Electromyographic Analysis of Scapular Muscles During Closed Kinetic Chain Exercises

NCT06274827 | Completed DMC

• 1 other identifier: GO 22- 881
• Study Type: interventional
• Target: 22
• Locations: 1 country
• Sites: 1

Brief Summary

In shoulder rehabilitation, the inclusion of kinetic chain exercises is advocated in order to provide the necessary energy transfer to produce optimal force with minimal energy consumption. Closed kinetic chain (CKC) exercises are defined as exercises in which the distal segment is stabilized by encountering significant resistance while the proximal segment moves. In contrast, open kinetic chain (OKC) exercises allow the distal segment to move freely without any resistance. Recently, the importance of closed kinetic chain (CKC) exercises has increased in enhancing shoulder joint neuromuscular control by improving dynamic shoulder stability and joint position sense. The most current shoulder rehabilitation protocols include exercises for restoration of scapular muscle imbalances.There exist studies investigating the levels of scapular muscle activation during CKC exercises. Researchers have shown that most CKC exercises especially push-ups and plank variations with the shoulder in the 90° position, generally provide high SA activity and an optimal UT/SA ratio.In the literature, there is limited information on how the level of shoulder elevation affects scapular muscle activity and ratio during closed kinetic chain exercises in the prone position. To effectively prescribe CKC exercises commonly used in rehabilitation and athletic programs, a clear understanding of shoulder elevation changes muscle activity during these exercises is required. Our hypothesis is that glenohumeral joint elevation status will alter scapular muscle activation and activation rates.

Conditions

Shoulder Pain; Shoulder Injuries; Activation, Patient

Keywords

Scapular muscle; Exercise; Electromyography; Kinetic chain

Outcome Measures

Primary Outcomes (1)

• Muscle activation recorded with surface electromyography (sEMG) during CKC

  In this study, muscle activations of the Upper Trapezius (UT), Middle Trapezius (MT), Lower Trapezius (LT), and Serratus Anterior (SA) muscles during six different closed kinetic chain (CKC) exercises will be investigated. The exercises include Low Plank Plus, High Plank Plus, Stir the Pot, Body Saw, Dolphin Press, and Pike Press. The average signal amplitude of each exercise will be divided by the Maximum Voluntary Isometric Contraction (MVIC) of each muscle of interest to obtain the %MVIC value. The average %MVICs will also be used for UT/MT, UT/LT, and UT/SA ratio calculations.

  2 hours for each participant

Study Arms (1)

Superficial electromyography

EXPERIMENTAL

Electrode placement was performed on the participants' dominant side UT, MT, LT, and SA muscles. Following this, superficial electromyography measurements were performed during maximal voluntary isometric contraction tests and six different upper extremity closed kinetic chain exercises.

Diagnostic Test: Superficial Electromyography

Interventions

Superficial Electromyography DIAGNOSTIC_TEST

For all MVICs, five seconds of each repetition were included in the analysis and the maximum value of three repetitions was taken. For all exercises, the middle 3 seconds of the 5 second data collection period were included in the analysis and the average muscle activation level of the three repetitions was recorded. The average signal amplitude of each exercise was divided by the MVIC of each muscle of interest to obtain the %MVIC value.

Also known as: sEMG

Superficial electromyography

Eligibility Criteria

• Age: 18 Years - 30 Years
• Gender Eligibility Details: Healthy, physically active
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Physically active male individuals (self-reported participating in 150 minutes per week of moderate-vigorous aerobic activity)
• Being between 18-30 years old
• Having full range of motion of shoulder without pain
• Having a body mass index less than 30 kg\\m2.

You may not qualify if:

• Having pain in any kinetic chain of the body, had history of any musculoskeletal problems or orthopaedic surgery,
• Having symptoms in at least one of the screening tests (Hawkins-Kennedy, Neer, Resistant External Rotation, Jobe and Apprehension Test),
• Being diagnosed with a rheumatic, systemic or neurological disease.

Sponsors & Collaborators

• Hacettepe University: lead

Study Sites (1)

Hacettepe University

Ankara, 06430, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Shoulder Pain; Shoulder Injuries; Patient Participation; Motor Activity

Condition Hierarchy (Ancestors)

Arthralgia; Joint Diseases; Musculoskeletal Diseases; Pain; Neurologic Manifestations; Signs and Symptoms; Pathological Conditions, Signs and Symptoms; Wounds and Injuries; Patient Acceptance of Health Care; Treatment Adherence and Compliance; Health Behavior; Behavior

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate Professor Elif TURGUT

Model Details: All participants will complete each stage in a randomized order.

Study Record Dates

• First Submitted: February 1, 2024
• First Posted: February 23, 2024
• Study Start: September 25, 2022
• Primary Completion: April 30, 2023
• Study Completion: June 20, 2023
• Last Updated: February 26, 2024

Record last verified: 2024-02

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)