Figure 7:

(A) In situ longitudinal pre-stretch (${\mathit{\lambda }}_z^{\text{in situ}}$, blue) compared with the decoupling pre-stretch (${\mathit{\lambda }}_z^{\text{decoupling}}$, red and magenta) at which the internal pressure becomes independent of the axial force; (B) change in the FPA stored energy (i.e. ΔW = W_sys − W_dias) with age calculated using the adjusted parameters (solid lines) and the non-adjusted parameters (dashed lines). Boxes bound 25^th and 75^th percentiles for each age group, median and average values are marked with a line and a dot within each box, and whiskers extend to the 5^th and 95^th percentiles. Boxes are plotted for the data adjusted for the flattening deformations.