The ornamental design for a fitness pedal, as shown and described.
FIG. 1 is a front, left and bottom perspective view of a fitness pedal, showing my design.
FIG. 2 is a rear, right and top perspective view thereof.
FIG. 3 is a front elevation view thereof.
FIG. 4 is a rear elevation view thereof.
FIG. 5 is a left side elevation view thereof.
FIG. 6 is a right side elevation view thereof.
FIG. 7 is a top plan view thereof.
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is another front, left and bottom perspective view of the fitness pedal of FIG. 1 in another state.
The broken lines shown in the drawings are included for the purpose of illustrating portions of the fitness pedal that form no part of the claimed design.