Fatigue, Myofascial Trigger Point Pain
Conditions
Keywords
Upper trapezius, Myofascial Trigger Point, Muscle fatigue, Overhead athlete
Brief summary
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.
Detailed description
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).
Interventions
BEHAVIORALUpper trapezius muscle fatigue
Isometric contraction of scapular elevation
Sponsors
National Taiwan University Hospital
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Caregiver, Investigator, Outcomes Assessor)
Masking description
Data were collected by the attending surgeon who was blinded to the group assignment.
Intervention model description
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.
Eligibility
Sex/Gender
ALL
Age
18 Years to 50 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Scapular kinematics | 10 minutes | Change of scapular kinematics immediately after fatigue task |
| Scapular muscles electromyography | 10 minutes | Change of scapular muscles electromyography immediately after fatigue task |
Countries
Taiwan
Outcome results
None listed