Say you're on a weight loss plan. Diet, exercise, the whole bit. In order to CONTINUE losing weight, do you eventually have to change your routine? As in, would you have to lower how many calories and/or increase the amount of time you exercise in order to keep losing? Is it possible for your routine to put your weight at a standstill, so that you have to change or else you'll just remain at your current weight? Or would a low-calorie, regular exercise routine that's helping you lose weight continue helping all the way to your goal weight without needing adjustment?