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Fig. 3. Principal component loading scores for PC I and PC II during walking and
running for the leg flexors. Each point shows the mean ±
S.E.M. loading scores pooled from the six subjects
(N>348). The 20 points on each graph show the PC loading scores at
the 20 successive time-windows during each stride, graded from black
immediately after heel-strike to light grey immediately before the next
heel-strike. Data are shown for the biceps femoris (A), the semitendinosus (B)
and the tibialis anterior (C).