The present invention is an exercise machine that is versatile, easily adjustable, and easy to store and transport. The machine may be used by varying sizes of users for a wide variety of exercises to increase strength. The Core trainer is comprised of a seat with a press bar attached to an adjustable arm, which is attached to a resistance arm. The press bar is available in various interchangeable designs. A pivot allows the adjustable arm and resistance arm to be placed in varying positions in relation to the seat to provide for a multitude of exercise options. The Core trainer can be used with a number of attachments, and also folds into a compact unit that takes up a fraction of the space of other exercise machines.