The Effect of Unstable Loads on Scapular Kinematics and Muscle Activation During Overhead Press in Overhead Athletes With Subacromial Pain Syndrome
1 other identifier
observational
27
1 country
1
Brief Summary
The research aims to compare the differences between stable and unstable load conditions during shoulder pressing in overhead athletes with SAPS and to compare the differences between SAPS and healthy athletes with stable and unstable load conditions.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at below P25 for all trials
Started Sep 2024
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
Study Start
First participant enrolled
September 26, 2024
CompletedFirst Submitted
Initial submission to the registry
June 9, 2026
CompletedFirst Posted
Study publicly available on registry
June 15, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
June 30, 2026
ExpectedStudy Completion
Last participant's last visit for all outcomes
June 30, 2026
June 15, 2026
June 1, 2025
1.8 years
June 9, 2026
June 9, 2026
Conditions
Outcome Measures
Primary Outcomes (3)
Scapular kinematics (degrees) during shoulder elevation measured by VIPER™ system
Scapular upward rotation, posterior tilt, and external rotation angles (in degrees) were recorded during shoulder press using the VIPER™ electromagnetic tracking system. Data were collected at 30°, 60°, 90°, and 120° of humeral elevation, and reported as mean values for each angle.
Immediately after the single session
Surface electromyography (TeleMyo2400T G2, Noraxon USA Inc., Scottsdale, AZ, USA)
Muscle activation of upper trapezius, lower trapezius, serratus anterior, anterior deltoid, biceps brachii, triceps brachii, rectus abdominis, erector spinae during shoulder press
Immediately after the single session
Barbell trajectory (measured with camera)
The trajectory was captured by attaching reflective markers to the end of the barbell and recording kinematic data at a sampling frequency of 60 Hz using a camera.
Immediately after the single session
Secondary Outcomes (1)
Shoulder average pain intensity
Immediately after the single session
Study Arms (2)
Control group
Experimental group
Interventions
Participants performed a shoulder press using a barbell loaded at their individual 15-repetition maximum
Participants performed a shoulder press using a unstable loaded at their individual 15-repetition maximum
Eligibility Criteria
Participants were recruited from sports-related venues.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
National Yang Ming Chiao Tung University
Taipei, Taiwan
Central Study Contacts
Study Design
- Study Type
- observational
- Observational Model
- CASE ONLY
- Time Perspective
- CROSS SECTIONAL
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
June 9, 2026
First Posted
June 15, 2026
Study Start
September 26, 2024
Primary Completion (Estimated)
June 30, 2026
Study Completion (Estimated)
June 30, 2026
Last Updated
June 15, 2026
Record last verified: 2025-06