I've been doing this routine. 20 mins eliptical trainer, (Circuit Training) Bench press 20 mins, Sqauts 10 mins, Bicep Curls 20 mins, Ab Crunches 20 mins, 40 Push-ups, 20 mins of tricep extensions, 60 lunges, 20 min on treadmill, REPEAT ALL, 40 Sit-ups and then REPEAT ALL agian. Will take about 3-4 hours a day. I go for ruck marches on the weekends, 80lb backpack for 15km. Army tough!