Leg massage. Massage of whole legs by a pneumatic device. The black tubes carry air to compartments within the blue tubes which are blanketing the legs. As the air pressure increases the compartments exert a force on the legs; the massage is achieved by automatically varying the air pressure. This massage technique is used to increase blood circulation in the legs. Blood circulation to the legs can be reduced by illness, injury or by the narrowing of blood vessels due to the effects of cigarette smoking.