You want to do sit-ups, but asking someone to hold your ankles or hooking your feet under furniture is awkward. So you skip it—not because you're lazy, but because solo sit-ups are inconvenient.
Most ab gear doesn’t fix it either. Suction cups lose grip, spring-loaded machines start squeaking, and bulky equipment ends up forgotten in a closet.
A gym membership takes extra time, while a full sit-up bench costs more and takes up space. So the workout keeps getting pushed to tomorrow.