I've started a pretty serious diet/workout plan in order to be down to about 6-9% body fat by may, (maybe earlier). I started 5 weeks ago, doing a ~1300 calorie diet with at least 2 workouts a day, including weight training, jogging and walking. I do at least 30 minutes on each. In the first 4 weeks I lost 20 pounds really easily, during my 5th week I hardcore plateaued and it seems my body might be in a "survival state" because I haven't been able to poop all week and I haven't lost any weight even though I have been following my diet to a T and I have been working out only taking a break once a week. I need to get back to fast weight loss, any tips? Am I doing something wrong? and also I am about 6 foot tall and about 180 pounds right now. I really am just wondering about plateauing, As how often this will happen and how can I overcome it. I really want to get down to about 165-170 pounds but I can't seem to be positive about getting there when I am having some problems with staying regular, if pooping has anything to do with it. I just think it has something to do with my body being in shock and not losing weight.