Method for adjusting the weight-training mass of a weightplate device

A method for adjusting the weight of a dumbbell of the type including:

• a bar that extends generally axially between opposing end regions,
• a weight plate mass mounted about the bar at each end region,
• said mounted weight plate masses being retained at the respective end regions to define a handle region axially inward of the end regions that can be gripped by a user during exercise movement of the dumbbell, and
• said weight plate masses being mechanically secured at a respective end region to the dumbbell,
• wherein the method comprises the steps of:
• mounting an added weight plate axially outward of the weight plate mass at each end region so that a magnetic pole region carried by the added weight plate is magnetically coupled to the weight plate mass to magnetically secure the added weight plate to the dumbbell via a magnetically-securing coupling force, and
• rotating the added weight plate with respect to the weight plate mass, when decoupling is desired, to bring the carried magnetic pole region sufficiently into alignment with a magnetic pole region of like polarity carried by the weight plate mass so that the added weight plate is magnetically repelled from the weight plate mass.