Immediate Effects of Different Stretching Methods for Pectoralis Minor Muscle

NCT06307899 | Recruiting

• 1 other identifier: E-77082166-302.08.01-639069
• Study Type: interventional
• Target: 25
• Locations: 1 country
• Sites: 1

Brief Summary

The aim of our study is to compare the effects of different stretching methods for the pectoralis minor (PM) muscle on scapula position, PM muscle length and scapular muscle activation in individuals with shoulder protraction. Unilateral corner stretching, manual stretching and proprioceptive neuromuscular facilitation (PNF) stretching methods will be applied randomly, 2 days apart, to volunteer individuals who agree to participate in our study. Three different stretching methods (unilateral corner stretching, manual stretching and PNF stretching) will be applied to individuals randomly, 48 hours apart, and PM length, PM index, scapula upward rotation and EMG values will be recorded by a blind evaluator before and after the stretching application.

Conditions

Rounded Shoulder Posture

Keywords

Pectoralis Minor; Stretching; Muscle Activation

Outcome Measures

Primary Outcomes (8)

• Pectoralis Minor Length

  To measure the length of the pectoralis minor muscle, the distance between the caudal corner of the 4th rib and the inferomedial face of the coracoid process will be recorded with a tape measure.

  Baseline

• Pectoralis Minor Length

  To measure the length of the pectoralis minor muscle, the distance between the caudal corner of the 4th rib and the inferomedial face of the coracoid process will be recorded with a tape measure.

  Immediately after intervention

• Pectoralis Minor Index

  PM index will be recorded by calculating the ratio of the pectoralis minor length to the individual's height multiplied by 100.

  Baseline

• Pectoralis Minor Index

  PM index will be recorded by calculating the ratio of the pectoralis minor length to the individual's height multiplied by 100.

  Immediately after intervention

• Scapula Upward Rotation Measurement

  Individuals' scapula upward rotation measurement will be evaluated with an inclinometer in the resting position, 45º, 90º and 135º shoulder abduction positions. Three measurements will be taken with a 30-second rest interval and the average value will be calculated.

  Baseline

• Scapula Upward Rotation Measurement

  Individuals' scapula upward rotation measurement will be evaluated with an inclinometer in the resting position, 45º, 90º and 135º shoulder abduction positions. Three measurements will be taken with a 30-second rest interval and the average value will be calculated.

  Immediately after intervention

• EMG Analysis

  Individuals' upper trapezius, middle trapezius, lower trapezius and serratus anterior muscle activations will be evaluated using superficial EMG. Measurements will be taken from the dominant side.

  Baseline

• EMG Analysis

  Individuals' upper trapezius, middle trapezius, lower trapezius and serratus anterior muscle activations will be evaluated using superficial EMG. Measurements will be taken from the dominant side.

  Immediately after intervention

Study Arms (3)

Group 1

EXPERIMENTAL

Unilateral Corner Stretching

Other: Unilateral Corner Stretch

Group 2

EXPERIMENTAL

Manual Stretching

Other: Manual Stretching

Group 3

EXPERIMENTAL

PNF Stretching

Other: PNF Stretching

Interventions

Unilateral Corner Stretch OTHER

Individuals will be positioned in a standing position with the elbow in 90° flexion and the shoulder in 90° abduction, placing the palm on a flat surface. For stretching, individuals will be asked to increase shoulder horizontal abduction by rotating the trunk anteriorly and contralaterally. The position will be maintained for 30 seconds and will be repeated 4 times with a 30-second rest between repetitions.

Group 1

Manual Stretching OTHER

Individuals will be positioned supine with the shoulder in 90º abduction and external rotation and the elbow in 90º flexion. Stretching will be applied by the physiotherapist from just distal to the elbow in the direction of horizontal abduction of the shoulder. The position will be maintained for 30 seconds and will be repeated 4 times with a 30-second rest between repetitions.

Group 2

PNF Stretching OTHER

Individuals will be in a sitting position with their hands clasped behind the head. The PM muscle will be stretched in the direction of horizontal abduction by placing the physiotherapist's hands anterior to the elbows. Passive stretching will be continued for 10 seconds, followed by 6 seconds of maximum voluntary isometric contraction of the PM muscle. The procedure will be repeated four times with 30 seconds of rest.

Group 3

Eligibility Criteria

• Age: 18 Years - 40 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Having a shoulder protraction posture
• Not having had a shoulder surgery before
• Agreeing to participate in the study

You may not qualify if:

• Cervical or shoulder pain
• Adhesive capsulitis
• Thoracic outlet syndrome
• Shoulder instability
• Shoulder surgery history
• Numbness or tingling in the upper extremity

Sponsors & Collaborators

• Gazi University: lead

Study Sites (1)

Gazi University

Ankara, Çankaya, 06490, Turkey (Türkiye)

RECRUITING

Related Publications (3)

• Borstad JD, Ludewig PM. Comparison of three stretches for the pectoralis minor muscle. J Shoulder Elbow Surg. 2006 May-Jun;15(3):324-30. doi: 10.1016/j.jse.2005.08.011.

  PMID: 16679233 BACKGROUND

• Rosa DP, Borstad JD, Pogetti LS, Camargo PR. Effects of a stretching protocol for the pectoralis minor on muscle length, function, and scapular kinematics in individuals with and without shoulder pain. J Hand Ther. 2017 Jan-Mar;30(1):20-29. doi: 10.1016/j.jht.2016.06.006. Epub 2016 Oct 18.

  PMID: 27769843 BACKGROUND

• Williams JG, Laudner KG, McLoda T. The acute effects of two passive stretch maneuvers on pectoralis minor length and scapular kinematics among collegiate swimmers. Int J Sports Phys Ther. 2013 Feb;8(1):25-33.

  PMID: 23439770 BACKGROUND

MeSH Terms

Interventions

Muscle Stretching Exercises

Intervention Hierarchy (Ancestors)

Exercise Therapy; Rehabilitation; Aftercare; Continuity of Patient Care; Patient Care; Therapeutics; Physical Therapy Modalities; Exercise; Motor Activity; Movement; Musculoskeletal Physiological Phenomena; Musculoskeletal and Neural Physiological Phenomena

Study Officials

• Selda Başar, PhD

  Gazi University

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Tuğçe Çoban, MSc

CONTACT

+905454098540; fzttugce@yahoo.com

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Research Assistant

Study Record Dates

• First Submitted: March 6, 2024
• First Posted: March 13, 2024
• Study Start: September 11, 2023
• Primary Completion: July 3, 2024
• Study Completion: September 4, 2024
• Last Updated: March 13, 2024

Record last verified: 2024-03

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)