Hi, everyone! I'm mostly a lurker, but I enjoy reading everyone's posts and encouragement each day. My personal trainer told me a couple of things that I thought y'all would be interested in:
1) The reason the weight comes back: When you diet, you lose 1/3 of your muscle mass along with the fat. This reduces your metabolism by 1/3 as well. So, once you reach your target weight you figure you'll maintain from there and go back to eating pretty much how you want. However, because your metabolism is 1/3 lower, you begin to gain it back more quickly than before. So, you start to diet again, but that reduces your muscle mass (and metabolism) by another 1/3 and on it goes. So, the key to losing weight and keeping your metabolism at a high rate is weight lifting. Working out 6 days per week (ideally), trading off weights and cardio. So, there you go...the science of why yo-yo dieting happens.
2) If you're going to go to the gym and do cardio, it's preferable to do it on an empty stomach so that you're forcing your body to burn its fat stores rather than your breakfast. If you're going to lift weights, you should have a starch and a protein so that your body has the energy stores to build muscle.
Anyway, there you go! Good luck, everyone!
Kellie