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The aim of the present study was to analyze the electromyographic (EMG) signals of the rectus femoris (RF), vastus lateralis (VL), tibialis anterior (TA) and soleus (SO) muscles in young healthy adults with and without the use of an experimental ankle-foot-orthosis (AFO) designed for patients with hemiparesis. Twenty-eight individuals with an average age of 22 +/- 3.63 years participated in the study. An electromyograph, surface electrodes and two force plates were used. There was a non-significant increase in the TA activity with the use of the AFO (6.04 +/- 2.81) when compared to non-use (5.91 +/- 2.49) (p > 0.5); the same was true for the other muscles evaluated. There was a positive correlation (r = 0.37) between TA and SO activity (p < 0.05). The results demonstrate that the AFO did not affect the gait pattern of healthy young adults.