Fig. 1. Swing duration for unloaded (open circles) running and for running with
added limb weights of 30 g (solid gray circles) and 60 g (solid black
circles). Values significantly different (P<0.05) from the
unloaded value at each speed are indicated with an asterisk. The symbols for
swing duration with limb weights of 30 g and 60 g are offset from their
measured speed to the right and left, respectively.