EMG and ground reaction forces recorded during full weight-bearing standing.

<p>Time course of EMG and ground reaction force recorded during representative standing without stimulation and with stimulation parameters that promoted standing with the least amount of assistance. Participants A45 and A53 were able to stand placing their hands on the horizontal bars of the standing apparatus to assist balance. Participants B07 and B13 also used elastic cords fixed to the apparatus to assist with hip extension (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0133998#pone.0133998.s005" target="_blank">S1 Video</a>). Stimulation frequency, amplitude and electrode configuration (cathodes in black, anodes in grey, and non-active in white) are reported for each participant. Participant A53 was stimulated with four programs (P.1 to P.4) delivered sequentially at 10 Hz, resulting in an ongoing 40 Hz stimulation frequency. IL: iliopsoas; GL: gluteus maximus; MH: medial hamstring; VL: vastus lateralis; TA: tibialis anterior; MG: medial gastrocnemius; SOL: soleus.