Standing calf raise exercise machine

FIG. 1 is a front perspective view of a standing calf raise exercise machine, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left-side elevational view thereof;

FIG. 6 is a tight-side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines showing weights and a person in FIG. 1 depict environmental matter and form no part of the claimed design.