you shouldnt do too much when you are first starting out. Also, if you dont like workouts dont do em. I hate with a passion doing weights or anything, but i love walking, so i do that. I lost heaps of weight before by walking for 30 mins or more. It gets you puffed but not tired. What you should do is BUILD your exercise time. YOur body needs time to get fitter and fitter. Try doing less then build it up when you get better at it. Hope this helps!