Fig. 5.

Average mean-squared displacement (± SEM) during the last 40 min ($N=5$, line density of $4.9\times {10}^{-2}$ μm^-2): a different fiber stiffnesses ($E=1.1$ MPa) at constant contraction rate $\dot{c}=0.1$ μm/s; b different contraction rates at constant fiber stiffness $E=1.1$ MPa; c different contraction rates at increased constant fiber stiffness $5\times E$. Note that in this case, the contraction rates were adjusted such that the product of contraction rate and fiber stiffness remains constant compared to (b)