An adjustable leg component for a legged movement assistance device to be worn by a user, the leg component comprising: a central carrier; and first and second housings that are located on opposite sides of the central carrier and mechanically connected to the central carrier; and an adjustment mechanism configured to effect movement of the first housing either closer to or farther from the second housing to adjust a length of the leg component; characterised in that: the adjustment mechanism includes a drive shaft that extends through the central carrier, and a plurality of driven shafts (204a, 204b) that extend through the central carrier and are connected at a first end to the first housing and connected at a second end opposite from the first end to the second housing; and the drive shaft is configured to rotate to drive the plurality of driven shafts (204a, 204b) to effect translational movement of the driven shafts (204a, 204b) to move the first housing closer to or farther from the second housing to adjust the length of the leg component; wherein the plurality of driven shafts (204a, 204b) extend through the central carrier in a longitudinal direction along a longitudinal axis of the leg component, and the drive shaft extends through the central carrier in a lateral direction that is perpendicular to the longitudinal direction. a central carrier; and first and second housings that are located on opposite sides of the central carrier and mechanically connected to the central carrier; and an adjustment mechanism configured to effect movement of the first housing either closer to or farther from the second housing to adjust a length of the leg component; characterised in that: the adjustment mechanism includes a drive shaft that extends through the central carrier, and a plurality of driven shafts (204a, 204b) that extend through the central carrier and are connected at a first end to the first housing and connected at a second end opposite from the first end to the second housing; and the drive shaft is configured to rotate to drive the plurality of driven shafts (204a, 204b) to effect translational movement of the driven shafts (204a, 204b) to move the first housing closer to or farther from the second housing to adjust the length of the leg component; wherein the plurality of driven shafts (204a, 204b) extend through the central carrier in a longitudinal direction along a longitudinal axis of the leg component, and the drive shaft extends through the central carrier in a lateral direction that is perpendicular to the longitudinal direction. the adjustment mechanism includes a drive shaft that extends through the central carrier, and a plurality of driven shafts (204a, 204b) that extend through the central carrier and are connected at a first end to the first housing and connected at a second end opposite from the first end to the second housing; and the drive shaft is configured to rotate to drive the plurality of driven shafts (204a, 204b) to effect translational movement of the driven shafts (204a, 204b) to move the first housing closer to or farther from the second housing to adjust the length of the leg component; wherein the plurality of driven shafts (204a, 204b) extend through the central carrier in a longitudinal direction along a longitudinal axis of the leg component, and the drive shaft extends through the central carrier in a lateral direction that is perpendicular to the longitudinal direction.