An exercise support machine, for at least partially relieving the weight of a user during exercise, comprising a pelvic support (21), arranged to support the user via a pelvic region； a biasing member (13), arranged to bias the pelvic support in a biasing direction away from the ground, thus at least partially relieving the weight of the user； and a moveable mounting arrangement (19) via which the pelvic support is mounted on the biasing member. The pelvic support (21) is arranged for pivotal movement about a yaw axis, which extends in the biasing direction, and the pelvic support (21) is arranged for pivotal movement about a roll axis which is perpendicular to the yaw axis； and the moveable mounting arrangement provides a freedom of movement to the pelvic support (21) such that the pelvic support (21) is able to pivot about the yaw axis and the moveable mounting arrangement 19 provides a freedom of movement to the pelvic support (21) such that the pelvic support is able to pivot about the roll axis, thus allowing the user to walk and/or run with a normal gait whilst supported by the pelvic support. The moveable mounting arrangement (19) comprises a plurality of linkages which provide said freedoms of movement to the pelvic support such that it is able to pivot about the yaw axis and the roll axis.L'invention concerne une machine de support d'exercice permettant de soulager au moins partiellement le poids d'un utilisateur pendant un exercice, qui comprend un support pelvien (21), agencé pour supporter l'utilisateur par l'intermédiaire d'une zone pelvienne ； un élément de sollicitation (13), agencé pour solliciter le support pelvien dans une direction de sollicitation à l'opposé du sol, réduisant ainsi au moins partiellement le poids de l'utilisateur ； et un agencement de montage mobile (19) par l'intermédiaire duquel le support pelvien est monté sur l'élément de sollicitation. Le support pelvien (21) est agencé pour un mouvement pivotant autour d'un axe de lacet, qu
