An interventional study of Surface Electromyography in Healthy Adolescents, sponsored by Universiteit Antwerpen. Recruiting at 1 site in Belgium. Open to participants aged 13 Years to 19 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-09-08.
Sponsored by Universiteit Antwerpen · Not applicable, Interventional, and Basic science
This cross-sectional study aims to determine the test-retest reliability of surface electromyography (sEMG) outcomes in detecting levels of fatigue among healthy adolescents engaged in physical activities. It seeks to evaluate the consistency of sEMG parameters across two test sessions and correlate these measurements with both performance metrics and subjective fatigue assessments.
Participants will perform repetitive squatting until volitional exhaustion while their muscular activity is recorded. They will do so on two different test sessions with an interval of one week in between.
Universiteit Antwerpen is the lead sponsor of 128 studies on the registry; 28 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
To induce muscular fatigue, participants will perform a repetitive bodyweight squat until 1) the squat cannot be performed over the full range of motion for 2 consecutive repetitions and 2) physical exertion occurs (10-point Borg scale).
Diagnostic Test: Surface Electromyography
The primary lower limb muscles to be monitored include the gluteus medius, rectus femoris, vastus lateralis (quadriceps ), biceps femoris (hamstrings), tibialis anterior, and gastrocnemius medialis (calves). This setup fully utilizes a 16-channel sEMG system by monitoring each muscle group bilaterally to capture comprehensive data on muscle activity and fatigue.
sEMG median power frequency (MPF) - test
A parameter used to analyze the frequency content of the electrical signals generated by muscle activity. Changes in the MPF can indicate alterations in muscle fiber recruitment and metabolic changes during sustained muscle contractions
Time frame: first test session at day 1
sEMG median power frequency - retest
A parameter used to analyze the frequency content of the electrical signals generated by muscle activity. Changes in the MPF can indicate alterations in muscle fiber recruitment and metabolic changes during sustained muscle contractions
Time frame: second test session after 1 week
sEMG RMS amplitude - test
A single value that represents the magnitude of the sEMG signal over a specified period of time, higher RMS values indicate greater muscle activation.
Time frame: first test session at day 1
sEMG RMS amplitude - retest
A single value that represents the magnitude of the sEMG signal over a specified period of time, higher RMS values indicate greater muscle activation.
Time frame: second test session after 1 week
VAS score - test
subjective fatigue score
Time frame: first test session at day 1
VAS score - retest
subjective fatigue score
Time frame: second session after 1 week
Age
age in years
Time frame: first test session at day 1
Gender
male/female/other
Time frame: first session
Height
body height in centimeters
Time frame: first test session at day 1
Weight
body weight in kilograms
Time frame: first test session at day 1
Leg length
Length measured from trochanter major to the ground in centimeters
Time frame: first test session at day 1
Physical Activity
PAQ-A (physical activity questionaire for adolescents): a self-administered, 7-day recall instrument. It was developed to assess general levels of physical activity for high school students in grades 9 to 12 and approximately 14 to 19 years of age.
Time frame: first test session at day 1
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Plan to share: No
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Universiteit Antwerpen