It's pretty common to put on a few extra pounds over the winter months, and while it's usually put down to how much you ate at Christmas, or that your body is layering up to keep you warm while it's cold, it turns out it's got nothing to do with either of those things.We spend longer indoors, move less and eat more – so it’s only natural that we might put on a little extra insulation over the winter months. However, maintaining healthy eating and lifestyle habits over winter is important not only for weight management, but for our general health as well.