Electromyography-based Fatigue Assessment During Endurance Testing by Different Vibration Training Protocols

Objectives: This study presents a method of assessing muscle fatigue during endurance testing at 50% maximal voluntary contraction (MVC) using electromyography (EMG) information as indirect indices fatigability in the forearm muscles, namely, flexor digitorum superficialis (FDS); carpi ulnaris (FCU); extensor (ECU) and radialis brevis (ECRB)." (ECRB). Methods: A randomized comparative experimental design was used test with 8 VT protocols; based on different combinations vibration frequency (35 & 45 Hz), amplitude (3±0.5g 9±0.5g), exposure duration (30 60 seconds), i.e., were given to participants for 4 days. random sampling conducted from two groups (n=56/group), follows: individuals Sedentary Lifestyle (SL) group Construction Workers (CW). Results: Multivariate Analysis Variance (MANOVA) results indicated significant increase EMG rms, median frequency, waveform length, mean absolute value (P<0.001), variance signal (P<0.05) (except ECU SL ECRB CW signal) after all muscles both research groups. Therefore, an parameter grip task revealing elevation is indicative fiber fatigue. Furthermore, strongest correlation found between WL (r=0.471, P<0.001), rms (r=0.401, P<0.001) only. Discussion: The patterns represented spectral parameters signal, enabling real-time analysis. Additionally, surface useful indirectly evaluating performance test.