scholarly journals The Effect of Shoulder Flexion Angles on the Recruitment of Upper-extremity Muscles during Isometric Contraction

2013 ◽  
Vol 25 (10) ◽  
pp. 1299-1301 ◽  
Author(s):  
Jeheon Moon ◽  
Insik Shin ◽  
Myoungsoo Kang ◽  
Yeonghun Kim ◽  
Kunwoo Lee ◽  
...  
Keyword(s):  
Upper Extremity ◽  
Isometric Contraction ◽  
Shoulder Flexion

scholarly journals Relationship Between Seated Single-Arm Shot Put and Isokinetic Shoulder Flexion and Elbow Extension Strength

2020 ◽  
pp. 1-4
Author(s):  
Matthew D. Watson ◽  
George J. Davies ◽  
Bryan L. Riemann
Keyword(s):  
Upper Extremity ◽  
Test Performance ◽  
Performance Test ◽  
Functional Performance ◽  
Elbow Extension ◽  
Physically Active ◽  
Large Variability ◽  
Shoulder Flexion ◽  
Shot Put ◽  
Strong Relationships

Context: A recent report demonstrated moderate to strong relationships between seated single-arm shot-put (SSASP) test performance and isokinetic pushing forces at varying velocities, directly supporting the SSASP test as a reflection of multijoint upper-extremity strength. Yet, no previous work appears to have assessed whether the SSASP test is more reflective of shoulder flexion or elbow extension strength. Objective: To examine the relationship between isokinetic shoulder flexion and elbow extension strength and SSASP test performance and to compare limb symmetry indices (LSI) between the 2 tests. Design: Correlational design. Setting: Biomechanics laboratory. Patients (or Other Participants): A total of 30 healthy and physically active young adults. Intervention(s): Participants completed the SSASP test and concentric isokinetic (60°/s and 180°/s) shoulder flexion and elbow extension using their dominant and nondominant arms. Main Outcome Measures: SSASP test performance and isokinetic shoulder flexion and elbow extension peak torques as well as LSI between the 2 tests. Results: Strong relationships were observed between SSASP ranges and isokinetic peak torques at each velocity for both shoulder and elbow (r ≥ .804, P < .001). While the Bland–Altman results on the LSI only demonstrated a significant bias for the shoulder (60°/s, P = .009), limits of agreement results demonstrated extremely wide intervals (32.5%–52.1%). Conclusions: The SSASP test is a multijoint upper-extremity functional performance test that is reflective of equal shoulder flexion and elbow extension contributions; however, there was large variability regarding the agreement between the SSASP LSI and isokinetic shoulder and elbow strength LSI.

scholarly journals The effect of smartphone usage on the upper extremity performance among Saudi Youth, KSA

2018 ◽  
Vol 8 (29) ◽  
pp. 47-53 ◽  
Author(s):  
Mohammed Khalid Alruzayhi ◽  
Muath Salman Almuhaini ◽  
Akrm Ibrahem Alwassel ◽  
Osama Mansour Alateeq
Keyword(s):  
Upper Extremity ◽  
External Rotation ◽  
Elbow Flexion ◽  
Pain Scale ◽  
Shoulder Abduction ◽  
Smartphone Addiction ◽  
Awareness Campaign ◽  
Pain Scores ◽  
Shoulder Flexion ◽  
The Impact

Abstract The current study aims to investigate the effect of smartphone usage on the upper extremity performance among Saudi youth. A goniometer to measure the Range of Motion (ROM), the Smartphone Addiction Scale (SAS), McGill Pain scale and Chattanooga stabilizer were used to perform the current study on a sample of 300 university students from Al-Imam Mohammed Bin Saud University. The results have shown that smartphone addiction is negatively correlated to the elbow flexion, shoulder flexion, shoulder extension, shoulder abduction, shoulder adduction, and both shoulder internal and external rotation. Furthermore, the results have shown that McGill pain scores were positively correlated to elbow flexion, shoulder flexion, shoulder extension, shoulder abduction, shoulder adduction, and both shoulder internal and external rotation. The study has concluded that smartphone usage among Saudi youth negatively affects the upper extremity and causes a significant increase in the pain intensity. The study has recommended that there is an urgent need for a significant awareness campaign to warn the community regarding the impact of using smartphones for long periods of time.

Endurance time as a Function of the Percentage of Maximum Voluntary Contraction and Upper Extremity Posture in Healthy Females

2000 ◽  
Vol 44 (30) ◽  
pp. 5-437-5-440
Author(s):  
Arun Garg ◽  
Kurt T. Hegmann
Keyword(s):  
Upper Extremity ◽  
Maximum Voluntary Contraction ◽  
Voluntary Contraction ◽  
Flexion Angle ◽  
Endurance Time ◽  
Shoulder Flexion ◽  
Healthy Females ◽  
Female Subjects

Endurance times were measured on 12 female subjects for seven different %MVCs and five different shoulder postures. Endurance time decreased nonlinearly with an increase in %MVC. It decresed with an increase in shoulder flexion angle up to 120° and then it increased. This study does not support the recommendation that weights corresponding to 5% of MVC, much less 20% of MVC as suggested by Rohmert, can be held indefinitely.

scholarly journals Correlation between Shoulder Range of Motion, Upper Extremity Disability and Quality of Life in Female Breast Cancer Survivors Post Modified Radical Mastectomy: A Pilot Study

2021 ◽  
Vol 6 (3) ◽  
pp. 120-126
Author(s):  
Priya S. ◽  
Shenoy Kamalaksha K ◽  
Trusha Pushkar Kulkarni
Keyword(s):  
Breast Cancer ◽  
Quality Of Life ◽  
Cancer Survivors ◽  
Upper Extremity ◽  
Breast Cancer Survivors ◽  
Radical Mastectomy ◽  
Modified Radical Mastectomy ◽  
Positive Correlation ◽  
Shoulder Flexion

Background: Many complications may occur after modified radical mastectomy (MRM) such as restricted shoulder mobility, wound infection, seroma formation, pain and lymph edema. Purpose: To find the correlation between shoulder flexion and abduction range of motion (ROM) with upper extremity disability and quality of life in female post MRM. Methodology: A cross section observation study was conducted in a tertiary care hospital. A total of 20 breast cancer survivors who underwent MRM before 6 months or more were included. Their affected side shoulder flexion and abduction ROM was measured using universal goniometer, upper extremity disability was assessed using Upper Extremity Functional Index (UEFI) and Quality of Life was assessed using WHOQoL-BREF questionnaire. Results: Karl Pearson’s correlation coefficient was used to find the correlation. Strong positive correlation was found between shoulder flexion ROM and UEFI score, physical, psychological and environmental domains, whereas moderate positive correlation was found between shoulder flexion ROM and overall QoL, these were statistically significant (p<0.001). But there was weak positive correlation found between shoulder flexion ROM and social domain of WHOQoL-BREF which was statistically not significant (p>0.001). Further strong positive correlation was found between shoulder abduction ROM and UEFI score, overall Qol, physical and psychological domain and moderate positive correlation was found between shoulder abduction ROM and environmental domain whereas again weak positive correlation found with social domain which was statistically not significant (p>0.001). Conclusion: Decreased shoulder ROM can increase upper extremity disability and affect overall QoL in breast cancer survivors post MRM. Keywords: Breast cancer survivors, Modified Radical Mastectomy, Quality of Life, Shoulder ROM, Upper extremity disability.

Effects of Trunk Restraint Combined With Intensive Task Practice on Poststroke Upper Extremity Reach and Function: A Pilot Study

2008 ◽  
Vol 23 (1) ◽  
pp. 78-91 ◽  
Author(s):  
Michelle L. Woodbury ◽  
Dena R. Howland ◽  
Theresa E. McGuirk ◽  
Sandra B. Davis ◽  
Claudia R. Senesac ◽  
...  
Keyword(s):  
Upper Extremity ◽  
Elbow Flexion ◽  
Elbow Extension ◽  
Trunk Motion ◽  
Assessment Scores ◽  
Trunk Movements ◽  
Shoulder Flexion ◽  
Anterior Trunk ◽  
Task Practice ◽  
And Function

Background. Poststroke reaching is characterized by excessive trunk motion and abnormal shoulder—elbow coordination. Little attention is typically given to arm—trunk kinematics during task practice. Preventing compensatory trunk motion during short-term practice immediately improves kinematics, but effects of longer-term practice are unknown. Objective. This study compared the effects of intensive task practice with and without trunk restraint on poststroke reaching kinematics and function. Methods. A total of 11 individuals with chronic stroke, baseline Fugl-Meyer Upper Extremity Assessment scores 26 to 54, were randomized to 2 constraint-therapy intervention groups. All participants wore a mitt on the unaffected hand for 90% of waking hours over 14 days and participated in 10 days/6 hours/day of supervised progressive task practice. During supervised sessions, one group trained with a trunk restraint (preventing anterior trunk motion) and one group did not. Tasks for the trunk-restraint group were located to afford repeated use of a shoulder flexion—elbow extension reaching pattern. Outcome measures included kinematics of unrestrained targeted reaching and tests of functional arm ability. Results. Posttraining, the trunk-restraint group demonstrated straighter reach trajectories ( P = .000) and less trunk displacement ( P = .001). The trunk-restraint group gained shoulder flexion ( P = .006) and elbow extension ( P = .022) voluntary ranges of motion, the nonrestraint group did not. Posttraining angle—angle plots illustrated that individuals from the trunk-restraint group transitioned from elbow flexion to elbow extension during mid-reach; individuals in the nonrestraint group retained pretraining movement strategies. Both groups gained functional arm ability ( P < .05 all tests). Conclusion. Intensive task practice structured to prevent compensatory trunk movements and promote shoulder flexion—elbow extension coordination may reinforce development of “normal” reaching kinematics.

scholarly journals Sensors for Wheelchair Tennis: Measuring Trunk and Shoulder Biomechanics and Upper Extremity Vibration during Backhand Stroke

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6576
Author(s):  
Yan-Ying Ju ◽  
Wan-Ting Chu ◽  
Wann-Yun Shieh ◽  
Hsin-Yi Kathy Cheng
Keyword(s):  
Angular Velocity ◽  
Upper Extremity ◽  
External Rotation ◽  
Lower Limbs ◽  
Electromagnetic System ◽  
Tennis Players ◽  
Deceleration Phase ◽  
Shoulder Flexion ◽  
Acceleration And Deceleration ◽  
Shoulder Kinematics

This study was the first to compare the differences in trunk/shoulder kinematics and impact vibration of the upper extremity during backhand strokes in wheelchair tennis players and the able-bodied players relative to standing and sitting positions, adopting an electromagnetic system along with wearable tri-axial accelerometers upon target body segments. A total of 15 wheelchair tennis players and 15 able-bodied tennis players enrolled. Compared to players in standing positions, wheelchair players demonstrated significant larger forward trunk rotation in the pre-preparation, acceleration, and deceleration phase. Significant higher trunk angular velocity/acceleration and shoulder flexion/internal rotation angular velocity/acceleration were also found. When able-bodied players changed from standing to sitting positions, significant changes were observed in the degree of forward rotation of the trunk and shoulder external rotation. These indicated that when the functions of the lower limbs and trunk are lacking or cannot be used effectively, “biomechanical solutions” such as considerable reinforcing movements need to be made before the hitting movement. The differences between wheelchair tennis players and able-bodied players in sitting positions could represent the progress made as the wheelchair players evolve from novices to experts. Knowledge about how sport biomechanics change regarding specific disabilities can facilitate safe and inclusive participation in disability sports such as wheelchair tennis.

Shoulder Flexion Torque Is Augmented by a Volitional Abdominal Isometric Contraction

2019 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Paul A. Cacolice ◽  
Christopher R. Carcia ◽  
Jason S. Scibek
Keyword(s):  
Isometric Contraction ◽  
Shoulder Flexion
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