Kim Kardashian Conflicted Over Skechers?

Kim made a 1-year deal with the company, which touted Shape-Ups as a shoe that promotes toning and weight loss. The FTC now says the claims are bogus ... that there's no proof the shoes do squat.

But Kim is telling friends and family ... when she signed the original deal, she was a habitual Shape-Ups user and it toned the back of her legs and her considerable ass.

Kim says she signed a 1-year deal that ended in January, but even before the expiration she started to hear about the new research which showed the shoe didn't work, so she stopped promoting it all together.

Even though she wasn't about to promote the shoes for other people to wear, Kim had conflicting feelings about using the product herself.