Effects of Manual Therapy on Shoulder Function

Summary

The purpose of this study is to directly compare the effects of four distinct interventions commonly used in the treatment of shoulder pathology on shoulder range of motion (ROM) and strength in asymptomatic shoulders:

* grade III oscillatory anterior-posterior glenohumeral joint mobilizations
* an internal rotation (IR) "sleeper" stretch
* supine upper-thoracic manipulation
* cervical spine manipulation

Conditions

• Musculoskeletal Manipulations
• Shoulder
• Range of Motion
• Muscle Strength
• Surface Electromyography

Interventions

OTHER

Thoracic Manipulation

A supine thoracic manipulation will be utilized. Participants will be lying supine on the plinth with their arms crossed over their chest, making sure the forearms are not crossed. An experienced clinician will place their hand on the inferior segment (T4); the superior segment (T3) will be placed in the midrange of thoracic flexion and extension. The clinician will apply a high velocity, end range, anterior to posterior thrust by using their body weight to deliver the thrust through the participants crossed elbows, thus creating a bilateral gapping of the facet joints. If a cavitation is achieved after the first thrust, the thoracic manipulation intervention is complete. If not, one more attempt will be made to achieve a cavitation. Regardless of if there was a cavitation or not, after the second attempt the intervention is complete.

OTHER

Cervical Manipulation

Participants will be lying supine on the plinth on the table. A high velocity low amplitude manipulation will be performed to the cervical spine by an experienced clinician.The clinician will place the right proximal phalanx of the index finger over the posterolateral aspect of the articular pillar at the right C4/C5 segment to maximally influence the C5 myotomal distribution. The clinician's left hand will be cradling the participants head. The participant will be brought into midrange flexion-extension, ipsilateral side bend, and contralateral rotation of C4/5. Once a firm end feel is felt the manipulation will be administered into left rotation in an arc toward the left eye. If a cavitation is achieved after the first thrust, the intervention is complete. If not, one more attempt will be made to achieve a cavitation;after the second attempt the intervention is complete.

OTHER

glenohumeral posterior glide mobilization

Participants will be instructed to lay supine on the plinth and a plastic orthopedic wedge will be placed under their scapula for stabilization on the side that is receiving the mobilization. The experienced clinician will stand on the same side being mobilized and held the participant's arm proximal to the medial and lateral humeral epicondyles. The clinician will hold the participant's arm in the scapular plane, approximately 55 degrees of abduction and slight ER with a grade one long axis distraction applied and sustained throughout the entire mobilization. A grade three oscillatory mobilization will be applied for three sets of 30 seconds with a 30 second rest in between.

OTHER

Sleeper stretch

Participants will be positioned in a side lying position with the arm to be stretched on the table. The arm to be tested will then be positioned at a 90-90 shoulder abduction and elbow flexion position. A support will be positioned behind the patient to ensure there is no compensatory trunk movement during the stretch, and an examiner verified the arm is in a 90-90 position. A sleeper stretch will be subsequently completed, in which the participant will internally rotate the arm to stretch the posterior shoulder musculature. Three, thirty second stretches will be completed

Sponsors & Collaborators

• University of Hartford

  lead OTHER

Principal Investigators

• Brian Swanson, PT, DSc · University of Hartford

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Model

CROSSOVER

Eligibility

Min Age

18 Years

Max Age

55 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2020-02-07

Primary Completion

2020-11-01

Completion

2020-11-01

Countries

• United States

Study Locations