I suppose this would be more appropriate for a diet/exercise blog, but I don't visit many of those, and I do visit here. I've always had a very-much-so rectangle body--there wasn't a big difference between my hips and waist, and I definitely look "boyish.' I started working out (weights and swimming mostly, some running about once a week) about a year ago, and my shoulder line got stronger, giving me more definition to my body.
Yet started in the past month for so, I swear that I've become more bottom heavy (no complaints by the way! I've always wanted shapely, womanly hips!). First, I just look different. And secondly, pants that fit fine everywhere else are suddenly obscenely tight in the hips and butt. A pencil skirt I own that used to be cute and flattering is now suddenly not only overtight and a little tacky looking.
I feel like this goes against everything I've learned about body shape/type, but it's clearly happening. I haven't changed my diet/exercise routine lately, either.