Fig. 3. Representative principal and axial bone strains for the (A) femur and (B) TBT for five footfalls from a 36 week old, 27 kg emu running with a 0.41DF at 5.40 m s^–1. Principal tensile strains, green; principal compressive strains, red. The axial strains measured from the lateral femur and cranial and medial TBT are in black. The shaded bars represent the stance phase during the locomotor cycle.