Figure 3. Mean peak ankle displacements for walking and running at four gravity levels.

During the first part of the stance phase the ankle joint dorsiflexes and during the second part of the stance phase the ankle joint plantarflexes. Although dorsiflexion slightly decreased under reduced gravity (*P < 0.05), plantarflexion was statistically independent of gravity level (P > 0.05). Error bars are standard errors of the mean and are sometimes small enough to be hidden by the symbol.