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Reciprocal lower-extremity tasks. One and 2 years following locomotor training, the child was able to perform rhythmic, reciprocal lower-extremity movements in the context of other locomotor tasks. Lower-extremity activities in addition to walking included reciprocal lower-extremity flexion and extension in a supine position (A), tricycle pedaling (B), crawling (C), stair climbing (D), and swimming (E, F).
