A crutch (102) for supporting a leg of a user is described. The crutch comprises a handle (112), a base portion (116) having a footprint when contacting the ground, and a main rod (123) connecting the handle and the base portion. The base portion (116) is moveable to alter the length of the crutch (102) from a first configuration to a second configuration, and wherein in the first configuration the handle (112) is positioned at a first distance from the base portion (116) for gripping by an ambulatory user and in the second configuration the handle (112) is positioned at a second, shorter, distance from the base portion (116) for resting a foot of a sitting user; and wherein the base portion (116) provides a smaller footprint in the first configuration than in the second configuration.