“…Also noteworthy is stair negotiation, which implies larger amounts of energy to be produced (ascending) or dissipated (descending) proximally, and increased angular excursion and joint moment at hip and knee level [10,11]. Moreover, it is well documented that walking speed has noticeable effects on kinematics, kinetics and muscle recruitment [12,13] and gait at increased speed is able to highlight abnormal locomotor patterns [14].…”