1. A method comprising: determining a task to be performed by a robot, wherein the robot includes one or more movable members and a hydraulic system, wherein the hydraulic system includes at least (i) one or more hydraulic actuators configured to operate the one or more movable members, and (ii) a source of hydraulic fluid; determining an anticipated pressure level for the task; causing hydraulic fluid having the anticipated pressure level to flow from the source to the one or more hydraulic actuators for the robot to perform the task; receiving, from one or more sensors coupled to the robot, information indicating that a disturbance to the robot is about to occur; based on the information, determining a modified pressure level for the hydraulic fluid; and prior to occurrence of the disturbance, adjusting operation of the hydraulic system to cause hydraulic fluid having the modified pressure level to flow from the source to the one or more hydraulic actuators for the robot.