Exercise machine

An exercise machine comprising:

• a frame having at least one longitudinal rail extending between a first support member and a second support member,
• a carriage supporting a platform moveable along the at least one longitudinal rail,
• at least one retention spring or band attached to the carriage,
• a monitor for monitoring whether each of the at least one retention spring or band is engaged or disengaged,
• a sensor for monitoring a position of the platform along the at least one longitudinal rail,
• a cross bar pivotally connected to an end of the frame by at least one pivot arm,
• wherein the at least one retention spring or band is selectively attachable to the frame and at least one cord is extendable from the carriage of the frame and terminates in a handle,
• wherein the at least one cord is selectively positionable between a first position and a second position,
• wherein in the first position, the at least one cord extends around a first pulley back towards the carriage such that applying tension on the at least one cord moves the carriage, and
• wherein in the second position, the at least one cord extends around a second pulley spaced apart from the first pulley and the handle of the cord receives a part of the cross bar such that applying tension on the at least one cord applies tension to the cross bar.

An exercise machine comprising:

• a frame having at least one longitudinal rail extending between a first support member and a second support member,
• a carriage supporting a platform moveable along the at least one longitudinal rail,
• at least one retention spring or band attached to the carriage,
• a monitor for monitoring whether each of the at least one retention spring or band is engaged or disengaged,
• a sensor for monitoring a position of the platform along the at least one longitudinal rail, and
• a movable locking pin,
• wherein the at least one retention spring or band is selectively attachable to the frame by a button and plunger mechanism,
• wherein the movable locking pin is provided in a channel transverse to a direction of movement of the button and plunger mechanism whereby disengagement of the at least one retention spring or band by movement of the button and plunger mechanism allows movement of the moveable locking pin into a space previously occupied by the button and plunger mechanism.