Figure 3. Average values and standard deviation for the Median Frequency (MDF) of the VMO (A), RF (B) and VL (C) muscles pre-exercise (Pre), immediately after (Post), during the 7 days after (1 to 7), and between the 21st and 30th (21-30) days after eccentric exercise. * p < 0.05, ** p < 0.01compared to the pre-exercise values.