People with haemophilia showed less sway compared to healthy individuals in the frequency variable under the condition of a reduced base of support (semi-tandem), on an unstable surface (foam) and with eyes closed. The variables that showed interactions were mainly frequency and velocity. Predominantly, the interactions between groups and conditions occurred in variables in the anteroposterior direction, whose main balance-maintenance strategies involve the ankle and hip.
Bernardes et al. (Wed,) studied this question.