The ornamental design for an abdominalexerciseplatform, as shown and described.
FIG. 1 is a top perspective view of an abdominal exercise platform showing my new design;
FIG. 2 is a bottom 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 right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is a bottom perspective view thereof, showing an attachable vibrating device in broken lines.
The broken line showing aesthetic design features in FIGS. 1-9 and a vibrating device in FIG. 9 is included for the purpose of illustrating environmental structure and forms no part of the claimed design.