Abstract
The aim of this study was to analyze the electromyographic signal of the rectus femuris (RF), vastus lateralis (VL), biceps femuris (BF), tibialis anterior (TA), and gastrocnemius lateralis (GL) muscles of seven male volunteers, during different running velocities; and determine and compare the EMGFT (electromyographic fatigue threshold), LT (lactate threshold) and AT (anaerobic threshold). The running protocol started with a velocity of 10 km.h -1 and each three minutes elapsed occurred an increments of 1 km.h -1 until the exhaustion, with an 30 second interval between each velocity increment to collect 25 μl of blood. The increase of RMS values was verified in the RF in the velocities of 12 km.h -1 to 14 km.h -1 . The EMGFT showed similarity between the muscles and in the indexes were found the following significant differences: AT > LT; EMGFT RF and EMGFT VL LT. These data confirmed the viability of using the EMGFT as a possible indicator to analyze the muscle fatigue.
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