Day 3 was yesterday, and I forgot to post, so I'm going to talk about it now. I haven't noticed any changes in my sleeping patterns or appetite (though I am working on that as well, because I am often a constant snacker and it's really unhealthy). I did, however, find the exercises easier to do at first. This, of course, let to me following Natalie in the beginning, and by the time I was half way through, I was definitely regretting that. I still don't like lunges and squats very much at all - they just feel awkward to me - but at least I can tell when I'm getting close to the end, haha.
Because of my knees, I can't get up from the floor as quickly as they can, which is pretty irritating sometimes, but I finally gave up on trying and just start in a beat late. I'm not unhappy with how things are going, by any means, but I'm still not really enjoying it yet.