Arm exercisers increase the range of movement and flexibility for those suffering from arthritis, injuries to the shoulder or arm, or discomfort following surgery. The arm, shoulders and chest may also be reinforced by a medical arm exerciser. Arm exercisers may be placed on the floor or connected to a wall over a fence. To further increase the range of mobility in various directions of your shoulder, you can use the hospital arm exerciser to do different shoulder exercises. Your physical trainer will advise you to use the arm exerciser with suitable techniques, but make careful to obey the instructions closely: too fast after surgery, vigorous range of motion movements can damage the shoulder and prolong recovery. Consult the doctor and physical trainer if you have concerns about whether shoulder range of motion movements is safe for you. In a pain-free range, the medical arm exerciser encourages movement.