Abstract: Some embodiments are directed to an exercise apparatus having a frame comprising a first end, a second end and two generally horizontal frame members extending from the first end to the second end, a carriage supported by the horizontal frame members, the carriage being configured to translate along at least a portion of a length of the horizontal frame members and having a planar support surface, a first set of springs supported by the carriage, the first set of springs being configured to extend toward at least the first end of the frame, and a convertible platform positioned adjacent to at least one of the first and second ends of the frame. A vertical height of the convertible platform is adjustable from a first, platform or carriage height position to at least a second, chair position relative to a ground surface.

Abstract: Some embodiments are directed to an exercise apparatus having a frame comprising a first end, a second end and two generally horizontal frame members extending from the first end to the second end, a carriage supported by the horizontal frame members, the carriage being configured to translate along at least a portion of a length of the horizontal frame members and having a planar support surface, a first set of springs supported by the carriage, the first set of springs being configured to extend toward at least the first end of the frame, and a convertible platform positioned adjacent to at least one of the first and second ends of the frame. A vertical height of the convertible platform is adjustable from a first, platform or carriate height position to at least a second, chair position relative to a ground surface.