A guy weighing 1000 pound must consult doctor first before staring any sort of weight loss program. Before starting with any exercise program, it better to go for clinical exercise testing or graded exercise testing (GXT's) to check his body's response to exercise. Based on the test, proper exercises can be prescribed whereby mode of exercises, intensity, frequency and duration will be decided. If you are looking to lose weight in one month then better go for surgery as with exercise its practically impossible.