I am a 280 pound man. Yeaterday I was a 277 pound man. Yesterday I ate 1600 calories and worked out at the gym for 35 minutes. Not a lot, but still, it was my 1st workout in a very long time. I have 2 software programs for tracking weight, nutrition, and calories. Both programs indicate that a man of my size needs about 3500 calories a day just to maintain weight. So, you do the right things and in ONE DAY you gain 3 pounds. You look at the scale. You get depressed. You eat lots of bad stuff, now you weigh 282 pounds....... Well, I'm not going to do that.... it's off to the gym again. But boy am I frustrated.