A quick hook-up and release anchor belt assembly for adjustably interconnecting two detachably coupled belts that are especially suited in combination for constraining the abdominal portion of a weight lifter's torso, and the like, the belt being of substantial thickness. Each belt includes a flexible elongate length and optionally a rigid end portion. The belts are positionable and detachably attachable along their elongate length by means of hook and loop fasteners. A releasable toggle or connector is operable to instantly draw up or alternatively allow interconnected separation and attachment of the two end portions of the coupled belts.