Fig. 3

Changes in ultrasound-derived fascicle length (A-B), pennation angle (C-D), and muscle thickness (E-F) throughout casting (n = 10 young, n = 11 old) and recovery (n = 5 young, n = 6 old), with half the rats sacrificed post-cast and the remaining half sacrificed after 4 weeks of recovery. Left graphs display absolute values with individual data (grey lines), on which statistical analyses were performed. Right graphs show data normalized to pre-cast. Data are displayed as mean ± standard deviation. *Difference from pre-cast (P < 0.05). #Difference from pre-cast with old and young combined (P < 0.05), as there was no interaction