Abstract: A treadmill includes a braking device incorporated in the body of the treadmill and operated for applying a resistance or load against the rotary motion of treadmill rollers on which a wheelchair's side wheels are supported. The angle of inclination of the treadmill rollers may be adjusted according to any variation in the angle of inclination for the wheelchair wheels supported by the treadmill rollers. To this end, the user of the wheelchair can adjust the angle of inclination for the treadmill rollers. A guide member for supporting the front wheel of the wheelchair may also be included, and the guide member can be adjusted to accommodate practically all types and sizes of the wheelchair. A central control panel is provided at a particular single point on the treadmill for enabling the user of the wheelchair to control the braking device, adjust the angle of inclination, and moving the guide member.