Figure 2
From: The free moment in walking and its change with foot rotation angle
The free moment time history pattern normal walking. a) FM during normal walking (black line is average, grey shadows are ± 1 SD variability bands) and when walking with an internally rotated foot (white line is mean, red shadows are ± 1 SD variability bands) and b) FM during normal walking (black line is average, grey shadows are ± 1 SD variability bands) and when walking with an externally rotated foot (white line is average, red shadows are ± 1 SD variability bands).