Stacked bar graphs of the mean values and standard deviations of the relative deformation (%) undergone by the ATM (εT), lower gel layer (εL1), and upper gel layer (εL2), compared to total system deformation. Depicted here are the values for stacked gels in which an Ag20 layer was paired with another agar layer (Ag25, Ag30, Ag40, or Ag60). Ag20 was on top (layer L2) in (a) and (b) and on bottom (layer L1) in (c) and (d). Deformation at the end of compression step (t1) is depicted in (a) and (c), and deformation at the end of holding step (t2) is depicted in (b) and (d).