An arm in deep space extension gives us the underarm double curve (see arrows), proof of the arm's unvarying structural rhythm (left).
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This side view of the right leg, bent at the knee, shows the structural rhythm of the bent leg clearly indicated (see arrows) with an S-line curve (above).
< The leg has WZR structural rhythms, one for the IURQW view and one for the VLGH view, each of which is decidedly different from the other. This side view of the right leg shows a long S-line curve taken from the active thrusts of the leg muscles (see arrows). This S-line starts high on the front thigh, reverses at the knee, and moves rearward down the calf bulge (left).
