I too was sceptical at that point, but let's for the moment assume she really was working out that much.  She says she was losing weight, was getting dates, fitting into people clothes and in her own words "was feeling like pretty hot shit".    So all in all life was going fairly well for her as a result of eating right and exercising, however then came one day when she sat down and thought, when can I eat cake?  It's just outstanding that it admits to life going well but stuffing itself with cake was more important!  It could have had cake the whole time, just normal portions once a week or so!