The ornamental design for a wristband for tracking fitness, as shown and described.
FIG. 1 is a front right perspective view of a wristband for tracking fitness, showing our new design in an open position;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a front right perspective view of the bottom thereof;
FIG. 9 is a right perspective view of the wristband for tracking fitness of FIG. 1, showing our new design in a folded position;
FIG. 10 is a front elevation view thereof;
FIG. 11 is a rear elevation view thereof;
FIG. 12 is a right side elevational view thereof;
FIG. 13 is a left side elevational view thereof;
FIG. 14 is a top plan view thereof;
FIG. 15 is a bottom plan view thereof; and,
FIG. 16 is a right rear perspective view thereof.
The broken lines in FIGS. 1-16 represent portions of the wristband for tracking fitness that form no part of the claimed design. The stipple-filled areas represent a contrast in appearance that forms part of the claimed design.