Sit-up exercise device

USD1117565SActive Publication Date: 2026-03-10ZHANG XIANLIAN

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[0001] FIG. 1 is a top perspective view of a sit-up exercise device, showing my new design;

[0002] FIG. 2 is a front view thereof;

[0003] FIG. 3 is a rear view thereof;

[0004] FIG. 4 is a left side view thereof;

[0005] FIG. 5 is a right side view thereof;

[0006] FIG. 6 is a top view thereof;

[0007] FIG. 7 is a rear perspective view thereof; and,

[0008] FIG. 8 is an enlarged detail view of area 8 in FIG. 1.

[0009] The broken lines in the drawings illustrate the portions of the sit-up exercise device, which form no part of the claimed design.

[0010] The dash-dot-dash broken lines encircling the enlarged views are for annotative purposes only and form no part of the claim thereof.

The ornamental design for a sit-up exercise device, as shown and described.