Upper Trapezius Myofascial Trigger Point in Overhead Athletes After Upper Trapezius Muscle Fatigue

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE3

Total Enrollment

60 participants

Study Classification

INTERVENTIONAL

Study Start Date

2019-06-17

Study Completion Date

2022-02-28

Brief Summary

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The healthy overhead athletes with and without upper trapezius myofascial trigger point will be asked to perform a scapular elevation task until the upper trapezius muscle fatigue. The first hypothesis is that the subjects with upper trapezius myofascial trigger point will show significant difference in scapular kinematics and muscles activities when compared to subjects without upper trapezius myofascial trigger point. Besides, the investigators suggest that subjects with/without upper trapezius myofascial trigger point will show significant difference in scapular kinematics and muscles activities after upper trapezius muscle fatigue, especially in subjects with upper trapezius myofascial trigger point.

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Detailed Description

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The investigators will recruit healthy overhead athletes with and without upper trapezius myofascial trigger point. Participants will be asked to perform a sustained scapular elevation task at their peak force until the force decrease 50 %, which indicates upper trapezius muscle fatigue. There are two purposes in the current study: (1) to compare the differences between overhead athletes with/without upper trapezius myofascial trigger point during arm elevation in scapular kinematics and muscles activities (2) to investigate the effects of upper trapezius muscle fatigue on scapular kinematics and muscles activities in overhead athletes with/without upper trapezius myofascial trigger point. The first hypothesis is that the subjects with upper trapezius myofascial trigger point will show significant difference in scapular kinematics and muscles activities when compared to subjects without upper trapezius myofascial trigger point. Besides, the investigators suggest that subjects with/without upper trapezius myofascial trigger point will show significant difference in scapular kinematics and muscles activities after upper trapezius muscle fatigue, especially in subjects with upper trapezius myofascial trigger point. The outcome measurements includes scapular kinematics (upward/downward rotation, external/internal rotation, posterior/anterior tilting) and muscles activities (upper trapezius, serratus anterior, lower trapezius).

Conditions

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Myofascial Trigger Point Pain Fatigue

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

The treatment allocation and procedures involved in this randomized study were explained to all participants when they met inclusion criteria of VAS score of 4 or greater on the postoperative first day.

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Caregivers Investigators Outcome Assessors

Data were collected by the attending surgeon who was blinded to the group assignment.

Study Groups

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MTrP group

Healthy overhead athletes with upper trapezius myofascial trigger point

Group Type EXPERIMENTAL

Upper trapezius muscle fatigue

Intervention Type BEHAVIORAL

Isometric contraction of scapular elevation

Control group

Healthy overhead athletes without upper trapezius myofascial trigger point

Group Type SHAM_COMPARATOR

Upper trapezius muscle fatigue

Intervention Type BEHAVIORAL

Isometric contraction of scapular elevation

Interventions

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Upper trapezius muscle fatigue

Isometric contraction of scapular elevation

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* 18-50 years old active overhead athletes
* No symptoms in the shoulder of dominant side in the past 6 months
* Regularly perform overhead sports activity ≥ 3 hr/wk for more than 6 months

Exclusion Criteria

* History of major shoulder/cervical injury or surgery in the past 6 months
* Experiencing shoulder pain, or participating in rehabilitation for shoulder pain in the past 6 months before the study

Minimum Eligible Age

18 Years

Maximum Eligible Age

50 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes