Fig. 3. Comparison of mass (A), fiber length (B) and total physiological cross-sectional area (PCSA; C) across functional muscle groups in the rat hindlimb. Flexors at the hip, knee and ankle are shown as solid bars, whereas the extensors are shown as hatched bars. The functional groups include hip flexors (N=2 muscles), hip extensors (N=6), knee flexors (N=9), knee extensors (N=4), dorsiflexors (N=3) and plantarflexors (N=9). ^*Significant difference between muscle groups at each joint (P<0.05).