Fig. 6. Average kinematic profiles of two-dimensional pectoral girdle, pelvic girdle and overall trunk angles for Up (water-to-ramp; left panels) and Down (ramp-to-water; right panels) sequences. Symbols indicate mean values; error bars are S.E.M. The solid blue line is the smoothed average (see Materials and methods). Gray regions are as in Fig. 5. All strides begin and end with the strike of the left hindfoot. Arrows above each panel indicate the direction of motion; Down sequences have been reversed to facilitate comparison across analogous strides.