The core exercise bar is comprised of the main bar with one bar at each end that can retract into the main bar or extend outward with locking nuts at each end of the bar to hold them in place at each end of the retracting bars are threaded bolts that can be threaded in ward or outward at each end of the threaded bolts are brackets that pivot from side to side in an up and down motion with weighted rubber square handgrips attached to the brackets at each end.