Source:http://linkedlifedata.com/resource/umls/id/C0180776
UMD: Devices designed to facilitate physical exertion of body muscles by voluntary contraction and relaxation of the muscles controlling the body part (i.e. active exercisers) or by motion imparted on the body part by the device (i.e., passive exercisers). Active exercisers usually are intended to keep and improve the cardiorespiratory function and general fitness and to increase muscle strength (e.g., hands, limbs, back) and to improve balance and/or flexibility; they are also used during physical therapy and rehabilitation. Passive exercisers mainly are intended for physical therapy and rehabilitation after illness, trauma, or aging (e.g., upper and/or lower limbs). Computer-aided exercisers intended to train and assess patients by using a dedicated computerized unit are also available.