The ornamental design for an exerciseopenglove, as shown and described.
FIG. 1 is a front elevational view of an exercise open glove showing my new design; the hand shown in phantom is illustrative of the claimed design while being worn and forms no part of the claimed design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a right elevational view thereof;
FIG. 6 is a left side elevational view thereof; and,
FIG. 7 is a rear elevational view thereof showing my design.