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Fig. 1. Mean myoelectric intensity spectra for the plantaris (A), soleus (B) and
medial gastrocnemius (C) muscle during three locomotor conditions
(N=6 for each muscle). Data are shown as mean (black line) and s.e.m.
(grey lines), with the division between stance and swing phase denoted by the
broken, grey vertical line; 0% stride duration represents initial ground
contact. Partitioning of the stride is represented in D, including data from
the plantaris muscle (10° 40 cm s–1). The division
between stance and swing phase is shown by the broken, thick, vertical grey
line.