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Figure 3


Fig. 3. Observed and model energy fluctuations (A,B), accelerations (C,D) and powers (E) for three example walking strides ranging from very slow (i) through slow (ii) to moderate (iii). Model outcomes, derived using empirical kinematic inputs and the stiff-limbed, constant energy (the immediate energy recovery strategy) model are shown in blue; values derived from forceplate measurements and kinematics are shown in red. Model accelerations go off-scale at the instants of each foot initial contact. Foot contact timings (F) can be used to identify periods of double and triple support.





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