In order to lose stomach fat, you will need a timer or a stopwatch. First, you should set it for 5 minutes. Then, you will need to get into pushup position. You should be up on your toes. Your arms should be shoulder length apart. Your hands should be flat on the floor, and you back should be straight, with your stomach and buttocks in. Hold this position for a count of 10. Next, you should transition to a modified plank position. Bend your elbows and rest your forearm on the floor. Hold this position for a count of 10. Then, rotate to each, one at a time. Hold each position for a count of 10. Make sure that you keep your body straight. Then, transition back into push position and hold this position, while you do cross motion leg exercises. Repeat all of those exercises, until the timer goes off.