The ornamental design for a fitnessgarment, as shown and described.
FIG. 1 is a perspective view of a fitness garment showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a right side view thereof; the left side being a mirror image thereof; and,
FIG. 7 is an enlarged detail of the circumscribed area in FIG. 1, showing the side of the fitness garment with the zipper open.
The broken lines depicting a human figure in FIG. 1 represent environmental subject matter that forms no part of the claimed design. The remaining broken lines in the figures represent portions of the fitness garment that form no part of the claimed design.