Exercise device

FIG. 1 is an isometric view of an exercise device showing my new design:

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a side elevational view thereof; the opposite side being a mirror image thereof; and,

FIG. 6 is a rear elevational view thereof.

The broken lines illustrate portions of the exercise device which form no part of the claimed design.