We claim the ornamental design for an exercising apparatus, as shown and described.
FIG. 1 is a perspective view of an exercising apparatus showing the 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;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a perspective view showing a state of use thereof.
The broken lines in the drawing figures are for the purpose of illustrating both portions of the exercising apparatus and an environment of use and form no part of the claimed design.