Walking aids are made to improve stability and provide additional support and a stable center of gravity. They reduce lower-limb loading by directing load through the arms and the walking aid. Lower impact and static forces are transmitted through the affected limbs. Walking aids also generate movement. The walking aid and arms can substitute for the muscles and joints of the spine, pelvis and/or legs in the generation of dynamic forces during walking.
Wheelchairs may be either manually propelled or electrically powered. Mobility scooters are electronically powered. Wheelchairs and scooters are usually recommended for those who have significant mobility and/or balance impairment. A stairlift is another form of mobility device that is used for lifting people and wheelchairs up and down stairs. Mobility aids also include adaptive technology such as sling lifts or other patient transfer devices that help transfer users between beds and chairs or lift chairs.