A doorway mounted body exercise apparatus has upper and lower horizontal bars bridging the doorway and carrying respective pulleys and, a rearwardly protruding weight set supporting arm which can be swung between either lateral side to the rear of the doorway to accommodate left and right hand hinged doors and can be retracted into the doorway to permit the door to be completely closed while still mounted. Different cabling arrangements enable the weight set to be used as a counter weight for body weight assistance or additional resistance. An upper frame carrying the upper bar is collapsible for removal and storage or to enable a person to walk through the doorway. The lower bar is hinged at one end to the jamb for swinging up against the jamb so as not to obstruct the doorway when not in use. Footpads on the upper frame enable exercising while hanging upside down.
