Cleanse --its actually used by hospitals for heart patients who need to lose weight quickly before sugery. Sacred Heart Diet I think... (i think when i heard about it in the 80s it was touted as the stewardess diet -- you know.
7 day waist slimming challenge...not sure about waist training 6-8 hours a day(not to start out with anyway). I would recommend starting at 1 hour the first day then adding 30 mins to an hour daily. Or whatever is comfortable. :-)