A Study on Shoulder Adduction Pressure for Optimal Infraspinatus Activation During Shoulder External Rotation

Optimal Adduction Pressure for Selective Activation of the Infraspinatus Muscle During Shoulder External Rotation: An Electromyographic Study Using Pressure Biofeedback

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

CRIS

Registry ID

KCT0012315

Enrollment

Registered

2026-07-22

Start date

2026-09-01

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Interventions

Procedure/Surgery : The participant performs external rotation of the shoulder joint while standing with the shoulder abducted at 0° and the elbow flexed at 90°. External rotation is performed using a

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1) No history of shoulder pain or orthopedic surgery within the past 6 months. 2) A range of motion of external rotation of the shoulder joint of 45° or more. 3) No neurological injury or musculoskeletal disease of the upper extremities.

Exclusion criteria

Exclusion criteria: 1) History of experience pain or discomfort during external rotation of the shoulder. 2) History of experience pain during the maximal voluntary isometric contraction test of the shoulder muscles. 3) Individuals who are pregnant.

Design outcomes

Primary

Measure	Time frame
Muscle activity of the infraspinatus	—

Secondary

Measure	Time frame
Muscle activities of the posterior deltoid, latissimus dorsi, pectoralis major	—

Countries

Korea, Republic of

Contacts

Public ContactYong-Jun Cha

Daejeon University

cha0874@dju.kr+82-42-280-2292

Outcome results