A device for aiding a human joint, the device including a booster mechanism including a two part housing, a first part of the housing having a first end adapted for coupling adjacent one side of the joint and a second part of the housing having a second end adapted for coupling adjacent a second side of the joint, one part of the housing being movable relative to the other part of the housing, a spring mounted between the first part of the housing and the second part of the housing, a locking mechanism in the housing for releasably locking the spring when the spring is in a loaded state, and a release element engaging the locking mechanism for unlocking and releasing the loaded spring to boost the first end of the housing away from the second end of the housing.
