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Fig. 2. Mean ground reaction force (GRF) data for steady-speed hopping (gray) and
jumping (black). (A) The GRF vector is shown relative to the rock wallaby's
average body position, leg angle (broken line) and estimated CoM position
during stance. (B) Mean GRF recordings in body weights (BW) plotted against
percent of stance. (C) Vertical and horizontal stance impulses. Horizontal
impulses are divided in to negative (), positive (+) and net (patterned
bars) impulses. Dotted lines (B) and error bars (C) indicate
S.E.M.