If you are lean now, or have lost some weight or may be not losing weight despite doing exercise and dieting; then you have to change your habits. Most weight gain does not happen overnight and it takes years of bad habits for you to get that belly fat. There are a number of indicators that will help you realize if you're one of those who'll put on weight in the future. Here are some BAD habits that will certainly make you gain weight. Watch the video to know more.