Hunh, Jane Fonda wasn't very thin when she was a "sex symbol" (I'm assuming they mean probably the period between Cat Ballou and Barbarella) although she had anorexia and bulimia -- that started when she did her workout tapes in the eighties, "no pain no gain" and all that. She always claimed that the fitness routine cured her eating disorders and she quit cold turkey, but I dunno -- overexercising is part of eating disorders too. From what I remember the 80s was when gyms and exercise classes became really popular (in the 70s it was jogging).