An exercise device has a base, an exercise platform (which can be split
into a left and right platform) and two or more springs that connect the
base and the exercise platform(s) and hold the exercise platform(s)
substantially parallel to the base when the exercise device is not in
use, preventing the exercise platform(s) from coming into contact with
the base when the exercise device is in use and allowing the position of
the exercise platform to vary relative to the base as weight is applied
to the exercise platform(s) at different points apart from a center point
of weight balance while straps can be used to stabilize or selectively
vary the center point of weight balance.