The ornamental design for an exercisedevice, as shown and described.
FIG. 1 is a perspective view of a first embodiment of an exercise device, showing our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof bottom view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a perspective view of a second embodiment of an exercise device;
FIG. 9 is a front elevation view thereof;
FIG. 10 is a rear elevation view thereof;
FIG. 11 is a left side elevation view thereof;
FIG. 12 is a right side elevation view thereof bottom view thereof;
FIG. 13 is a top plan view thereof; and,
FIG. 14 is a bottom plan view thereof.
The short dash-short dash lines in the figures illustrate portions of the exercise device that form no part of the claimed design. The long dash-short dash lines indicate a surface boundary of the exercise device.