Exercise machine

The design is the visual features of the EXERCISE MACHINE shown in solid lines in the drawings, whether those features are features of one of shape, configuration, ornament or pattern or are a combination of any of these features. The portions shown in stippled lines do not form part of the design.FIG. 1 shows a front isometric view of an exercise machine;FIG. 2 shows a back isometric view of the exercise machine in FIG. 1.;FIG. 3 shows a front view of the exercise machine in FIG. 1.;FIG. 4 shows a back view of the exercise machine in FIG. 1.;FIG. 5 shows a left side view of the exercise machine in FIG. 1.; FIG. 6 shows a right side view of the exercise machine in FIG. 1.; FIG. 7 shows a top view of the exercise machine in FIG. 1.; and FIG. 8 shows a bottom view of the exercise machine in FIG. 1.