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.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
27
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.
Universiteit Antwerpen, Department of Rehabilitation Sciences and Physiotherapy, Research group MOVANT
Wilrijk, Belgium
RECRUITINGsEMG 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
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