The ornamental design for a weight reducing apparatus, as shown and described.
FIG. 1 is a perspective view of a weight reducing apparatus showing my design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a back elevation view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line shown in the drawings is included for the purpose of illustrating portions of the weight reducing apparatus and forms no part of the claimed design.