Figure 3
The work-loops of CE (a) and MTC (b) in one passive exemplary trial. The solid, dark-grey loops are the \(L_{CE,0}\) or \(L_{MTC,0}\) responses, respectively, to \(\Delta F\). The solid, thin, black line is the respective linear 2-parameter (force (length)) fit to the data. The solid, black loops depict the respective 3-parameter fits to the data, using the parameters \(k_{i}\), \(b_{i}\), \(d_{i}\) of each the function \(F_{i}(L_{i},\dot{L}_{i})\) (see Eq. 1), which linearly depends on length \(L_{i}\) and time rate of length change \(\dot{L}_{i}\); the dashed, black line is the respective length-dependent contribution. Both work-loops encompass one oscillation period that spans between TD and the instant when \(a_{COM}\) returns closest to zero for the second time (Supplementary Fig. S1). The Root Mean Square Error (RMSE) for the 3-parameter fit to data in (a,b) is 0.038 N and 0.018 N, respectively.
