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Alterations in Spiking Following Muscle Fatigue in Volleyball Players
Sponsor: National Yang Ming Chiao Tung University
Summary
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.
Official title: Alterations in Spiking Kinematic, Muscle Activation, and Subacromial Structures Following Muscle Fatigue in Volleyball Players
Key Details
Gender
All
Age Range
18 Years - 35 Years
Study Type
OBSERVATIONAL
Enrollment
35
Start Date
2026-07
Completion Date
2027-01
Last Updated
2026-07-07
Healthy Volunteers
Yes
Conditions
Interventions
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: 1. Until the number of repetitions in that set was less than 50% of the repetitions performed in the first set. 2. Using the Rating of Perceived Exertion (RPE) on a 6-20 scale, until the subject's RPE was greater than or equal to 15. 3. If this maximum strength showed a decrease of 25% or more compared to the maximum strength measured before the fatigue activity.
Locations (1)
National Yang Ming Chiao Tung University
Taipei, Taiwan