Fig. 6

Example of typical movement pattern in a lumbar phase-plane diagram (a) with local minimum occurrences (X) and a lumbopelvic (FP-PL) coupling angle (b) with local minimum and maximum occurrences (+), and example of judder in a lumbar phase-plane diagram (c) with local minimum occurrences (X) and a lumbopelvic (FP-PL) coupling angle diagram (d) with local minimum and maximum occurrences (+). Solid line represents individual pattern, dotted line represents mean typical pattern, and dashed lines represent ±1 standard deviation of the typical pattern