Illustration of the experimental protocol and data analysis.

<p>(A) represents the experimental protocol with the three knee angles tested. Each knee angle was tested over two consecutive weeks. (B) represents the recruitment curves of the H reflex (grey line) and M wave (black line). (C) represents a typical SOL EMG trace at a stimulation intensity evoking at the H_max. (D) represents a typical SOL EMG trace at a stimulation intensity evoking at the M_max. (E) represents the torque and SOL EMG recordings during the MVC. Single spike represents a single stimulus. Double spikes represent paired stimuli (doublet). MVC: maximal voluntary contraction; W: week; GM: gastrocnemius medialis; SOL: soleus; H_max: maximal Hoffmann reflex; M_max: maximal motor potential; M_at-Hmax: motor potential recorded with the H_max.