Alterations in Spiking Following Muscle Fatigue in Volleyball Players
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Upper Extremity Muscle Fatigue Protocol.
- Who it may be relevant to
- Registry conditions: Fatigue. Basic parameters: 18 years — 35 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Taiwan
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
Alterations in Spiking Kinematic, Muscle Activation, and Subacromial Structures Following Muscle Fatigue in Volleyball Players
Overview
This study aims (1)to investigate the effects of repetitive functional overhead movements targeting shoulder and scapular muscles on glenohumeral and scapular kinematics and muscle activation during the arm cocking and acceleration of spiking, and changes in subacromial structures in healthy recreational volleyball players; (2) to compare these fatigue-related changes between athletes with good and poor shoulder motor control.
Interventions
- Behavioral Upper Extremity Muscle Fatigue Protocol
The subject performed upper extremity D2 diagonal exercise with Thera-band at kneeling position to simulate the arm movement of a volleyball spike. The movement is paced by a metronome at one beat per second, with one movement per beat. If participants could not keep up or become too fatigued, they are allowed to rest for 15 seconds before continuing. The subject was defined as fatigued, and the fatigue activity was stopped, only when all three of the following cumulative conditions were met:
Primary outcome measures
- Degree of the glenohumeral and scapulothoracic joint during spiking [Time frame: Baseline, immediately post-intervention (Day 1)]
- Activation amplitude of the glenohumeral and periscapular muscles [Time frame: Baseline, immediately post-intervention (Day 1)]
- Mean power frequency of the glenohumeral and periscapular muscles [Time frame: Baseline, immediately post-intervention (Day 1)]
Secondary outcome measures (2)
- Acromio-humeral distance and thickness of supraspinatus tendon thickness during arm elevation [Time frame: Baseline, immediately post-intervention (Day 1)]
- Degree of shoulder elevation at greater tuberosity-acromion alignment during arm elevation [Time frame: Baseline, immediately post-intervention (Day 1)]
Eligibility criteria
Inclusion criteria
- Between 18 and 35 years old
- At least 2 consecutive years of volleyball experience
- Involved in volleyball practice or game for at least 4 hours per week
- Able to perform a cross-body spike with 3-step
Exclusion criteria
- A history of major shoulder or spinal injury or surgery
- Experiencing shoulder pain (VAS ≥ 3/10) in the last 6 months
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Observational model
- Cohort
Study locations
Taiwan · 1 center
- National Yang Ming Chiao Tung University — Taipei
Identifiers
NCT: NCT07687550 · NYCU114118AF