Reactive postural control is defined by modifying sen- sory and motor systems in response to changing tasks and externally induced environmental demands.16 Contrary to anticipatory actions, reactive postural control mechanisms occur in a “compensatory” or feedback manner in response to some external perturbation.21 Models of reactive postur- al control research paradigms include sliding force plates,22 treadmill perturbation training,23 vibratory platforms,24 and trigger-release load cell devices.