Figure 7. Normalised time profiles of right and left forearm angle projected onto the XZ (horizontal) plane with respect to the X axis for SC samples taken in the third 25m lap of each 100m swim (1-3; 2-3, 3-3; 4.3). In accordance with convention, positive indicates anticlockwise alignment (to the swimmer’s left as viewed from above) and negative indicates clockwise alignment (to the swimmer’s right as viewed from above). Note that, for example, the right forearm can be angled to the left (as it is during the in-sweep and recovery) and, similarly, the left forearm can be angled to the right.