Resulting model outputs after re-parameterisation of the Niederer-model. A) Force-pCa relationship for parameter set 1 in Table 6. The force-pCa relationships for the remaining parameter sets in Table 6 are shown in Additional file 3: Figure A3.1. The parameter λ represents the cell length relative to the resting cell length. B) Tension transients for the three simulations for which the force-pCa relationships matched that of the Land-model.