Selectorized dumbbell having an upper selector and weights formed by laterally spaced weight plates joined by thin connecting walls

A selectorized dumbbell, which comprises:

• (a) a handle;
• (b) a plurality of nested weights;
• (c) a selector for selectively coupling a desired number of weights to the handle depending upon a position of the selector relative to the nested weights and handle;
• and
• (d) each weight having a box-shaped configuration defined by a left weight plate and a right weight plate joined together by substantially planar and substantially imperforate front and rear connecting walls, wherein each of the front and rear connecting walls of each weight has a height that extends substantially over a full height of the weight plates of each weight, wherein the front and rear connecting walls are joined to front and rear edges, respectively, of the weight plates, and wherein the box-shaped configurations of the plurality of nested weights have progressively decreasing sizes that allow the box-shaped configurations to be nested inside of one another with the left weight plates being stacked adjacent one another, with the right weight plates being stacked adjacent one another, with the front connecting walls being stacked adjacent one another, and with the rear connecting walls being stacked adjacent one another.