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Alterations in Spiking Following Muscle Fatigue in Volleyball Players

NCT07687550 · Status: NOT_YET_RECRUITING · Type: OBSERVATIONAL · Enrollment: 35

Last updated 2026-07-07

No results posted yet for this study

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.

Conditions

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: 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.

Sponsors & Collaborators

  • National Yang Ming Chiao Tung University

    lead OTHER

Eligibility

Min Age
18 Years
Max Age
35 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2026-07-31
Primary Completion
2027-01-31
Completion
2027-01-31

Countries

  • Taiwan

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07687550 on ClinicalTrials.gov