FIG. 1 is a perspective view of a treadmill deck of the present invention.

FIG. 2 is a front view of the treadmill deck of FIG. 1.

FIG. 3 is a rear view of the treadmill deck of FIG. 1.

FIG. 4 is a left side view of the treadmill deck of FIG. 1.

FIG. 5 is a right side view of the treadmill deck of FIG. 1.

FIG. 6 is a top view of the treadmill deck of FIG. 1, the opposing bottom view being a mirror image thereof; and,

FIG. 7 is a perspective view of the treadmill deck of FIG. 1, wherein the broken line example of environmental structure is for illustrative purposes only and forms no part of the claimed design.