how to log ab lounger?

caribeals

i have an ab lounger. i know a lot of people claim its a gimmick, but its working for me! i can't physically do a regular sit up on the floor yet... i'm working on it! but on the ab lounger i can feel my abs working, so i guess its better than nothing. how do i log it? i do not have an HRM. i thought of listing it as crunches, but i wasn't sure if that would be accurate? thanks!