Effects of a Pectoralis Minor Muscle Stretching Protocol

NCT ID: NCT01956240

Last Updated: 2015-05-19

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE4
• Total Enrollment: 97 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2013-06-30
• Study Completion Date: 2014-01-31

Brief Summary

The purpose of this study is to verify the effects of a stretching protocol for the pectoralis minor muscle on its resting length and on the 3D kinematics of the scapula during arm flexion in asymptomatic subjects and patients with impingement syndrome with shortened pectoralis minor.

Detailed Description

Fifty subjects (25 symptomatic and 25 asymptomatic for shoulder pain) will be recruited. All of them will be initially assessed twice with one week between the assessments. On each day, they will complete two questionnaires (DASH and SPADI) to assess pain and shoulder function. The resting length of the pectoralis minor muscle and scapular kinematics data during arm flexion will also be measured using an electromagnetic tracking system. Initially, the resting length of the pectoralis minor will be measured, and then 3 repetitions of arm elevation in the sagittal plane will be completed. The stretching protocol will be performed daily for 6 weeks. The stretching will be performed with the subject standing, with 90° of arm abduction and 90° of elbow flexion and palm on a flat planar surface. The subject then will place the leg opposite to the flat surface in front of the other with slight knee flexion and tilt the trunk forward like a rigid block and rotate it slightly increasing the horizontal abduction at the shoulder. This procedure will be done 4 times for 1 min and 30s interval between repetitions. After the 6 weeks, the subject will have the same variables from the initial assessments reassessed. For the questionnaires and length of pectoralis minor a two-way ANOVA for repeated measures will be used to check the main effects of group and evaluation and whether there is interaction between them. For scapular internal/external rotation, upward/downward rotation, and tilt anterior/posterior a three-way ANOVA for repeated measures will use to analyze the main effects of group (symptomatic and asymptomatic), elevation angle of the arm (30°, 60°, 90° and 120°) and evaluation (1, 2 and 3) and whether there is evaluation x group x angle interaction. A p value less than 0.05 will be considered significant.

Conditions

Shoulder Pain

Study Design

• Allocation Method: NON_RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: DOUBLE

Study Groups

Stretching-Asymptomatic subjects

The stretching will be performed with the subject standing, with 90° of arm abduction and 90° of elbow flexion and palm on a flat planar surface. The subject then will place the leg opposite to the flat surface in front of the other with slight knee flexion and tilt the trunk forward like a rigid block and rotate it slightly increasing the horizontal abduction at the shoulder. This procedure will be done 4 times for 1 min and 30s interval between repetitions.

Group Type: EXPERIMENTAL

Stretching-Asymptomatic subjects

Intervention Type: PROCEDURE

The stretching will be performed with the subject standing, with 90° of arm abduction and 90° of elbow flexion and palm on a flat planar surface. The subject then will place the leg opposite to the flat surface in front of the other with slight knee flexion and tilt the trunk forward like a rigid block and rotate it slightly increasing the horizontal abduction at the shoulder. This procedure will be done 4 times for 1 min and 30s interval between repetitions.

Stretching-Subjects with shoulder pain

The stretching will be performed with the subject standing, with 90° of arm abduction and 90° of elbow flexion and palm on a flat planar surface. The subject then will place the leg opposite to the flat surface in front of the other with slight knee flexion and tilt the trunk forward like a rigid block and rotate it slightly increasing the horizontal abduction at the shoulder. This procedure will be done 4 times for 1 min and 30s interval between repetitions.

Group Type: EXPERIMENTAL

Stretching-Subjects with shoulder pain

Intervention Type: PROCEDURE

The stretching will be performed with the subject standing, with 90° of arm abduction and 90° of elbow flexion and palm on a flat planar surface. The subject then will place the leg opposite to the flat surface in front of the other with slight knee flexion and tilt the trunk forward like a rigid block and rotate it slightly increasing the horizontal abduction at the shoulder. This procedure will be done 4 times for 1 min and 30s interval between repetitions.

Interventions

Stretching-Asymptomatic subjects

The stretching will be performed with the subject standing, with 90° of arm abduction and 90° of elbow flexion and palm on a flat planar surface. The subject then will place the leg opposite to the flat surface in front of the other with slight knee flexion and tilt the trunk forward like a rigid block and rotate it slightly increasing the horizontal abduction at the shoulder. This procedure will be done 4 times for 1 min and 30s interval between repetitions.

Intervention Type: PROCEDURE

Stretching-Subjects with shoulder pain

The stretching will be performed with the subject standing, with 90° of arm abduction and 90° of elbow flexion and palm on a flat planar surface. The subject then will place the leg opposite to the flat surface in front of the other with slight knee flexion and tilt the trunk forward like a rigid block and rotate it slightly increasing the horizontal abduction at the shoulder. This procedure will be done 4 times for 1 min and 30s interval between repetitions.

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

Asymptomatic subjects were included if they did not have any positive test for SIS.

The subjects with shoulder pain were included if:

1. they had history of shoulder, at least one week;

2. 18 - 45 years;

3. range of motion > 150° evaluated with digital inclinometer;

4. one or more impingement tests positive - Neer (Neer, 1972), Hawkins (Hawkins and Kennedy, 1980) and Jobe (Jobe and Moynes, 1982) - associated with painful arc during arm elevation, or during external rotation with 90° of arm elevation;

5. Individuals from both groups also had to present with shortened PM muscle length.

Exclusion Criteria

Individuals from both groups were excluded if they:

1. BMI (body mass index) > 28kg/m2;

2. irradiated shoulder pain;

3. scoliosis;

4. history of shoulder pain with beginning traumatic;

5. history of fracture or surgery in upper limb and rotator cuff;

6. systemic illnesses;

7. tape allergy;

8. were pregnant;

9. physiotherapy at least 6 months.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 45 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Universidade Metodista de Piracicaba

OTHER

Sponsor Role: collaborator

Universidade Federal de Sao Carlos

OTHER

Sponsor Role: lead

Responsible Party

Dayana Patricia Rosa

Universidade Federal de São Carlos

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Dayana Rosa, PT

Role: PRINCIPAL_INVESTIGATOR

UNIMEP

Locations

UFSCar

São Carlos, São Paulo, Brazil

Countries

Brazil

Other Identifiers

100/12

Identifier Type: -

Identifier Source: org_study_id