An exercise apparatus includes a vertical stack of weights, including a top plate,
and at least one additional weight disposed adjacent the top plate. The additional
weight may be a plate having a height, a width, and a thickness that is smaller
than the width and smaller than the height, and arranged so that its thickness
extends horizontally toward the stack of weights, and/or multiple additional weights
may be arranged to define a horizontal array on at least one side of the stack
of weights. The additional weight(s) may be movably mounted on the frame for movement
along a path defined by interfaces between opposite outer surfaces of the weight(s)
and respective guide surfaces on the frame. A selector rod may be movably mounted
on the top plate for movement into and out of engagement with one or more of the
additional weights, and/or arranged to define a longitudinal axis that extends
through all of the additional weights and perpendicular to the stack of weights.
A user operated member may be rotatably mounted on the top plate and linked to
the selector rod.