Abdominal muscle exercise apparatus

FIG. 1 is a perspective view of an abdominal muscle exercise apparatus.

FIG. 2 is a left view of the abdominal muscle exercise apparatus.

FIG. 3 is top view of the abdominal muscle exercise apparatus.

FIG. 4 is a front view of the abdominal muscle exercise apparatus.

FIG. 5 is right view of the abdominal muscle exercise apparatus.

FIG. 6 is a bottom view of the abdominal muscle exercise apparatus.

FIG. 7 is a rear view of the abdominal muscle exercise apparatus; and,

FIG. 8 shows a perspective view of the embodiment of FIG. 1 with the handle in a rotated position.

The ornamental design for an abdominal muscle exercise apparatus, as shown and described.

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