A device for use with an exerciser device, such as a reformer, which permits adjustment of a resistance system, even when connected to a resistance source, by selectively relieving a resistance force imparted on the resistance adjustment system when changing a resistance and automatically reengaging the resistance force when exercising. A strain relief is coupled to a linkage between the resistance source and a resistance adjuster. When engaged, the strain relief selectively reduces the resistance force transmitted through the linkage to the resistance adjuster to permit movement of the resistance adjuster relative to a purchase. When disengaged the strain relief permits transmission of the resistance force through the linkage to the resistance adjuster.