The effect of local and global fatigue on the myoelectric variables of selected lower limb muscles in healthy young active men in single jump-landing task

Abstract

Since fatigue is recognized as a common phenomenon during exercise and it is hypothesized that it will often impair motor function and cause various injuries, the purpose of this study was to determine: The effect of local and global fatigue on the myoelectric variables of selected lower limb muscles in healthy young men active in single leg jump-landing task. Twenty able-bodied healthy young males participated in this quasi-experimental study. Wingate and Bruce tests were used to create local and global fatigue, respectively. Electrical activity of selected lower limb muscles (Gluteus Medius, Vastus lateralis, Tibialis Anterior, Peroneus Longus, Gastrocnemius and soleus muscles) was recorded from electromyography device, and Analysis of variance (ANOVA) with repeated measures tests were used to data analysis. The effect of two types of local and global fatigue on the dependent variables was used at the significant level P≥0.05. The results showed a significant difference between the effect of local and global fatigue on the mean normalized middle serine muscle activity (P=0.046) and medial Gastrocnemius muscle midline frequency (P=0.019). However, there was no significant difference between mean and maximum normalized activity and frequency of middle serine, Vastus lateralis, anterior tibia, fibular longus and soleus (P<0.05). According to the findings of this study, it seems that the effect of the type of local and global fatigue on lower limb muscle performance during single jump-landing exercise is the same