Assistance system for a gliding board or snowshoe

A set of equipment for doing a mountain-sport comprising at least a sliding board or a walking equipment, and at least a system for helping movements of a user's foot, said user's foot being able to be received in a footwear portion, the front end of which is pivotably mounted relative to the sliding board or to the walking equipment, with the system comprising a spring which can be secured to the sliding board or to the walking equipment so as to be applied to a bearing zone of the footwear portion by exerting a pressure on said bearing zone when the bearing zone is moved closer to the sliding board or to the walking equipment,

• comprising a binding device configured for removeably securing the spring, with the binding device being able to be fastened to a binding zone of the sliding board or of the walking equipment, and wherein the binding zone is located on the sliding board or the walking equipment so as to be able to be positioned opposite a plantar arch of the user's foot.