Muscle Fatigue and Scapular Sensorimotor System

Muscle; Fatigue Clinical Trial

Official title:

Muscle Fatigue and Scapular Sensorimotor System

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03066102
• Other study ID #: YM105067E
• Status: Completed
• Phase: N/A
• Start date: July 1, 2017
• Est. completion date: March 27, 2018

Study information

• Verified date: July 2019
• Source: National Yang Ming University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The aims of this study are to investigate the effects of scapular muscle fatigue on scapular joint position sense and neuromuscular performance (scapular muscle strength, the kinematics data and muscle activity of shoulder during scaption (arm elevation in the scapular plane)). The investigators hypothesize that scapular muscle fatigue would increase scapular reposition error and affect neuromuscular performance of the scapular during scaption.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 30
• Est. completion date: March 27, 2018
• Est. primary completion date: August 11, 2017
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 20 Years to 40 Years

Eligibility

Inclusion Criteria:

• no shoulder, cervical, and thoracic spine pain within six months

• negative for subacromial impingement test

• normal range of motion of glenohumeral joint

Exclusion Criteria:

• history of dislocation, fracture, or surgery of shoulder joint

• history of central nervous system disorder, rheumatoid arthritis, shoulder osteoarthritis, or cervical radiculopathy

Related Conditions & MeSH terms

• Fatigue
• Muscle; Fatigue

Intervention

Other:
• muscle fatigue
Modified push-up plus exercise: the participants first supported by both knees and the single elbow, and then performed sustained scapular protraction for three minutes with ten repetitions in males and two minutes with five repetitions in females with forty-five seconds rest between.

Locations

Country	Name	City	State
Taiwan	National Yang Ming University	Taipei

Sponsors (1)

Lead Sponsor	Collaborator
National Yang Ming University

Country where clinical trial is conducted

Taiwan, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change From Baseline in Scapular Proprioception	Test the ability of active re-position the scapula from neutral to 90% range of protraction, and elevation.	through fatigue intervention completion, an average of 20 minutes in female subjects and 40 minutes in male subjects
Primary	Change From Baseline in Muscle Activation During Scapular Proprioception	Test the ability of muscle activation (upper trapezius, lower trapezius, and serratus anterior) during active re-position the scapula from neutral to 90% range of protraction, and elevation.; Muscle activation during active re-position would divide into muscle activation during maximum voluntary isometric contraction (MVIC), present in percent.	through fatigue intervention completion, an average of 20 minutes in female subjects and 40 minutes in male subjects
Secondary	Change From Baseline in Scapular Muscle Strength	use dynamometer to detect the force of maximum isometric voluntary contraction of upper trapezius, lower trapezius and serratus anterior	through fatigue intervention completion, an average of 20 minutes in female subjects and 40 minutes in male subjects
Secondary	Change From Baseline in Shoulder Kinematics Data During Shoulder Elevation in the Scapular Plane	use Liberty to detect the motion of spine, humerus, and scapula during shoulder elevation in the scapular plane (scaption)	through fatigue intervention completion, an average of 20 minutes in female subjects and 40 minutes in male subjects
Secondary	Change From Baseline in Scapular Muscle Activity During Shoulder Elevation in the Scapular Plane	Test the ability of muscle activity (upper trapezius, lower trapezius, and serratus anterior) during shoulder elevation in the scapular plane (scaption).; Muscle activation during scaption would divide into muscle activation during maximum voluntary isometric contraction (MVIC), present in percent.	through fatigue intervention completion, an average of 20 minutes in female subjects and 40 minutes in male subjects
Secondary	Change From Baseline in Scapular Muscle Recruitment Timing During Arm Elevation in Scapular Plane	Test the ability of muscle onset timing (upper trapezius, lower trapezius, and serratus anterior) during shoulder elevation in the scapular plane (scaption).; Onset timing was determined by EMG signals bigger than resting signals plus 3 times standard deviations.; Origin was set at onset of kinematics data of glenohumeral joint.	through fatigue intervention completion, an average of 20 minutes in female subjects and 40 minutes in male subjects