Selective Activation of the Infraspinatus During External Rotation Exercises in Participants With Rounded Shoulder Posture

Selective Activation of the Infraspinatus During External Rotation Exercises in Participants With Rounded Shoulder Posture: Comparison of 3 Common Exercises and Muscle Architecture-Based Exercise

The purpose of this prospective, cross-sectional study was to evaluate the selective activation of the infraspinatus during external rotation exercises in participants with rounded shoulder postures and compare the different exercise positions. The fifteen (7 males and 8 females) participants with rounded shoulder posture were recruited for this study. The EMG activations of the middle trapezius, posterior deltoid and infraspinatus muscles in the dominant limb were recorded during exercises in standing external rotation (SER), side-lying position (SDER), scapular plane (SPER) and muscle architecture-based (MABER) positions.

Study Overview

• Status: Completed
• Conditions: Shoulder Disease
• Intervention / Treatment: Device: The EMG activations

• Study Type: Observational
• Enrollment (Actual): 15

Contacts and Locations

Study Locations

• Turkey
  • Etlik
    • Ankara, Etlik, Turkey, 06010
      • Ankara Yıldırım Beyazıt University, Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

• Sampling Method: Probability Sample

Study Population

Fifteen (7 males and 8 females) participants without shoulder pain, totally able to perform overhead activities with no pain or discomfort, without a history of shoulder injuries, and with rounded shoulder posture were recruited for this study.

Description

Inclusion Criteria:

• without shoulder pain,
• totally able to perform overhead activities with no pain or discomfort,
• without a history of shoulder injuries
• with rounded shoulder posture

Exclusion Criteria:

• a history of shoulder muscle injury
• bone fractures in shoulder region
• luxation or subluxation
• cervical dysfunction radiating to upper limbs
• neurologic or musculoskeletal disorders that would prevent shoulder external rotation in the testing postures.

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
The EMG activations of the middle trapezius, posterior deltoid and infraspinatus muscles in the dominant limb	The EMG activations of the middle trapezius, posterior deltoid and infraspinatus muscles in the dominant limb were recorded during exercises in standing external rotation (SER), side-lying position (SDER), scapular plane (SPER) and muscle architecture-based (MABER) positions	4 weeks

Collaborators and Investigators

• Sponsor: Ankara Yildirim Beyazıt University

Study record dates

Study Major Dates

• Study Start (Actual): July 15, 2023
• Primary Completion (Actual): July 20, 2023
• Study Completion (Actual): July 30, 2023

Study Registration Dates

• First Submitted: October 1, 2023
• First Submitted That Met QC Criteria: October 1, 2023
• First Posted (Actual): October 6, 2023

Study Record Updates

• Last Update Posted (Actual): October 6, 2023
• Last Update Submitted That Met QC Criteria: October 1, 2023
• Last Verified: October 1, 2023

More Information

Terms related to this study

• Keywords: Infraspinatus; Muscle architecture; Rounded Shoulder Posture; Superficial EMG
• Other Study ID Numbers: 38b5558f4bdd45f8

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No