Fig. 5. Best-fit linear correlations between the normalized peak MG and SOL forces (Ai-Ci), and between the normalized MG and SOL root mean squares of electromyographic activity (EMG) (Aii-Cii) for consecutive step cycles of uphill walking in four animals. (A) 30°, (B) 45°, (C) 60°. The correlation coefficients, and the total number of steps for these trials, are summarized in Table 2.