every friday we bring the best health and fitness hacks with the health and nutrition editor, and joey bermanw much exercise we need to burn calories. that's already depressing. back with two viewers, they have been slimming down, bibi and joe ann. >> is it time for the weights reveal? >> yes. >> okay. here is the weight reveal. we are about to show it. >> whose is this? >> bibi, down four pounds! all right. good for you, girl. you did it. this is joann. >> cross your fingers. >> down .2. >> down? no up. >> that's weight stable. not gaining is a goal. >> .2 is like a banana, it is nothing. >> let's talk about portions. i think one of the problems we have is portioning out things. >> we eat with our eyes. question one of the quiz, look at this pasta, say how much. >> show us how much you think a serving is. >> one serving. >> one serving of pasta. >> what would you normally eat? >> pile it on. come on. be real. >> now what we are going to show you is -- >> that's not that far off. >> it is not that far off. this is a one cup serving, about the size of a light bulb, you don't know one ounce or