FIG. 1 is a first perspective view of a first embodiment of a treadmill showing my new design;
FIG. 2 is a second perspective view of the first embodiment thereof;
FIG. 3 is a front view of the first embodiment thereof;
FIG. 4 is a back view of the first embodiment thereof;
FIG. 5 is a left side view of the first embodiment thereof;
FIG. 6 is a right side view of the first embodiment thereof;
FIG. 7 is a top view of the first embodiment thereof;
FIG. 8 is a bottom view of the first embodiment thereof;
FIG. 9 is a perspective view of another state of the first embodiment thereof;
FIG. 10 is an enlarged view of the selected portion in FIG. 1;
FIG. 11 is an enlarged view of the selected portion in FIG. 1;
FIG. 12 is an enlarged view of the selected portion in FIG. 2;
FIG. 13 is an enlarged view of the selected portion in FIG. 2;
FIG. 14 is a first perspective view of a second embodiment of a treadmill showing my new design;
FIG. 15 is a second perspective view of the second embodiment thereof;
FIG. 16 is a front view of the second embodiment thereof;
FIG. 17 is a back view of the second embodiment thereof;
FIG. 18 is a left side view of the second embodiment thereof;
FIG. 19 is a right side view of the second embodiment thereof;
FIG. 20 is a top view of the second embodiment thereof;
FIG. 21 is a bottom view of the second embodiment thereof;
FIG. 22 is a perspective view of another state of the second embodiment thereof;
FIG. 23 is an enlarged view of the selected portion in FIG. 14;
FIG. 24 is an enlarged view of the selected portion in FIG. 14;
FIG. 25 is an enlarged view of the selected portion in FIG. 15; and,
FIG. 26 is an enlarged view of the selected portion in FIG. 15.
The broken lines shown in the drawings depict portions of the treadmill in which the design is embodied that form no part of the claimed design.