latest follow-up in scores of the Constant, American Shoulder and Elbow Surgeons (ASES), and University of California at Los Angelis (UCLA) scales, Visual Analogue Scale (VAS), and shoulder range of motion. RESULTS: Nineteen studies were included. The follow-up duration was 42 months [95% confidence interval (CI): 32, 51]. Improvements in scores of the Constant, ASES, UCLA scales, and VAS were 48.3 [95% CI: 38.0, 58.6], 44.6 [95% CI: 24.6, 64.6], 19.3 [95% CI: 16.6, 22.0], and -6.1 [95% CI: -6.9, -5.4] respectively (P< 0.05 all). Improvements in the shoulder range of motion were: abduction 82.0 [95% CI: 65.0, 98.9]; forward flexion 75.9 [95% CI: 59.7, 92.1]; external rotation 43.2 [95% CI: 37.5, 49.0]; and internal rotation 25.4 [95% CI: 15.2, 35.5] degrees; P< 0.05 all). CONCLUSION: Arthroscopic capsular release effectively improves shoulder function in patients with idiopathic shoulder stiffness.

Evaluating the Outcomes of Rotator Cuff Repairs With Polytetrafluoroethylene Patches for Massive and Irreparable Rotator Cuff Tears With a Minimum 2-Year Follow-up

2018 ◽  
Vol 46 (13) ◽  
pp. 3155-3164 ◽  
Author(s):  
Vasanth Seker ◽  
Lisa Hackett ◽  
Patrick H. Lam ◽  
George A.C. Murrell
Keyword(s):  
Rotator Cuff ◽  
Range Of Motion ◽  
External Rotation ◽  
Case Series ◽  
Shoulder Function ◽  
Rotator Cuff Tears ◽  
Level Of Evidence ◽  
Irreparable Tear ◽  
Pain At Rest

Background: Massive and irreparable rotator cuff tears are difficult to manage surgically. One technique is to use a synthetic polytetrafluoroethylene (PTFE) patch to bridge the tear. However, there is little information regarding the outcomes of this procedure. Purpose: To determine the ≥2-year outcomes of patients for whom synthetic patches were used as tendon substitutes to bridge irreparable rotator cuff defects. Study Design: Case series; Level of evidence, 4. Methods: This retrospective cohort study used prospectively collected data. Patients included those with a synthetic patch inserted as an interposition graft for large and/or irreparable rotator cuff tears with a minimum 2-year follow-up. Standardized assessment of shoulder pain, function, range of motion, and strength was performed preoperatively, at 6 and 12 weeks, and at 6 months and ≥2 years. Radiograph and ultrasound were performed preoperatively, at 6 months, and ≥2 years. Results: At a mean of 36 months, 58 of 68 eligible patients were followed up, and 53 of 58 (90%) patches remained in situ. Three patches failed at the patch-tendon interface, while 1 patient (2 shoulders/patches) went on to have reverse total shoulder replacements. Patient-ranked shoulder stiffness ( P < .001), frequency of pain with activity and sleep ( P < .0001), level of pain at rest and overhead ( P < .0001), and overall shoulder function improved from bad to very good ( P < .0001) by 6 months. Supraspinatus (mean ± SEM: 29 ± 16 N to 42 ± 13 N) and external rotation (39 ± 13 N to 59 ± 15 N) strength were the most notable increases at the ≥2-year follow-up ( P < .0001). Passive range of motion also improved by 49% to 67%; forward flexion, from 131° to 171°; abduction, from 117° to 161°; external rotation, from 38° to 55°; and internal rotation, from L3 to T10 ( P < .0001) preoperatively to ≥2 years. The most improvement in passive range of motion occurred between 12 months and ≥2 years. The mean (SD) Constant-Murley score was 90 (12), while the American Shoulder and Elbow Surgeons score was 95 (8). Conclusion: At 36 months postoperatively, patients who had synthetic patches used as tendon substitutes to bridge irreparable rotator cuff defects reported less pain and greater overall shoulder function as compared with preoperative assessments. They demonstrated improved range of passive motion and improved strength. The data support the hypothesis that the technique of using a synthetic PTFE patch to bridge a large and/or irreparable tear has good construct integrity and improves patient and clinical outcomes.

Upper Extremity and Hip Range of Motion Changes Throughout a Season in Professional Baseball Players

2019 ◽  
Vol 48 (2) ◽  
pp. 481-487
Author(s):  
Justin M. Chan ◽  
John Zajac ◽  
Brandon J. Erickson ◽  
David W. Altchek ◽  
Christopher Camp ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Range Of Motion ◽  
External Rotation ◽  
Significant Risk ◽  
Case Series ◽  
Significant Risk Factor ◽  
Professional Baseball ◽  
Level Of Evidence ◽  
Baseball Players ◽  
Shoulder Flexion

Background: Loss of upper and lower extremity range of motion (ROM) is a significant risk factor for injuries in professional baseball players. Purpose/Hypothesis: The purpose was to determine changes in ROM in professional baseball players over the course of a single season and their careers. We hypothesized that pitchers and position players would lose ROM, specifically total shoulder motion (total ROM [TROM]) and hip internal rotation (IR), over the course of a season and their careers. Study Design: Case series; Level of evidence, 4. Methods: Upper and lower extremity ROM measurements were recorded during pre-, mid-, and postseason on all professional baseball players for a single organization between 2011 and 2018. ROM measurements were compared for pitchers and position players over the course of the season and their careers. Also, ROM measurements over the pre-, mid-, and postseason were compared between pitchers and position players. Results: A total of 166 professional baseball players (98 pitchers, 68 position players) were included. Pitcher hip external rotation (ER; P < .001), IR ( P = .010), and TROM ( P < .001) for lead and trail legs decreased over the course of the season. Pitcher shoulder ER ( P = .005), TROM ( P = .042), and horizontal adduction ( P < .001) significantly increased over the course of the season. Position player shoulder flexion ( P = .046), hip ER ( P < .001, lead leg; P < .001, trail leg), and hip TROM ( P = .001; P = .002) decreased over the course of the season. Position player shoulder ER ( P = .031) and humeral adduction ( P < .001) significantly increased over the course of the season. Over the course of pitchers’ careers, there was decreased shoulder IR ( P = .014), increased shoulder horizontal adduction ( P < .001), and hip IR ( P = .042) and hip TROM ( P = .027) for the lead leg. Position players experienced loss of hip TROM ( P = .010, lead leg; P = .018, trail leg) over the course of their careers. Pitchers started with and maintained more shoulder ER and gained more shoulder TROM over a season as compared with position players. Conclusion: Pitchers and position players saw overall decreases in hip ROM but increases in shoulder ROM over the course of the season and career.

scholarly journals Arthroscopic fixation of humeral greater tuberosity fracture using a W-shaped suture

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Xiaocong Lin ◽  
Xiuxi Huang ◽  
Kaibin Fang ◽  
Zhangsheng Dai
Keyword(s):  
Internal Fixation ◽  
Range Of Motion ◽  
Shoulder Arthroscopy ◽  
Healing Time ◽  
Fixation Failure ◽  
Greater Tuberosity ◽  
Vas Score ◽  
Constant Murley Score ◽  
Significant Difference

Abstract Background Patients with greater tuberosity fractures of the humerus often require surgery. Therefore, there is a need to find a minimally invasive and effective surgical procedure with great patient outcomes. Aim To evaluate the clinical outcomes of the W-shaped suture technique under shoulder arthroscopy in the treatment of greater tuberosity fractures of the humerus. Methods In this retrospective study, a total of 17 patients were included. The fractures were closed, and there was no neurovascular injury. These patients underwent arthroscopically assisted reduction and internal fixation of the greater tuberosity fractures. Fixation was performed using sighting nails combined with a W-shaped suture. The imaging data of the patients were collected, and the ASES score, Constant-Murley score, and VAS score were used to evaluate the patient’s outcome. At the last follow-up (at least 1 year), the range of motion in the affected shoulder was compared with that of the contralateral side. Results The operation was successful in all the patients. The average follow-up time was 13 months. There were no reported complications such as fracture displacement, nonunion, and internal fixation failure during the follow-up period. Post-operative X-ray examinations revealed good function recovery, with a healing time of between 10 and 12 weeks, and an average healing time of 11.5 weeks. Following the operation, patients reported reduced shoulder joint pain that no longer influenced their activity or caused discomfort in their daily life. The patient’s VAS score ranged from 0 to 3, with an average of 0.52 ± 0.73, while at the last follow-up, the Constant-Murley score ranged from 83 to 97, with an average of 92.33 ± 7.55. The ASES score ranged from 81 to 98, with an average of 93.15 ± 6.93. At the last follow-up, there was no significant difference in the overall range of motion with the unaffected limb. Conclusion This study demonstrates that the W-shaped suture can be used to effectively fix the fractures of the greater tuberosity of the humerus, by increasing the fixed area to promote healing.

Infraspinatus Cross-Sectional Area and Shoulder Range of Motion Change Following Live-Game Baseball Pitching

2019 ◽  
Vol 28 (3) ◽  
pp. 236-242 ◽  
Author(s):  
Brett S. Pexa ◽  
Eric D. Ryan ◽  
Elizabeth E. Hibberd ◽  
Elizabeth Teel ◽  
Terri Jo Rucinski ◽  
...  
Keyword(s):  
Range Of Motion ◽  
Athletic Training ◽  
Repeated Measures ◽  
External Rotation ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Cross Sectional ◽  
Shoulder Range Of Motion ◽  
Posterior Shoulder ◽  
Before And After

Context: Following a baseball pitching bout, changes can occur to glenohumeral range of motion that could be linked to injury. These effects are in part due to the posterior shoulder’s eccentric muscle activity, which can disrupt muscle contractile elements and lead to changes in muscle cross-sectional area (CSA), as measured by ultrasound. Objective: To assess changes in muscle CSA, and range of motion immediately before and after pitching, and days 1 to 5 following pitching. Design: Repeated measures. Setting: Satellite athletic training room. Patients: Ten elite college baseball pitchers participating in the fall season (age: 18.8 [1.2] y, height: 189.2 [7.3] cm, mass: 93.1 [15.3] kg, 8 starters, 2 long relievers). Intervention: A pitching bout of at least 25 pitches (63.82 [17.42] pitches). Main Outcome Measures: Dominant and nondominant infraspinatus CSA, as measured by ultrasound, and glenohumeral range of motion including internal rotation (IRROM), external rotation (ERROM), and total rotation range of motion (TROM) before pitching, after pitching, and days 1 to 5 following the pitching bout. Results: Dominant limb CSA significantly increased day 1 after pitching, and returned to baseline on day 2 (P < .001). Dominant and nondominant TROM did not change until day 5 (4.4°, P < .001) and day 3 (4.5°, P < .001), respectively, where they increased. Dominant IRROM was significantly decreased for 3 days (day 1: 1.9°, P < .001; day 2: 3.1°, P < .001; day 3: 0.3°, P < .001) following pitching and returned to baseline on day 4, with no such changes in the nondominant limb. Dominant external rotation significantly increased immediately post pitching (4.4°, P < .001) but returned to baseline by day 1. Conclusions: The results of the study demonstrate that infraspinatus CSA does not recover until 2 days following pitching, and IRROM does not recover until 4 days following pitching. Baseball pitching elicits damage to the posterior shoulder muscle architecture, resulting in changes to physical characteristics that last up to 4 days following pitching.

Modified Ilizarov technique for the treatment of forearm deformities in multiple cartilaginous exostoses: case series and literature review

2012 ◽  
Vol 38 (3) ◽  
pp. 288-296 ◽  
Author(s):  
S. H. Song ◽  
H. Lee ◽  
H. Youssef ◽  
S. M. Oh ◽  
J. H. Park ◽  
...  
Keyword(s):  
Range Of Motion ◽  
Functional Status ◽  
Corrective Osteotomy ◽  
Case Series ◽  
Ilizarov Method ◽  
Ilizarov Technique ◽  
Before And After ◽  
The Mean ◽  
Multiple Cartilaginous Exostoses

The aim of this study is to evaluate the results of gradual ulnar correction and lengthening using the modified Ilizarov technique for the treatment of forearm deformities in patients with multiple cartilaginous exostoses. We retrospectively reviewed 23 forearms in 16 patients. Three different types of operative procedures were performed: (1) corrective osteotomy and gradual lengthening of the ulna, (2) corrective osteotomy of the radius, and (3) excision of exostoses. We evaluated the radiographs; range of motion of the wrist, forearm, and elbow; and functional status using a questionnaire before and after operation. During the clinical interview, post-operative functional status was significantly improved than pre-operative functional status, 12 patients stated that they had no difficulty in performing daily activities, 11 patients stated that they had no pain, and 11 patients stated that the post-operative appearance of the operated forearm was satisfactory. At time of final follow-up, the mean range of motion of the wrist in ulnar/radial deviation, forearm pronation/supination was significantly improved. Also, the radiographic parameters including radial articular angle, carpal slip, radial bowing, and ulnar variance were significantly improved at time of final follow-up. In conclusion, we achieved successful clinical and radiological outcomes in our patients with forearm deformities after treatment with the modified Ilizarov method. However, there could be a recurrence of ulnar shortening and deformity during growth periods in skeletally immature patients.

scholarly journals A Randomized Controlled Single-Blinded Comparison of Stretching Versus Stretching and Joint Mobilization for Posterior Shoulder Tightness Measured by Internal Rotation Motion Loss

2009 ◽  
Vol 2 (2) ◽  
pp. 94-100 ◽  
Author(s):  
Robert C. Manske ◽  
Matt Meschke ◽  
Andrew Porter ◽  
Barbara Smith ◽  
Michael Reiman
Keyword(s):  
Range Of Motion ◽  
Internal Rotation ◽  
External Rotation ◽  
Rehabilitation Program ◽  
Intervention Period ◽  
Joint Mobilization ◽  
Randomized Controlled ◽  
Posterior Shoulder ◽  
Rotation Motion ◽  
Posterior Shoulder Tightness

Background: Posterior shoulder tightness, as demonstrated by limited internal rotation range of motion, is a suggested factor in many shoulder pathologies. Methods to increase posterior shoulder mobility may be beneficial. Hypothesis: Shoulder internal rotation range of motion will not change with either of 2 interventions: cross-body stretch alone and cross-body stretch plus posterior capsule joint mobilization. Study Design: Randomized controlled single-blinded clinical trial. Methods: The study comprised 39 college-age asymptomatic participants (7 men, 32 women) who were randomly assigned to 1 of 2 groups: stretching only (n, 20) and stretching plus posterior joint mobilizations (n, 19). All had a between-shoulder difference of internal rotation of 10° or more. Shoulder internal and external rotation was measured before and after a 4-week intervention period and 4 weeks postintervention. Participants in the stretching-only group performed the cross-body stretch on the limited side. Those in the other group (cross-body stretch plus joint mobilization) were treated with posterior joint mobilization techniques on the limited side. Results: Overall means for internal rotation of the treated shoulders significantly increased over baseline at the end of the intervention period and at 4 weeks postintervention. External rotation in all shoulders remained unchanged. By the end of intervention, total motion increased significantly from baseline but decreased significantly from the end of intervention to 4 weeks postintervention. Although not statistically significant, the second group (cross-body stretch plus joint mobilization) had greater increases in internal rotation. At 4 weeks postintervention, the second group had maintained its internal rotation gains to a greater degree than those of the stretching-only group. Conclusion: Internal rotation increased in both groups. Inclusion of joint mobilization in a rehabilitation program created trends toward increased shoulder internal rotation mobility. Clinical Relevance: Both methods—cross-body stretch and cross-body stretch plus joint mobilization—may be beneficial for those with limited internal rotation range of motion.

scholarly journals Shoulder-Rotator Strength, Range of Motion, and Acromiohumeral Distance in Asymptomatic Adolescent Volleyball Attackers

2016 ◽  
Vol 51 (9) ◽  
pp. 733-738 ◽  
Author(s):  
Gulcan Harput ◽  
Hande Guney ◽  
Ugur Toprak ◽  
Tunca Kaya ◽  
Fatma Filiz Colakoglu ◽  
...  
Keyword(s):  
Range Of Motion ◽  
High Performance ◽  
Glenohumeral Joint ◽  
External Rotation ◽  
Cross Sectional Study ◽  
Shoulder Injuries ◽  
Adolescent Athletes ◽  
Cross Sectional ◽  
Acromiohumeral Distance ◽  
External Rotator

Context: Sport-specific adaptations at the glenohumeral joint could occur in adolescent athletes because they start participating in high-performance sports in early childhood. Objective: To investigate shoulder-rotator strength, internal-rotation (IR) and external-rotation (ER) range of motion (ROM), and acromiohumeral distance (AHD) in asymptomatic adolescent volleyball attackers to determine if they have risk factors for injury. Design: Cross-sectional study. Setting: University laboratory. Participants: Thirty-nine adolescent high school-aged volleyball attackers (22 boys, 17 girls; age = 16.0 ± 1.4 years, height = 179.2 ± 9.0 cm, mass = 67.1 ± 10.9 kg, body mass index = 20.7 ± 2.6 kg/m2). Main Outcome Measure(s): Shoulder IR and ER ROM, total-rotation ROM, glenohumeral IR deficit, AHD, and concentric and eccentric strength of the shoulder internal and external rotators were tested bilaterally. Results: External-rotation ROM was greater (t38 = 4.92, P &lt; .001), but IR ROM (t38 = −8.61, P &lt; .001) and total ROM (t38 = −3.55, P = .01) were less in the dominant shoulder, and 15 athletes had a glenohumeral IR deficit (IR ROM loss &gt; 18°). We observed greater concentric internal-rotator (t38 = 2.89, P = .006) and eccentric external-rotator (t38 = 2.65, P = .01) strength in the dominant than in the nondominant shoulder. The AHD was less in the dominant shoulder (t38 = −3.60, P &lt; .001). Conclusions: Adolescent volleyball attackers demonstrated decreased IR ROM, total ROM, and AHD and increased ER ROM in their dominant shoulder. Therefore, routine screening of adolescent athletes and designing training programs for hazardous adaptive changes could be important in preventing shoulder injuries.

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