Figure 6
Quantification of EMG-time and –frequency domain features collected during standing with one lower limb assisted for knee extension. Representative time- and frequency-domain EMG features collected during standing when one lower limb achieved independent extension (kI) while the contralateral limb required external assistance for knee extension (kA). EMG features values were averaged among research participants (n = 7) and among different muscle groups of the assisted lower limb (kA) or the independent lower limb (kI). In particular, all investigated muscles (soleus, medial gastrocnemius, vastus lateralis, rectus femoris, gluteus maximus, tibialis anterior and medial hamstring; total n = 49), primary extensor muscles (left and right soleus, medial gastrocnemius, vastus lateralis, rectus femoris, gluteus maximus; total n = 35), or primary flexor muscles (left and right tibialis anterior and medial hamstring; total n = 20) were considered for analysis. Values are expressed as mean ± standard deviation (SD). Differences were tested by Wilcoxon test. *p < 0.05; **p < 0.01; ***p < 0.001.
